Celebrates the coal mine mine pit water treatment take the gate gram to stand as the backing, conducts the research to the mine pit water technology and the operation unit.Sinks in advance through the increase adjustment the pond and bi the water, adjusted the water volume not to be balanced, reduces following processing the load; The design high density labyrinth sloping plate is clear, arranges the side counter current, the elimination main suspension and the emulsified oil; Using “the PLC workstation + on position machine supervisory system” the pattern, guarantees the equipment steady safe operation.And tries after the implementation to move, the craft operation was simple, is advantageous for the movement to maintain and to manage, has achieved the sewage regeneration use process water water quality standard anticipated target.

Through analyzing the difference of size error and displacement characteristics and stress distribution of tunnel section between the elliptical arch and three centered arch by the theoretical calculation and numerical simulation method, in order to study the feasibility of elliptical arch instead of three centered arch section tunnel. Research shows that three centered arch and elliptical arch tunnel section size is far smaller than the error which required in the coal mine safety quality standardization assessment rating methods. The displacement characteristics of two kinds of roadway is basically the same. The elliptical arch section tunnel vertical stress and horizontal stress is smaller than three centered arch In the superficial roadway surrounding rock,but the stress of the elliptical arch section tunne is increased ratio bigger than three centered arch along the direction of deep surrounding rock. Therefore, it is feasible that elliptical arch section instead of three centered arch section tunnel.

The critical information collection and transmission system of hoist brake system is designed based on computer communication technology and automatic control technology to remote monitor the operating state of hoist brake system real-timely and improve the operation safety of lifting equipment.The overall structure of collection and transmission system which have C8051 micro-controller to be core is elaborated. The method of micro-controller controlling collecting multi-channel data acquisition of key signal and completing GPRS wireless network communication and data transmission via the serial port,the collected data will be processed and stored in the remote data system.Signal collecting and sending synchronization have been achieved by using C8051 micro-controller,the hoist brake parameter could be captured accurately which provides accurate data for remote monitoring and fault diagnosis system.

As an example of the second auxiliary shaft foundation in Zhangji, showing the process of design, in order to drawing the sections of foundations, by comparison the way of formula for solving with the method of CAD three dimensional drawing, that the use of CAD three dimensional drawing can more accurately and quickly draw the irregular foundations.

Based on BP neural network and configuration software MCGS remote monitoring, the use of industrial Ethernet to mine monitoring substation integrated together, this is compatible with a variety of communication protocols, overcome the station between the existing protocols are not standardized, and at the same time, improve the communication rate, improve the man machine interactive interface, and the personnel positioning, personnel safety inspection, staff attendance, industrial and mining large screen video monitoring system and IP phone effective layout, can through the replacement of the monitoring substation and part of communication lines, you can upgrade of the original gas monitoring system, in order to enhance the economic benefits of coal enterprises, saving cost and time, and maintenance.

For the study of freezing expansion speed of Cretaceous soft rock strata, in order to achieve the purpose of shaft excavation in advance. Through the study on the risk of four deep water hole and brine cooling gradient of soft rock strata in the Cretaceous, study concluded that: Asabu Minkong should be set carefully, and the prediction of shallow frozen wall to circle should use other methods to replace; the cretaceous soft rock freezing expansion rate of V presents the linear relationship with the way salt water cooling gradient T, linear regression equation V = -17.653T + 12.444;. And the research analysis puts experience value 25mm/d of the freezing expansion speed in soft rock strata of Cretaceous before ringing.

A bauxitic mudstone stratum was encountered during the construction of the air-return vertical shaft in Nianzigou coal mine. And the rock-mass swelling dramatically, which cause a great problem on the supporting method, under the influence of water inflow from the above shaft wall. Firstly, the grouting technique was used to sealing the inflow water; then, polystyrene foam board was utilized for decreasing the swelling deformation of the rock mass before casting the reinforced concrete shaft wall. By taking this composite supporting technology, the bauxitic mudstone stratum was passed rapidly, safely and economically, which explored an effective supporting method for shaft construction similarly.

According to the problems of thickness of coal seam, the fault development of the working face, big deformation of surrounding rock, the paper studied the deformation control countermeasure of roadway surrounding rock through testing the loose circle by peering instrument and numerical simulation software. The results showed that the length of anchors could not meet the supporting requirements because the range of loose circle was increasing constantly under the influence of complicated geological conditions after the excavation of roadway. The roadway deformation in the roof and two sides decreased about 42.0% and 38.2% compared with supporting by the original supporting scheme after that the anchors in the left and right sides of roadway were lengthened to 2.4m and 2.2m, the distance between two rows was reduced to 0.8m based on suspension theory. It could effective control the deformation of surrounding rock.

The rock cables were usually failure in large area in compound roof and dynamic pressure roadway. And the roadway must be repaired for several times, this would result in high costs and affect safety. For this problem, the rock cable failure mechanism was analyzed in this paper. It was shown that the main reason for rock cable failure is inadequate cable preload applied. The key factors which caused rock cable failure were studied by numerical simulation and laboratory tests, and the reasonable length of rock cable was proposed, the length is 4-6m. The field tests shows that reasonable rock cable preload can shorten rock cable length, and the supporting effect of roadway would be significantly improved.

The "three soft" coal mining permanently poor resistance to deformation of the throttle body, permanently throttle maintenance frequently, safety and security performance is low, the problem of short-cycle. Through on stone Hao coal mine permanent throttle history status of investigation, analysis has throttle deformation damage of features, proposed used "three spray two anchor a note pulp", and control deformation, and reserved space, for build permanent throttle of programme, to stone Hao coal mine a level north track transport lane for cases, will the sets programme application yú site for test, Wells xià test results showed that, permanent throttle deformation in security can controlled range, change has original of the insufficient, enhanced has mine safety of coefficient, Permanent damper construction on similar geological situation to have some reference valuegrouting injection" and control of deformation, room, etc to build permanent damper, changed the insufficiency, enhanced the mine production safety coefficient, accelerate the development of the coal mine.

Aiming at big mining deep coal mine threatened by high pressure water, the working face need to grouting reconstruction before mining, and the design of drilling generally uniform holes in the face of upper, middle and lower part, this way of designing the drilling has a large workload, low efficiency of faults. Through 3D electrical method for working face detection, delineating the rich water area, analysis the main fracture direction, determine the target area, to focus on grouting target area. When grouting is completed，the effort of grouting requires again to detect by the 3D electrical method ,the weak of grouting need to reinforce the floor, In order to meet safety requirements for mining. Tanking the mine caozhuang’ s face of 101002 threatened by water for example, through 3D electrical method for the face detection and grouting test，the working face was safety mining, the floor didn’t inrush water，this technology has a strong practicability and popularization.

Taken some working face with syncline structure and hard roof as an engineering example, time and space distribution regularity of mine tremors before two rock burst and their occurrence model were analysed and researched. Less mine tremors occured in the seam floor before ‘6.26’ rock burst. However, the crack of seam roof produced more mine tremors with larger energy. Dynamic load had played a leading role in this rock burst, which belonged to the dynamic load dominant mode. Mine tremors mainly distributed in the area of the syncline axis before ‘10.15’ rock burst. Dynamic load caused by the crack of seam roof has the triggered effect in this rock burst, which belonged to the static load dominant - dynamic load induced model. Compared to up trough, the down trough has smaller bending radius, larger curvature and higher stress concentration, in which occurred the ‘10.15’ rock burst. The study could provide important reference for the rock-burst internal mechanism exploring and micro-seismic monitoring and early warning of similar working face.

Based on “wongawilli ” coal mining method, raises a mechanized mining method of short-wall on the condition of extremely irregularly shape coal in continuous miner, and optimize the the processes of main transportation, cable technology, boardroom Ventilation and pedrail powered supports. The results of the study showed that:1)after the method of as Scraper conveyor transport auxiliary equipment of continuous transport in long distance (> 120 m) and change the move way of Belt rigid frame slide to roll, Single monthly footage raised from 192 meters to 363.5meters;2）pedrail powered support with the reasonable support resistanc can be moved with pressure and carry out effective uninterrupted temporary support for broken roof, Realize the safe operation;3) the artificial cable retracting instead to monorail type cable, reduce failure rate, improve the production efficiency;4）Negative pressure by continuous miner with dust bellows produce,formation of mining tunnel airflow, Can greatly improve the tunnel ventilation environment .

Abstract:According to the charcaters of overlying strata structure and failure in fully mechanized working face of extremely thick coal seam,and the disaster of pressure frame in CuiMu,the author analyzed the controllable and uncontrollable factors of crushing,proposed effective prevention techniques on the principle of optimizing the controllable factors and regulating uncoontrollable factors. The studies have shown that the factors cluding support resistance,setting load,support efficiency,roof water and the speed of working are particularly critical to the crushing preventionm,by increasing support resistance and setting load, optimizing support construction, accelerate the speed of face advance, weakening the impact of roof water can effectively prevent the occurrence of large crushing disaster incidents in extremely thick seam mining face .

In order to solve the problem of high dust concentration of rock drivage face, the flow field of far-absorption-near press(FANP) ventilation and dust removal was calculated by Fluent, and the influence law of pressure extraction ratio to distribution of dust concentration and wind flow. The results show that: reasonable pressure extraction ratio of rock drivage face is between 0.5 and 0.75. Using reasonable pressure extraction ratio in rock drivage face of the sixth mining area of Dongtan coal mine, dust concentration of the working face was reduced to less than 10 mg/m3, and achieved the desired goal.

In this paper, a drilling in geological exploration with the snake bone drill pipe, mainly used to remove outburst of seam in roof and floor, strong deflection drilling technology.Conventional drilling machines exist large radius of curvature, the effective extraction of coal hole length is limited, the drill pipe is a new kind of compact structure and reasonable design, can effectively extend the seam of coal geological exploration and drilling hole length with products.

The inspection of the corrosion damage situation of steel pipe truss structure with ball-welded joints was launched, corrosion depth of steel pipe and corrosion distribution was captured .According to inspection results, the capacity of bars was so significantly reduced that met the demand of capacity. the repair plan of using section increment and replace bars was put , Unloading and construction supervision control was be used. The dynamic characteristic of prerestorative and postrestorative steel pipe truss structure was tested by dynamic testing ,to offer reliable foundations for the assessment of strengthening effect

In order to further study on the failure mechanism of vertical shaft in loose strata, an industrial test has been carried out in loose strata around west breeze well in Dongtan Coal Mine and the Fiber Bragg Grating system was used to monitor the change of strain in loose strata. In addition, additional stress of shaft lining was calculated theoretically based on the theory of retaining wall and the criterion of shaft wall fracture model was built based on the fourth strength theory. Pumping water test shows that water reduction led to consolidation of clayey and increment of compressive stress in lower coal group aquifer, it also led to clayey be in a state of tension in middle coal group aquifer because that movement of clayey in middle coal group aquifer lags behind that in lower coal group aquifer. Supplying water test shows that for each 1000m3 water increase, there was 1.61με increased strain variation of the clayey, and with the increment of water, the compressive strain decreased obviously, which shows the clayey is heavily influenced by the change of flow; For calculating the additional stress of shaft, it is found that the angel between slip line and horizontal plane decreases with the loss of aquifer, which lead to increase in size of soil centrum, causing increment of additional stress of shaft.

To research the pressure bump dangerous level in deep mining area of No. 3 Hongyang coal mine, the influence factors were analyzed and ascertained according to the actual geological and production conditions of the mining area. The mining depth and the remaining coal pillar of 7# overlying coal seam are regarded as the key influence factors. The impact hazard index of divided mesh in mining area was calculated with comprehensive index method. According to the calculation result, the comprehensive index of geological influence factors is 0.65 which indicated moderate impact risk, and the maximum impact index of influence factors of mining condition is 0.83 which indicates strong impact risk. The impact hazard areas of the mining area is divided, and the areas influenced by key factors and igneous rock wall are at strong impact risk.

This article combined the two methods between flow method of gas drilling and drilling gas pressure drop method, by comparison site construction continuous observation and analysis of advanced testing and stress testing bore holes to determine the Zhu Jiadian No. 4 Seam coal seam drilling of the effective pumping discharge radius for thin seam gas drainage drilling layout and parameter optimization provides the basic parameters.

Abstract: Only rely on the deformation monitoring of surrounding rock can’t be evaluated whether roadway supporting load meets the requirements of single rock in the service life of roadway, and there are some limitations that the surrounding rock deformation monitoring to reflect the long-term stability of roadway. Using 2107 track trough as research object to study this security problem, based on the roadway deformation monitoring technology, the derivation of equations considering the time factor on the roadway deformation and anchor bolt (cable) support load, which The estimates amount of deformation in the service life of the roadway and that evaluates bolt (cable) support stability. The research results of this paper to estimate the amount of deformation of surrounding rock in the service period, to judge the supporting structure occur overload time, in order to eliminate hidden danger of support engineering, to formulate measures to gain the initiative response time.

Based on the summary of the assessment the development for underground coal mine in different period and according to the concept and connotation of “high-production and high-effect coal mine” and “safe and high-efficient coal mine”, this paper presents the connotation of safe, high-efficient and green underground coal mine and it’s assessment index system and an application example with real data from on underground coal mine is given to validate the feasibility of this assessment index system and method, thus provide the basis and the foundation for safe, high-efficient and green underground coal mines assessment.

A new intelligent prediction method was proposed for the problem of the insulation life prediction of the motor of mine submersible pump. The main influencing factors of the insulation life of the motor of mine submersible pump were analyzed, and the standard method of sample data was presented. Three main factors, such as voltage, temperature and water pressure, were used as the input parameters of the model, and the insulation life prediction model of the motor of mine submersible pump was established based on support vector regression. The simulation results of the practical application show that the model’s predicted life is in agreement with the measured lifetime and the error is small, so the model is reasonable and effective.

Mine support equipment is a complicated multiobjective optimization problem, the traditional method is very difficult to find the optimal solution. The paper built a new simple and intuitive framework for the multi-objective problem of multidisciplinary design optimization in parallel based on collaborative genetic algorithm, which can connect the various disciplines and the adaptation degree function can reflect mutual influence between disciplines. At the same time, as a basic algorithm, the cooperative genetic algorithm can also effectively avoid premature convergence and obtain optimal solution well distributed. Results are greatly improved compared with the traditional algorithm.v

Spontaneous combustion of residual coal likely occurs in the mined-out area, storage bunker, closed zone, etc, where the oxygen concentration is lower than that in the air, so the experiment of coal oxidation at low temperature was made to reveal the correlation between oxygen concentration and dynamic parameters of Jurassic coal from Yima mine oxidation at low temperature. The experiment revealed that slow oxidation regenerative period gradually extended with the oxygen concentration of the supplying gas reducing. But in the rapid oxidation stage, the apparent activation energy is hardly affected by oxygen concentration, and that the oxygen concentration 11.7% can be used as reference upper threshold in the process of Yima mine fire prevention.

In order to solve the selective crushing of middling coal，According to the difference hardness of intergrowth of coal with gangue and combined with the broken characteristics of different mechanical crushing.A new vertical crusher with two-stage crushing ,which coarse crushing section by impact crushing and fine crushing section by shear breaking,has been designed.The new vertical crusher and the SP 60×100 jaw crusher were used to crush fine middling coal,the crushing test and the effect of contrast test show that -0.5mm slime yield，concentrate ash and the total theory yield of clean coal are increasing as the falling of the upper limit of crushing.The new vertical crusher products compared with the jaw crusher products with lower slime yield,lower over grinding rate and higher total theory yield of clean coal at the same the upper limit of crushing.The total theory yield of clean coal can be increased by 4.09% and 3.01% at the upper limit of crushing of 6mm and 3mm,the new type of vertical crusher for coal crushing and selective feasibility and reliability.

This work studied caking index of Shendong Coal (SDC) mixed with different proportions direct coal liquefaction residue (DCLR) and the caking strength of mixture pyrolysis semi-coke. The results indicated that the caking index of the mixture increases with increasing DCLR proportion and decreasing DCLR particle size. With increasing DCLR proportion the caking strength of the mixture pyrolysis semi-coke increases first and then decreases. The caking strength of the semi-coke increased when the pyrolysis temperature increases and the DCLR particle size decreases. Scanning electron microscopy (SEM) showed that as DCLR proportion increases, the number of pores on the semi-coke surface increases, the size of pore became larger and stronger bonding is developed among coal particles.

Dust hazard and jet distance is short of domestic mainstream spraying machine problems encountered during the course of work. TSN/B1N dust-free spraying of new research and development success of the dust-free spraying and 500 meters long distance spray, well solve the above problems. This paper from the two aspects of the structure and parameters of the spraying machine is analyzed and designed. Through field application, the main technical indexes of the spraying machine to achieve the desired results.

The bidding system in the application of coal industry construction engineering market in China is being continuously perfect,but there are still many problems in coal industry in China, management and supervision mechanism in bidding of coal industry construction engineering in China need to be improved,law on public bidding is not sufficiently apply to coal industry construction engineering bidding process in China,construction bidding process behavior for each principal part lack standard,local protectionism interfere construction bidding result in China coal industry,bidding of coal industry construction engineering in china lack of scientific and perfect evaluation program.Therefore put forward strategies to solve the above problems,to sure a unified law enforcement and management actors,strengthen the legal awareness in the bidding activities of the various part involved in the industry,increase supervision of the actors,improve evaluat bid method,and establish a price formation mechanism of the building products which is the leading of the competitive market.

This study builds a comprehensive evaluation index system of material cost control basing on 10 large mines in Shenhua Shendong Coal Group. Through study their material cost history data by using the model of DEA-panels and the model of system clustering, this study evaluates objectively the material cost control efficiency of Shenhua Shendong Coal Group in different times and reveals the trend of the material cost control. The path and the results of this study are useful for making benchmark in coal industry and cost control.