The in view of the western coal-filed mechanized mining caving face in steeply inclined, thick top coal caving and fully mechanized top coal caving emission with high concentrations of hydrogen sulfide, caused great harm to the particularity of the advance of working face pre grouting absorption fluid technology of sulfide hazard prevention and control. Based on hole sealing technology, note absorption fluid technology and injection of different absorption liquid parameters reduce the hydrogen sulfide test research, it is concluded that a for prevention and treatment of extra thick top emission technology of sulfide hazard. Field research shows that coal pre injection Wells stent coal absorbing liquid hydrogen sulfide reducing efficiency reached 74.6%, achieve good control effect of hydrogen sulfide.

Combined with the features of mine shaft shield construction，the several form of Combined with the features of mine shaft shield construction，the several form of ventilation system is proposed and compared for mine shaft shield construction with long distance and gentle slope. Finally a single push-duct ventilation system is adopted. The research results are applied in the demonstration project，the ventilation system is stability，ventilated effect is good，it has provided the safeguard for the safety of shield construction.

Through analysis of the situation and seam stability in Donghuantuo mining south area, combining with Donghuantuo mining situation under building and domestic mining technology level at present, designed with mining width 60m, 70m wide left of strip mining, and is expected to surface subsidence and deformation movement. Dissertation uses FLAC3D finite difference method for numerical simulation. The design’s effect of movement deformation and surface subsidence is small. It ensure the destruction of the surface buildings in grade Ⅰ or less. Engineering Practice has proved that the accuracy of the simulation. To some extent, the design extend the service life of the mine, reduce coal production costs and improve the efficiency of coal production.

In order to improve the efficiency of mining as well as transfer slicing mining to large mining height of a fully mechanized in ZhaoGuⅡmine 11020 working face,Based on the hydro geological exploration,geotechnical test,point load strength test and dry saturated water absorption test,measures have been taken to study the water rich and water blocking characteristics in the overlying strata,and then demonstrate the possibility of sand control safety coal (rock) column in the working face,field measurement,empirical formula, numerical simulation and other measures are taken to expect the development height of “Two Zone”.The results show that the sand control safety coal (rock) column and large mining height of a fully mechanized can be used in the most area of 11020 working face, the area that borehole water inflow is higher than 15m3/h after dewatering should adopt the water control safety coal (rock) column,make use of the thickness of bedrock in this area to calculate the safe mining height.

In engineering background of Suan Cigou coal mine, this project firstly examines the strata behavior regularity in aspect of strong strata behaviors and large mining height fully mechanized caving face which has already heightened opening pressure of safety valve and has taken the measurement of goaf strip interbal coal wall, and then analyzes stent adaptability. Specifically, this project initially monitors the working face in perspective of working resistance of support and strata behavior. Through the theoretical calculation and actual measurement analysis, the roof structure model of working face and the measured strata behavior regularity could be subsequently obtained. At last, from the aspects of working resistance of support, roof control result, roof control and support working state, this project verifies stent has well adaptability, which could satisfy the requirement of roof control.

In order to provide the basis for the design of the borehole drilling field in 1208 working face of Shuguang coal mine, study the height of two bands by using empirical formula and UDEC numerical simulation software. According to the study, the height of the fissured zone and fractured zone is 16m and 31m in 1208 working face. The borehole drilling field for mine gas extraction is designed according to the height of the two bands and applied to the practice. According to the observed data, the average gas volume fraction in No. 1 borehole drilling field is 39%, the gas concentration in 1208 working face and it’s material roadway is controlled in 1% by gas extraction in material roadway, the gas concentration is also controlled. The gas drainage results shows that design on borehole drilling field in 1208 working face is effective.

Aiming at higher capacity problem of Nansigou waste dump in Antaibao open-pit coal mine，Combined with the actual situation，the main factors which influence the stability and the landslide model of this dump were analyzed，drainage rock parameters optimization method and work procedures were introduced.At last.Through the optimization analysis,the minimum working flat width narrowed from 65 m to 60 m, the overall slope Angle increased by 17 ° to 19 °,and the displacement capacity increased by 50 million m3.the practical significance of this method in ensuring the safety of production、increasing the dump capacity and alleviating the dump pressure,etc. were instructed.

In order to solve the difficulties of long-distance driving face cooling, cooling costly questions are designed automatic cooling system. The system has two sets of refrigeration equipment “A”, “B”,”A” group of the cooling capacity of refrigeration equipment has been sent to an ordinary hair dryer boring head, group “B” refrigeration equipment cooling capacity by the modified general release in the roadway in duct. A set of devices always maintain the normal operation, group B only after refrigeration equipment turned on when the pedestrian roadway, this action by means of infrared body sensors, PLC and relay together. Practice shows: automatic cooling system safe and reliable operation, greatly improved the working environment of workers and reduce the cooling cost of inputs.

The current status of driving technology used in present explosion-proof diesel trackless tyred vehicles and battery trackless tyred vehicles are briefly introduced, and an underground explosion-proof electric-diesel hybrid trackless tyred vehicle is proposed based on the advantages and disadvantages of two trackless tyred vehicles. Furthermore, the driving system, structural components and operating principle of the hybrid trackless tyred vehicles are illustrated, and the view that explosion-proof electric-diesel hybrid trackless tyred vehicle will become the development tendency of underground trackless tyred vehicle is presented.

In view of the problems in traditional integrated automation system of coal mine such as less depth and insufficient data utilization and so on, this paper researched and developed a new coal mine information collaborative management control platform. It provided for data acquisition, transmission, storage, analysis and processing of several subsystems including security monitoring, production process control, security management, production scheduling by utilizing a layered architecture and domain-driven design methodology. It provided a practical and available assistant decision-making support on the basis of mining association rules. According to field use shows that it reduces the number of occurrences of the cost of production and a variety of security risks of accidents, improves the emergency rescue capacity, enhances productivity, and promotes the safe and efficient production of coal mining enterprises.

Based on the characteristics of many pipe layout on the simply supported beam in no. 4 downcast air and promotion shaft of Huangling no. 1 mine, the stress mechanics model of pipe locked beam, with hosting beam, and beam of supported the 90° elbow pipe which is under the condition of the single pipe layout in mine shaft was set up. This paper obtained the force formula which was single pipe to pipe locked beam, and hosting beam, and beam of supported the 90° elbow pipe, and calculated the acting force which was each pipe to the hosting beam in no. 4 downcast air and promotion shaft. The formula which was used to unify the stress analysis method of simply supported beam under the condition of the pipe in mine shaft provided the reference.

In order to research the forces in anchorage zone of the large cross section coal roadway under the effect of compound truss cable, basing on the prestress theory and neutral axis theory ,the advantages about compound truss cable in Xinyuan colliery west roadway are analysised with the help of FLAC numerical simulation software. The results show that prestress F decreases when the distance between compound truss cable and anchorage point x increases. Compared with ordinary bolt, cable support, the neutral axis of support system with prestress compound truss cable support is moved down, the scope of the tension zone is reduced, and the displacement roof and floor measured by FLAC simulation is reduced about 8%.

For the problem of complex process and poor effect of general grouting process, put forward layered grouting process , according to the slurry’s different diffusion ways, divide the surrounding rock into shallow zone and deep zone; along with the new double-fluid grouting material and tube combination, to achieve layered grouting process by a single hole, the same material grouting partitions, simplified the construction process. The results showed that: Layered grouting process divide the surrounding rock into shallow zone and deep zone by the boundary of complete vadose zone，for grouting way, shallow zone mainly belong to fill grouting, deep zone mainly belong to penetrate and fracture grouting; new grouting material has a large adjustment of properties, is benefit to achieve layered grouting process, equipment and technology, compared with ordinary grouting segment, the convergence of rib and roof-floor decrease to 33.8% and 30%, severe deformation position of the roadway in front of working face is reduced from 45m to 20m, the reinforcement effect is obvious.

Mine gas disaster?is?one of the major?factors?affecting?coal mine safety production,?gas pre-drainage?can effectively?release the gas?potential?in the coal seam,? the?nature of the change of coal itself,?achieve the goal of eliminating coal seam outburst danger area.In order to solve the problem of Da PingMine?Underground gas drainage borehole extraction concentration is low,the effect of non-compliance,?the sealing?quality is poor,this article introduces a new type of gas drainage hole sealing process, namely the coal powder borehole sealing technology pressure grouting hole sealing method, the hole sealing principle, method of sealing hole, hole sealing effect and hole sealing cost and so on are discussed. By polyurethane with Pacific mining active hole sealing process, the effect of hole sealing, sealing hole efficiency, workers labor intensity, etc have improved a lot，In the laboratory and the Da Ping Mine underground borehole, sealing grouting, gained good hole sealing effect, to improve mine gas extraction result provides a theoretical and technical support.

The design theory of frozen wall is the key of artificially ground freezing construction. The conventional elastic-plastic mechanical models are not suitable for frozen wall design in deep alluvium. Considering the effect of excavation length and the interaction between the frozen soil wall and its surrounding earth mass, the calculation models of deformation and thickness of finite-length frozen soil wall are developed based on the rheological theory of frozen soil and Hooke’s law of deviatoric tensor of equivalent stress-equivalent strain under tri-axial stress state. Combined with a shaft freezing engineering case, the influences of excavation length and duration of exposure on the calculation models are discussed. The results show that the reasonable construction speed is crucial to the safety of artificial freezing shaft sinking project. The analytical models have important theory meaning to the design theory of frozen wall in deep-buried clay layer.

In order to study the effectiveness of Dual-frequency Induced Polarization Ahead-detecting Technology (DIPAT) on the detection of collapse column geological structure hidden behind the excavation face, the paper introduced the method of building the induced polarization model of collapse column based on Simulink. On the basis of the feature of collapse column geological structure, the equivalent circuit simulation model was constructed, which led to the establishment of the induced polarization model. Then the model was connected with the simulation detection model based on DIPAT. Through the simulation detection, the resistivity and the PFE value curves of the model could be obtained. According to the consistency of the simulation detection results and the preinstalled parameters of the induced polarization model, the correctness of the simulation detection model could be proved, which provided a proper reference for the development of instrument based on DIPAT.

To improve the technology of padding construction of coal storage bunkers’ bottom structure, to extend the use of inflatable rubber mandrels, and to provide a reference for such constructions, this paper summarizes the experience about padding construction using inflatable rubber mandrels based on a project of Hulusu coal preparation plant in Inner Mongolia province, and introduces the key techniques, concrete measures and matters need attention during construction detailedly. It also analyzes the economic and social benefits. The results show that this technique has a remarkable superiority and a good feasibility.

According to the feature of roadway under the protection coal pillar of close-distance seams in the SI Ke-shu coalmine,Through the method of numerical simulation and orthogonal test,Firstly research the effect of bolt length,spacing to the deformation of roadway,The result showed that bolt length’s range is 110 and spacing’s range is 33,and secondly analyze the deformation of roadway to different anchor length,The results showed that when the anchor length increasing between 4.5m and 5.5m the deformation of roadway increases with the increase of anchor length,but otherwise when the anchor length outride 5.5m.

In order to ensure the safety of laying flexible mesh in last cutting stope of fully mechanized large cutting height face, we adopted the way of inserting rock bolt for laying mesh and rising winch for hanging mesh. Practice had proved that the method had the advantage of safety and reliability with high speed, and it created a new path for last cutting in fully mechanized large cutting height face.

according to the problems containing dated forcast methods, pointless control and a lack of technology system in prevention and control technologies against pressure bump in Xinzhouyao coal mine, based on pressure bump characters and regular patterns analysis, features and regularities were summarised, That rock burst occurred in adjacent air along the trough, the work surface, forward speed > prone to impact of 2 meters are prone to the impact and depth of the mining of 240m-350m; Through experimental analysis, in-situ stress measurement and field practice analysis, three points are obtained,coal seam with strong impact force, strong horizontal structure stress, and the muti-stress plused by mining. 55 prevention and control tecnologies was discovered, including a forcast system of five methods: drill, micro shake, mine pressure, electromagnectic, and full utilization, and a control system of five ways: release, break, protecting, prop and avoiding. The applications of Xinzhouyao mine rockburst occurrence by a decrease of 34 since 2009 to 4 in 2014, the treatment effect is significant.

Abstract First of all, the application mechanism and method of seismic CT technology are introduced. Then the rockburst risk index distribution figures can be gained by computer inversion method based on the field measured data combining with the rock burst tendency of B1+2 at level of +475m in the WuDong coal mine, from which it can show the high rate area of rock burst and the changing process of stress in the coal and rock mass as well as evaluate the effect of prevention measures for the rock burst. The results show that the CT technique of seismic wave can meet the field application requirements with the reliable results.

Coal wall mechanical environment of high cutting face in steeply dipping seam is complex, coal wall easily instability, in order to better prevent and control coal wall instability, it is urgent to gain a clear idea of coal wall mechanics and deformation features. Analyzing coal wall mechanics, deformation features of 25221 high cutting face in steeply dipping seam by field measurement, numerical calculation and theoretical analysis methods, results show that abutment pressure in space with asymmetrical arch shell affects high coal wall of steeply dipping seam and decreases gradually in the form of curve in face advancing direction; non uniformity leading abutment pressure leads to the asymmetric deformation of coal, the horizontal displacement value within about 0 to 13m range ahead the face shows middle> lower> upper, the performance of over 13m is middle> upper> lower, the value performance of over 14.48m is middle> lower> upper, middle has the maximum displacement and deformation value, coal wall instability rate of the central region is largest; mining height increases, the degree of the lead abutment pressure concentration, coal deformation, displacement and large deformation range will increase.

In order to solve the serious water inrush problems in Zhaogu 1st mine, in this paper, we predict the damage depth of 11111 working face floor through empirical formula, theoretical calculation and the numerical simulation software UDEC respectively, according to the hydrological and geological conditions. Evaluate the water inrush of aquifer L8, L2 and the Ordovician limestone by the water inrush coefficient method. Propose bottom grouting reinforcement scheme aiming at aquifer have a risk of water inrush, and evaluate the floor stability after grouting reinforcement. The results show that the floor damage depth is up to 24.05m when the 11111 face take fully mechanized, which is closed to the distance between L8 limestone aquifer and 21 coal seam; The working face face the danger of water inrush from L8 limestone aquifer, and the grouting reinforcement should be carried out before mining; After grouting reinforcement, the floor damage depth and the water inrush risk reduced obviously, which is of great significance to the safe and efficient mining of the working face. The changes of 11111 working face water inflow through the locale measurement show that, the maximum inflow of working face for the 44.6m3/h, with no water inrush accidents. In a word: the prediction and evaluation of grouting reinforcement scheme is accurate and reliable, the effect is obvious and has guiding significance to the working face safety mining prediction which have similar future .

In response to the characteristics of deep buried steeply dipping working face roadway such as large deformation and difficult to support, taken Chen Manzhuang coal mine panel 3402 as background, theoretical analysis, Udec2D software and fiber borehole observation were used to analysis factors that influence the roadway deformation. Meanwhile, based on the roof cracks developing, reason that caused frequently roof-fall accidents in upper-end of working face has been studied. The results indicated that high ground stress, well-developed parallel plane fracture in roof, well-developed vertical fracture in coalsides and surrounding mining are main reasons that cause the large deformation of roadway. The optimal section form of roadway is semicircle arch, echelon cross section is better compared with rectangle cross section. Affected by the large deformation of roadway, roof in the upper-end of working face was fractured before the excavation, which is the main reason roof-fall accidents happen frequently during the advancing of working face.

Coupling analysis was done based on reasonable classification of equipment and facilities related to gas explosion in coal mining, and getting the combination which is more likely to trigger a gas explosion accident. In order to find out the direct causes, another through analysis was done to the concrete effect classification. Furthermore, descending sort was formed according to the accident proportion. Finally, put forward a behavior control method based on accident causation “2-4” model.

To acquire the effective feature vectors and classification model for the coal-rock identification based on the working face of fully mechanized caving mining, the acoustic pressure signals of coal and rock were collected by the existing equipment and the designed collection program. By analyzing the acquired acoustic pressure signals in time domain, the feature vectors were acquired which were used as the input vectors of neural network. The principal component analysis method was used to reduce the correlation between time-domain characteristics and the dimensions of the input feature vectors of neural network. Then the BP neural network model was designed. By comparing the gradient descent method and Levenberg-Marquard method, the time consuming of LM training method is significantly less than the gradient descent method. The neural network based on the LM method combing with principal component analysis (PCA) obtains higher identification accuracy and consumes much less time than that not combing with PCA.

The article is based on cloud evaluation index system of coal enterprises gravimetric analysis, combined with credible cloud certification Index System Data Center Alliance, select the coal industry familiar with the five cloud storage service provider, for its 12 service indicators for research , statistics, analysis, and finally calculate the 5 cloud storage service quality scores and rankings. Creative cloud service quality idea and method to measure.

The paper introduced design procedure and the method of management information system in geo-hazards in Youyu County, the author completed the construction of the database by information method and developed management information system in geo-hazards of YouyuCouny. This management information system has functions of information browsing, query, statistics and disaster early warning, and it provided the necessary foundation for the construction of the early-warning and forecasting system of geo-hazards in YouyuCounty.

As a study area with Merlinmiao coal mine in Mu Us Desert, it is researched the relativity between NDVI with groundwater depth and Land surface temperature(LST), by calculating NDVI and LST, which is needed to established spatial data with the Landsat8 and groundwater depth data. It is shown that NDVI is weak positive correlation with groundwater depth table, but negative correlation with LST, when the depth of groundwater is less than 1m. The NDVI is weak negative correlation with groundwater depth table and negative correlation with LST, when the depth of groundwater is 1~2m.The NDVI has no correlation with groundwater depth table, which is negative correlation with LST, when the depth of groundwater is 2~5m. It is presented that ecology environment is the best when groundwater depth is 1~2m, which is obviously changed when the groundwater depth is over this range.

Muli Coalfield is rich in resources. Natural gas hydrates have become a hot research since natural gas hydrates were found in Sanlutian of Muli Coalfield in 2008. In order to the analysis of the relationship between formation of natural gas hydrates and coal bed, through field geological drilling and results analysis, combined with contrastive study of geological features and occurrence characteristics of natural gas hydrates in DK12-13, DK8-19 and DK4-24 drilling in the study area, the functions of the gas source, migration pathway, reservoir stratum of coal bed on the formation of natural gas hydrates are discussed. It is found that the formation of natural gas hydrates is genetically related to coal bed in Sanlutian.

This paper focused on problems of fluctuation in flotation effect and waste in flotation agents caused by inhomogeneous addition and difficulty in quantitative control in frother amount in Dongpang Coal Preparation Plant. In this study, octanol was mixed with an emulsifier and water in a certain proportion to form emulsified frother, and thus the emulsified frother could be added smoothly and quantitatively. The emulsified frother was also able to disperse better in pulp. The effects of emulsified frother were evaluated by the index of flotation with different agents’ dosage in flotation tests. The results indicated that emulsified octanol formed the oil-in-water emulsion, making it fully disperse in pulp. The coal slime separation was significantly improved by using emulsified frother. At fixed amount of octanol, the production rate of clean coal was increased by 13.75% with constant ash. At equivalent floatation index, the rate of fuel saving reached 25 ~ 30%.

Because there has been a dramatic increase in greenhouse gas (GHG) emissions from human activities in recent decades, the climate and environment can be getting worse. Therefore, the United Nations Framework Convention on Climate Change was created and a series of treaties were made to limit the amount of GHG emissions from various countries. The building sectorhas become the largest contributor of GHG emissionsaffecting the environment around the world. It is suggested that 30% to 40% of the total energy consumption comes from the building sector worldwide and this ratio is increasing continuously [2]. Consequently, the building industry from various countries has gradually recognized the importance of green or sustainable concept and embedded this ‘new idea’ into their construction projects. Green buildings (GB) are considered as a holistic method to mitigate climate change, protect both the environment and human health, sothey would certainly become an important development trend worldwide. However, at the current stage, the development and construction of GBhas encountered variousdifficultiesand challenges, which should be classified and tackled effectively. Only then will GB be developed in a good way.

Based on rigid-flex coupled multi-body system dynamics and Virtual Prototype Technology (VPT). A co-simulation platform was constructed with the softwares of Pro /Engineer, ADAMS, Matlab and ANSYS, and then a rigid-flex coupled virtual prototyping model of shearer with flex cutting unit planet carrier and haulage unit second planet carrier was built. Through dynamics simulation analysis results found out that the planet carriers’ weak link were in the integral key seat, and the cutting unit planet carrier mainly bearing bending moment while the haulage unit second planet carrier mainly bearing torsion moment. Haulage unit second planet carrier was optimized based on satisfied transmission ratio, concentric condition, equispaced condition, and adjacency condition. The optimized planet carrier’s strength and stiffness were improved through increasing solid material of weak link, reducing axial dimensions, increasing radial dimension, and changing bearings’ configuration form. At the same time, the shear’s service life was effectively extended.

Autonomous cutting control method of longitudinal roadheader was researched, which was one of the key technologies to realize autonomous cruising of tunneling equipments. The system was overall designed which had the functions of cutting trajectory planning，automatic cutting and load self-adaption cutting. The longitudinal roadheader was adopted as the object of the study and its control principle was introduced. The system was built by using PCC and power panel. The method of cutting trajectory planning was mainly studied. The relation between coal hardness, swaying speed of cutting arm and revolving speed of motor was analyzed in accordance with which the cutting environmental factor was modeled. Grid map of roadway section was built by using grid method. Cutting trajectory which avoided crashing the parting could be planned basing on the map. Cutting trajectory and automatic control flow was separately set according to cutting processes and degree of coal hardness. And the influence to cutting trajectory caused by roadheader body position and pose was finally analyzed. The above results showed that the system was set up initially and the other two key technologies and underground industrial tests need to be carried out.

This paper establish finite element model of explosion-proof manned vehicle , combined with driving cycle of explosion-proof manned vehicle, make statics analysis and modal analysis for body of explosion-proof manned vehicle. Sensitivity analysis of body structure provides the necessary data for body lightweight designing.On the basis of sensitivity analysis, determine the light body mass as the objective function, the thickness of the body parts as design variables, body torsional stiffness is less than required value as constraint conditions, to make the lightweight optimization design of car body, after the lightweight optimization design, body has reduced weight by 8.83%, and has achieved expected effect.

With the awareness of energy conservation and environmental protection constantly enhanced, the reliability and the lightweight design of the equipments used in coal mine had become hot issues and key technologies. At present in the area of the structural strength analysis of the underground dump truck, the pre-estimate of applied stress usually depend on human experience and simple calculation, which led to large deviation between the analysis result and the actual stress state of the truck-body. In the paper, the discrete element method was introduced into the finite element strength check. Depend on the establishment of coal material's discrete element model and the simulation of the material loaded process, the applied force of the truck body from coal material discrete element could be acquired. Then the finite element software could conduct coupling and strength checking under the obtained data. Through this method, the finite element model could be applied genuine and reliable forces, and the stress and the strain of tuck body could be figured out correctly. The more reliable truck hopper's stress state could be obtained by scale factor calculated. The improvement of underground dump truck design and the increasement of productive efficiency could be benefited from the research.