In this paper, based on the analysis of the hyperbolic cone-shaped funnel design principles, the equation of equal-ratio shrinkage elliptic cone funnel equation of bunker was deduced, and the funnel height, angle and other parameters of the tangent formula were determined. Finally, the application methods and procedure were given, which have a greater significance for the design and construction of similar bunker in future.

Abstract：Based on granular mecanics, the friction resistance of guide materil groove of belt conveyor are created. It is important to determine total resistance, belt strength and the power of belt conveyor with longer guidete materil groove.

Abstract: Regarding the problems about deepening mining depth on both sides of Yaoqiao coal mine, centralizing its working place, increasingly demand of production air volume, and two ventilating shafts are unable to meet production needs, this thesis makes a comprehensive analysis and research about it based on the ventilation resistance determination of this mine, through using the MFIRE ventilation network technology management software on dynamic analog ventilating current to analyze its stability after the ventilation system is optimized. Result shows that the improved project is available. Furthermore, this argument can be used as a reference to the other similar mining case.

Abstract: Nowadays, the process of urbanization is developing fast, many old industrial buildings are torn down, the old industrial buildings are gradually fading out the stage of the urban space. As a part of the urban history and urban memory, the reconstruction of the old industrial buildings is not only have important social and historical values, but also have important practical values. This context mainly centers on the use of green technology in the process of old industrial buildings’ reconstruction.

To solve the supporting issues of rock drift located closely under island coal face, this paper made in-situ measurement on the thickness of broken rock zone in the main haulage drift of sixth mining district of Jushan Coal Mine, analyzed the influence of coal mining on the broken rock zone. Based on the supporting theory of broken rock zone, the cooperative support scheme with grouting, bolting and cabling was designed and applied to maintain the main haulage drift. The results showed that the thickness of the drift without support reached up to 2.0~2.7m, the roof will cave at anytime; while the displacements of the drift with support were only 117mm in vertical and 214mm in horizontal. The support technology successfully maintained the stability of the main haulage drift, which provided a useful experience for other rock drift located closely under island coal face.

The delayed deformation rule of mining induced roadway is researched by the method of on-site observation and numerical simulation, and roadway supporting design optimal study is carried out with its law, according to the mining condition of large mining height. The result shows that initial deformation zone ,severe deformation zone ,stable zone level-off ,stable zone are apparently classified by the delayed deformation of roadway retaining. Improving the strength of initial support throughout the bolt support technology in full section gateway, and secondary support of special zone ,such as severe deformation zone , exit of crosscut etc. ,is carried out , acquiring good effect in test of roadway retaining.

When the Shaft of Xin Yuan Coal mine had constructed to K3 limestone aquifer lower sandy mudstone,the Mine inrush water suddenly increased to 104m3/h, Causing flooding of meters, The analysis of water inrush from working face blasting induced fracture and K2 limestone water-bearing fractured conduction and let to The K2 limestone aquifer water directly to the supply of working face, In order to ensure the safe construction of air shaft, By comparison, decided to adopt the dynamic Grouting Technology, This paper analysed and calculated the grouting pad thickness, Grouting hole number and angle. After the measurement on grouting Amount of working face water inflow for 2.2m3/h ,To achieve the desired diffusion effect.

Taking 71 and 72 coal seams in Huaibei coal group Xutuan mine for engineering examples,according to it appearing splitting and merging,great changes of spacing,roof breakage under the goaf etc,this paper adopting such methods as field investigation，theoretical analysis,laboratory mechanic experiment,does some research and comes up with the effective control mode of broken roofs in working face,the floor destruction depth in 71 seam. This paper calculates the supports selection about the working face of 72 seam，and designs broken roof grouting parameters combining theory and practice. The roof control effect is concluded and the effective control mode of broken roofs in 72 seam,by comparing strata behavior in working face,the surface displacement of gateway etc. The safety and efficiency mining is achieved in similar working face.

The safety coal mining buried in thick loose bed and with specially thin bedrock roof is a key limited to high output and high efficiency of Shendong mining district. Combined with underground pressure’s observing datum of No.22614 face in Daliuta mine, the underground pressure’s behavior features in thin and thick bedrock roof are respectively studied,and the varing mechanism of underground pressure’s strength with the bedrock thickness’change based on underground pressure’s control theory was explored.The conclussions are as follows (1)weighting strength in which bedrock thickness become to thin is less than thick;(2)the sand rush or burst accicent occured easily in the aere of most thin bedrock roof;(3)the weighting strength of normal district before gradually become into thin bedrock roof is equal to one after thick bedrock roof;(4)the more thin the bedrock thickness,the less the weighting span,the greater the weighting strength;(5)compared with gradually becoming into thick bebrock roof,weighting span,its strength and its factors is less in thin one.

The bearing capacity of the bearing body is important in the process of coal mining backfilling. According to affecting filling body bearing capacity of factors, established the model, using the numerical simulation software FLAC, it is concluded that the bearing capacity of the bearing body is increasing as filling width and strength increasing and decreasing as filling height and mining depth increasing, which would have provided theoretical support to parameter selection of filling body.

The paper introduced general situation and equipment configuration of the 7m height cutting coal mining face, No. 25202 fully mechanized coal mining face in HongLiuLing coal mine. Based on the configuration, put forward its corresponding configuration scheme of transport equipment, and analyzed adaptability of gateway for transporting the hydraulic shield as whole, then made safe run measure of the main equipment for fast entering mine transportation. These ensured the transportation of 7m height cutting coal mining face equipment with fast and high efficiency.

Abstract: For coal mines that are in complex hydrological and geological conditions or face danger of flooding, the present drainage and waterproof system cannot function effectively to cope with the problems. In light of this, the author proposes that high power submersible pump can be employed in the underground mine drainage. The features and installation of the high power submersible pump are analysed and its automatic monitoring system is illustrated in the journal. In the last, the field application of the high power submersible pump proves that its underground drainage is effective, and has promotion and application value.

Based on the measured data for the height of water-flowing fractured zone of fully-mechanized sublevel caving face in Huating Chenjiagou coal mine, this paper conducts inversion calculation simulation on overburden failure law caused by fully mechanized sublevel caving in extremely thick coal seam with FLAC3D, which also conducts comparative analysis with the measured data ,and the result is: The overburden movement and failure formed “arch” support structure after fully-mechanized sublevel caving, and the compressive stress of arch foot was highly centralized;The developmental morphology of water flowing fractured zone was also approximate to arch style, fitting well with the actual measured height. In addition, this paper has also analyzed the displacement field,stress field and the distribution law of plastic failure zone of overburden strata in the process of underground extracting. And the results are able to provide reference for the further study on overburden failure law of fully-mechanized sublevel caving.

In order to study the plastic zone distribution rule of the surrounding rocks along the mine roadway after the roadway excavated, we first analyzed the stress distribution features of the surrounding rocks，and according to the Hoek-Brown strength criterion, the paper derived the theoretical formula for the plastic zone of rocks surrounding a roadway based on the results of surrounding rock stress. The paper analyzed the distribution features of the plastic zone under different tectonic stress, vertical pressure, m, s through the theoretical calculation, and compared with the numerical simulation, the paper obtained the evolution laws of plastic zone of the surrounding rocks, it provides some reference for the actual engineering.

Abstract: This paper mainly described the arrangement form, the establishing progress and the technical characteristics of the workface booster system, pressure balancing monitoring system, the response system for pressure balancing emergency and the monitoring system for pressure balancing safety to prevent the discharge of poisonous gas during the mining on the lower workface of short range seams. Therefore, the study of the technical application of pressure balancing mining on the lower workface of short range seams is of significant importance in terms of coal mine safety and productivity.

Taking rock burst one of dynamic disaster in mine as research object, through the analysis on characteristics of rock burst and area liable to rock burst, the viewpoint that stress- concentration phenomenon is ubiquitous in area liable to rock burst and the area is divided into three sections. Both malconformation of stress concentration and disturbance caused by method of trial of working are the starting condition of rock burst, and the localization of deformation is caused by malconformation of stress concentration. Agglomeration of elastic energy in coal and rock mass caused by malconformation of stress concentration will provide energy for rock burst. Both release of elastic energy is gradually accomplished and characteristics of stress equilibrium in state of rock stress are the key reasons of end of rock burst. A simplified mechanical model of rock burst is put forward, and all of characteristics of rock burst like starting condition, development conditions, stopping condition and localization of deformation can be explained by it.

The engineering background of this paper is upper 2 coal seam of HuangSha mine. By use of the force method of structural mechanics to analyze the first weighing interval of experimental work face. Through the establishment of the main roof-work face basic mechanical model, analyze the ultimate moment when main roof first collapse, obtained solving equation of the main roof caving interval l, conclusion that main roof caving interval is 22.4m. Offer forecast and theoretical support for the position selection of gas drainage roadway by use of elliptic paraboloid zone theory.

Lignite dehydration is a base prior to the use of lignite. Based on the theory and practice of microwave radiation drying, we have a study about lignite from eji, Inner Mongolia. We study how factors such as the drying time. coal particle size. Microwave power and Heating method can influence the dewatering upgradation of lignite. The results show that on the condition of drying time 5min, microwave power at 720W, coal particle size of 3 to 6, intermittent heating, the dehydration rate of the water content could be reached 64.10%.

This paper focus on the two kinds of running resistance coefficient of scraper conveyor. By analyzing a variety of factors affectting running resistance coefficient of the scraper chain and materials (coal),this paper Proposes a testing and caculating method of running resistance coefficient. In addition, substituting the Linear function of the kinds of running coefficient into the Computational model of scraper conveyor, this paper can gets the power and safety factor curves of Conveyor. Through analysing the curves,getting the working conditions under different running resistance coefficient,the result will help production and contributes improving equipment systems.

The metal magnetic memory method is applied to welding seam detection of hydraulic powered support technology, the paper brief introduces the detection principle of metal magnetic memory technology, the paper introduced the design thought and realizing method from two aspects of hardware and software Respectively, and focuses on the analysis of software design and data processing method, through the field experiment shows that the metal magnetic memory testing method can effectively detect quality of hydraulic powered support welding seam, the paper solves the problem of welding seam detection method of limitations and shortcomings.

SEA of coal mining carried out well in recent years, so far, the planning of more than 80 coal mining have prepared the environmental impact report, part of the findings to be adopted by the planning and approval departments,and to play an active role. However,the report is still pervasive problems,such as lack of macroscopic and depth, evaluation of ideas and methods is similar to EIA, affecting the guidance on the EIA of coal constrction project. So how to opening up the ideas and deepen the content of the evaluation is the key of the effectiveness of the SEA of coal mining. For these problems,this paper proposed some suggestions from the construction scale and timing,coal mine division, spatial layout, comprehensive utilization of resources, resident relocation.

After analyzing statistical properties of coal mine safety incidents in China, We apply POT-GPD model to estimate the distribution of coal mine safety risk. The results demonstrate that the tail of coal mine safety risk distribution is heavy, which is power-decreasing, and the probability of huge safety incidents occurring is not very small. It shows that the severity of coal mine safety risk still cannot be underestimated. We also find that the heavy-tailedness of coal mine safety incidents occurring from 2007 to 2011 becomes lower than that from 2003 to 2006, which implies that the current regulation of coal mine safety incidents is effective.

Roadway excavation damaged the original equilibrium of roadway surrounding rock, the original stress of roadway surrounding rock occurred secondary distribution, if the secondary stress exceeded strength limit of surrounding rock, the surrounding rock would generate instability destruction. Tunnel roof abscission layer monitor with multiple displacement points can conduct real-time monitoring for displacement of rock at different positions, and grasp the roadway dynamic information of surrounding rock in time, So according to specific circumstances, we can take remedial measures in time and adjust support parameters to ensure the mine production safety and efficient mining. The monitor formed by the mechanical deep point displacement amplifier and deep point displacement sensor, this paper focuses on design principles, specific implementation methods and scientific nature of the monitor, and describes its application in Cuncaota mine of shendong coal group.

Mine electrical locomotive speed controlling modified from traditional changing DC Resistance and DC Chopper to VVVF, realizing mine electric locomotive to have high-performance control, saving energy and improving traction operation. This paper is designed based on the Microchip 16-bit single-chip microcomputer dsPIC30F6010A mine locomotive traction control system, providing the control system hardware and software implementation scheme and circuit structure. The experiment indicates that the traction control system meet operation requirements of the mine electrical locomotives AC variable speed.

Coal spontaneous combustion is one of the severest disasters in coal mine. It will not only cause economic losses but also lead to potential dangers in the process of safety production in coal mine. Coal spontaneous combustion occurs frequently in goaf regions. Thus the corresponding early prediction becomes very important for the coal mine. According to the characteristics of the goaf region, the automatic temperature monitoring employing temperature sensor in the goaf region is the preferred approach now. On the basis of the ZigBee system monitoring the temperature of goaf, this paper presented the wireless Ad-hoc temperature measurement system adopted in goaf. The experimental results show that the system could operate well and monitor automatically large range of temperature values during long-time working period for the purpose of early prediction of coal spontaneous combustion.

Based on the example of SHDSL device embedded system, the essay has illuminated the designed idea of the network driver. It has fully explained the design procedure of network module by using of the SCC controller of MPC850DE.In order to optimize embedded system, the module has been loaded into kernel space dynamically. In fact, the HDLC channel provides data link between Ethernet and communication network, which is the key point of the designing this operation system.

Based on thorough study why EAM system in many enterprises can't successful implementation,combining the characteristics of the coal enterprises, from three aspects (goal setting, key factors grasp and critical process follow) to analyze the necessary conditions of successful implementation of the EAM system in the coal enterprise.

The article is mainly on appraisement the risks of Thar coal-field exploitation in Pakistan,Based on Pakistan investment condition of society,economy,energy,Natural circumstance,and geology,etc,.it make an analysis of the country energy investing risks.The paper distinguish Main factors which are relevant to investment,analysize the level of these factors,estabishes a mathematics model of relevant factors,then duduce to a result of risks level by the means of AHP and fuzzy comprehensive evluation,in the end,make an conclusion of suggestion.The study will be a reference material to Chinese energy Enterprises which are ready to invest Thar coalfield.

Taking different department employees’ safety knowledge of coal mine enterprise as research object, though frequency analysis, entropy method and evaluation matrix to ensure all failure mode’s rate. Final, present safety capability was obtained. Enterprise analysis safety of the existing staff ability to find out the weakness department, and provide the basis for enterprise’s safety input. Finally, though a example to proves the employees’ safety knowledge evaluation method is practical.