Because of the complicated geological conditions of No.3801 of Shuiliandong coal mine, How to determine the rational section coal pillar of its fully mechanized top coal caving mining face is one of the engineering problems. The lateral stress distribution and deformation of entity coal along next goaf for fully-mechanized face obtained by online observation on lateral stress field and displacement field of the front and back of the stope. The lateral stress distribution of entity coal along next goaf for fully-mechanized face of different size of the coal pillars obtained by numerical simulation. The rational size of the coal pillars obtained by comprehensive analysis. The research result will provide some scientific references for preserving reasonable coal pillar for the similar extra-thick and hard mine coals.

In accordance with the Characteristic of fire-fighting equipment and fire-accidents happens frequently, this paper analyzes the development status of the automatic inspection system of fire-fighting equipment and introduces requirement for setting of automatic inspection system of fire fighting equipment, and expounds its working process through an engineering project.

According to the poor seam permeability, the low efficiency of gas extraction and large construction of drilling in Daxing Coal Mining, technique of hydraulic fracturing for enhancement of permeability was offered. The paper studied the mechanism of hydraulic fracturing to increase seam permeability, and analyzed its process. Union fundamental research and scene experience, carried out the seal of high-pressure drilling, determined the technological parameter, completed the scene implementation. After the implementation of hydraulic fracturing, apply effect showed that hydraulic fracture bores and the the gas drainage bores in its zone effected both kept a high level of gas drainage and exploition , the amount of gas extraction of hydraulic fracture bores was increased by 7.2 times, gas permeability coefficient of coal seam in the zone effected was increased by 79~272 times.

The vertical distance between 3-101 haulage way crossing from the bottom side of the 2# coal section pillar to the other side in Beiyu Coal Mine and the stage coal pilla is only 1.0~3.5m。2# coal section pillar is 18m wide。In two sides of haulage way，relative displacement reached 2m or so for stress concentration issuing from section coal pilla，and the sides coal was broken heavily。Aiming at this condition，we proposed the repair and reinforcement technology based on analysing the roadway deformation and damage reasons。This technology adopts water swelling blot to support the two sides broken coal and uses high-strength twist steel bolt and anchor rope to reinforce roof。The practice showed that this technology can make coal in the anchorage zones form the whole bearing structure，and roof form composite beam bearing structure，connecting with deep rock。Therefore，the roadway deformation was controlled effectively，the obvious technology and economic benefits achieved。

, The paper analyzes the stability and strength on the basis of the structure and weight of the （Tower) barrel, it then selects the proper mast, winch, steel wirerope, rings and other tools, which successively hoists, assemblies, welds, fixs each section of （Tower) barrel from top to the bottom to realizes the hoisting of the large （Tower) barrel in the limited working condition.

The short distance underlying seam mining tunnel arrangement form is deciding the working surface in the entire stopping period tunnel supports and protections difficulty degree. This article unifies Cao Cunkuang the concrete geological condition, actual tunnel respectively be in wrong, overlap, outside wrong three kind of arrangement way distortion situation, analyzes in each kind of situation the tunnel distortion rule, the proper attention to both coal damages the question, to raise the recovery ratio the factor, the definite lower position coal bed working surface tunnel's reasonable arrangement way, causes the tunnel as far as possible at stopping period easy to maintain.

Of an impact geostatic pressure coal mine depth portion mining mine pit main disasters, highly effective and the personal security has had the serious influence to the mine pit high production. In order to further find out the omen information which the impact geostatic pressure occurs, based on the ARES-5/E sound monitor system in the domestic coal mine popularization application, introduced this system monitor forecast principle, the sound detector arrangement way, has studied the sound monitor and the microseism monitor, in the impact geostatic pressure forecast real-time and the short-time forecast technical superiority. Through to the place sound monitor monitor result data statistical analysis, had reflected the coal rock mass picks when the stope moves, the overburden movement, the coal rock layer micro breakage degree, is destructed the energy liberation process. The monitor result indicated that,The sound monitor can to attack the function which the event the occurrence forecast ahead of time, the sound monitor technology field use, as well as with the microseism monitor technology union application, will become the impact danger to forecast will forecast a more effective method.

The vertical depth in Suncun mine has reached 1 350m at present, with the increase of mining depth, the typical contradictions of deep mines become evident, just like the long production lines, excessive transportation links, complicated systems and auxiliary transportations. In order to solve the backwardness of the traditional mine auxiliary transportation technology and equipments which would restrict the construction and development of the safety and high efficient mine, based on the actual production technology conditions of Suncun mine, optimizing the mine auxiliary transportation system: On the one hand, the main production system and mine development layout was optimized, the arrangement mode of the mine roadway was reformed and the auxiliary transportation system was simplified in order to create the conditions to promote and apply the high efficient auxiliary transportation technology and equipments; On the other hand, auxiliary transportation equipments for the research, development, test and promotion, after implementation the level of the auxiliary transportation mechanization in special-deep coal mine has greatly promoted, achieved the intrinsically safe transportation and got technical and economic benefits very well; at the same time, provided technical theory and practical experience of auxiliary transportation system optimization for other similar mines.

this paper introduces several control hydraulic support measures to increase hinge joint hole, in order to avoid hydraulic support for joint pin hole increases, and make the components, and stress condition to premature stent scrap.

Abstract：In the area where the Hydrogeology conditions are complex and detection conditions are constrained .The correct choice of geophysical techniques, can more accurately, more convenient to achieve purpose, and directing the mine production scientifically. The DC method is a effective way to detect the contain (guide) water Structure and the water area.Through comparison，it is showed that the measured results by using the DC electrical prospecting instrument are in accordance with the the site condition . Since the DC method has the characteristics of low cost and high efficiency ,it has a good application prospect in the hydrogeologieal exploration and water disaster control of mines．

Based on today's domestic and foreign mining technology analysis of gobbing, filling of waste gypsum as research foundation, starting to analyze waste rock filling materials of physico-chemical parameters, as well as its role in the effect of paste filling, grading and filling materials , and a detailed analysis of filling body temperature and other aspects of concentration, summed up the waste rock intensity influencing factors ,and to provide a reference paste filling for the modern mining technology.

On the basis of comprehensive analysis on the sources of gas and the law of methane emission at NO. 1321 isolated face and，in view of the site actual situation at the mining face，a series of effective prevention and control technology for gas are adopted，realizing the safe mining at NO. 1321 isolated working face.

By analysing draining effect of the the original magnetic medium recovery system in coal separating plant of our company and shortage of original design, we took measures and achieved ideal result. The medium comsumption of no desliming made raw coal costing reduce from 3.7Kg per ton raw coal to 0.6Kg per ton raw coal when granularity of 0.5mm undersize reached 20％ and 13mm undersize reached 99％. The processing costs can be reduced by 5.256 million yuan each year . Finally, decline of medium containsed in final product makes clean coal yield increase by 1%. This technique will add 10.8 million yuan to economic benefits and 16.056 million yuan to integrated benefits each year .

Scientized mining of coal resource is the basic requirement and the foundation of the harmonious development of human and society. Due to the current evaluation on scientized mining is still in the qualitative phase, it is difficult to express accurately the scientized mining level in coal enterprise. This paper presented scientized mining coefficient (ScMC), and constructed evaluation index system that composed from 5 first grade indexes, 33 level two indexes and 64 level three indexes, separately for each evaluation index to establish a quantitative function, ah the same time, it used multiple expert back-to-back empowering subjective dynamic weighting method to construct the mathematical model. It detailed the calculating and forming process of scientized mining coefficient by citing a specific example.

This paper applies the method of ARIMA model to predict China's gross energy (fossil energy) consumption. We use PASW statistics18 software modules to predict total energy consumption in 1978-2010 for time-series analysis in China, and then to predict the total energy consumption of China's “Twelfth Five-Year Plan” period and give the relevant recommendations based on the predicted results.

On the basis of field investigation, the process of coal roadway mine excavation is divided into 13 time cell. The "time analysis algorithm "is constructed to analysis the "efficiency and effect" about coal roadway excavation process, according to constructing proportion of time cell and analyzing the logical relation of the proportions. After building the "time analysis " in detail , applying this method to transversally analysis A B C coal mine data of a certain mining company group, taking the longitudinal analysis the front data of coal mine B and the data after taking targeted measure about the problem come up in it. The results showed that: horizontal analysis of the results corresponds with the actual situation and longitudinal analysis result is the degree of the improvement to each index after measures are taken. It indicates that the method is suitable for the analysis of "efficiency and effectiveness" analysis in the process of coal roadway excavation work.

According the analysis foundation of the jointing tension or presses the different condition, uses the stress adjustment jiont to open, the strain control jiont closed criterion separately, has established the double jointing rock slope model which using the abaqus software, the rock mass contains two sets of planes of weakness: one vertical set of joints and one set of inclined joints. and has carried on the simulation analysis to this jointing rock s slope's stability. Through this method to the jointing rock slope slide process's simulation, obtained the slope body's slipping failure plane intuitively, had proven the jointing controls the primary factor which the rock slope destroys. Forms the mechanism regarding the understanding slope's destruction to have the important meaning. Which explained that this criterion can forecast accurately the jointing rock slope latent failure plane’s shape and position, may provide the corresponding theory regarding the complex rock slope stability analyses.

In order to improve the speed and accuracy of the calculation of effective drainage radius of drilling, study No.7 coal seam of Wolonghu Mine. Summarizes the existing determination of gas effective drainage radius, analysis of the process gas flow are stress, deformation and gas flow field of dynamic gas-solid coupling process. Proposed by using COMSOL simulation software to calculate the effective drainage radius as the extraction method. Based on linear flow model - Darcy's law, the establishment of the gas flow equation. The gas flow stress and displacement boundary conditions were set. The gas pressure, gas content, gas flow rate, gas permeability coefficient and gas extraction negative pressure of the field parameters are using for the numerical calculations. The results showed that: the new method is quick and easy compared to the traditional method.

Rely on the maintenance test project of main haulage in Wei Jiadi coal mine，the calculation model is built consistent to actual supporting design using Flac3d numerical simulation software . Making analysis combined with field monitoring data could get a result that it is adapt to the denaturation features of three soft coal seam using the reserve soft cushion and relief pressure combined support technology based on first supporting of bolt-mesh-spurting + bolt-grouting. The field tests showed that this maintenance supporting scheme is feasible and it ensured surrounding rock stability on main haulage roadway, met the requirements of safety production in Wei Jiadi coal mine, and the reserve soft cushion and relief pressure combined support technology proposed in this project has certain reference value for similar projects.

Abstract: The asymmetric deformation characteristics of surrounding rock after excavating and supporting of roadway within steep coal seam, used the methods such as engineering geological investigation, numerical simulation and theoretic analysis，the asymmetry of deformation-failure of roadway in steep coal seam is summarized, which presents the mutual rupture deformation characteristics with "bottom uplift, roof decline” and causes the bearing load to the supporting structure asymmetric. Based on the research result , The bolt, steel mesh and anchor combined support under asymmetric loads is proposed, the purpose of controlling the stability of the surrounding rock of roadway is achieved by non-symmetrical layout and mutual performance couple between the bolt, steel mesh and anchor combined support. Through engineering applications, it is demonstrated that the intense deformation of surrounding rock of roadway is controlled effectively and the safety of roadway is greatly improved by the strategy of asymmetric.

Landfill is the main means of solid waste treatment in our country at present and impervious layer will leakage different extent in the laying time. In this paper we using the transmission line model for the simulation research. Firstly, potential distribution contrast for has the hole or not. Secondly, from transmit frequency and transmission line spacing for the influence of potential distribution, use comsol to simulated. The results shows, the smaller cable spacing, the higher frequency, the more obvious detection effect.

The flow field in the thermal flow-reversal reactor was numerically simulated with the Computational Fluid Dynamics (CFD). The effects of the shape, length, number and installation way of guide plates on the flow uniformity were investigated. The simulation results show that the open end of guide plate is more helpful to improve flow uniformity than closed end; the flow field is most uniform with the curved guide plate than trapezoidal one and straight one; the flow uniformity is better with longer guide plate, so the entire-length plate is adopted; the velocity fluctuation is controlled better with more guide plates, which results in better flow uniformity.

The employees' unsafe behavior is the direct reason which leading to accidents in coalmine, and the factors which influence the chose of the employees' unsafe behaviors are studied from the perspective of the employees behavior process in the paper. Then the comprehensive prevention and control model of employees' unsafe behaviors is provided based on the conception of the risk pre-control and management which include risk pre-prevision, risk pre-suppose, risk pre-control risk early-warning and aided management, it will be a great value for the further study of safety management problems about behaviors in coalmine.

This paper introduces the situation of detection and inspection technique for the hydraulic support , and discusses future development of detection and inspection technique for the hydraulic support .with the development and consummation of detection and inspection technique for the hydraulic support, it will certainly provide powerful technical support and reliable safeguard for the hydraulic support design, manufacture and application.

Based on the discussion about the equipment matching of fully mechanized coal face，the equipment matching of armored face conveyor is analyzed. The design strategy and design technique of armored face conveyor are proposed. And it is explained by giving examples. It can be referred by the engineers.

Load sensing hydraulic system working principle for GDY-2000L engineering drilling rig was introduced and AMESim software was used to establish models and simulation on load sensing control valve , pressure limiter valve and the whole hydraulic system, system pressure self-adaptation was analyzed in detailed, the knowing of GDY-2000L engineering load sensing hydraulic system was raised and summarized, it can be a reference for hydraulic system design and AMESim simulation practice.

This paper submits the reporting data system using LED electronic screen and computer technology to realize the data collection, transmission and site display in order to solve the problems of lower efficiency, slower speed, the worse usability and higher misdescription based on the present production data transmission model of telephone contact. The application in Coal Preparation Plant shows that this system is worth promoting to widely use in consideration of the high automation, the accurate, reliable and timely data transmission, and the helpful value to manage the production and operate the equipment.

The paper discusses the current advance of study and existing problems on early warning and forecast system of coal mine hazard, and the space information technology of WebGIS was applied in early warning and forecast system of coal mine hazard, the paper analyzes the process of building prediction evaluation and an early warning and forecast of coal mine hazard, the structure of system was constructed based on multi system architecture ,the key technology of design was elaborated deeply on early warning and forecast system of coal mine hazard based on WebGIS, a new access of early warning and forecast was opened for coal mine hazard.

China is the biggest coal production and consumption country.The coal makes the very improtant effecet in the economy development,but also exicting the level low geological exploration, complex mining tecnology condition and unequilibrium resource distribution which make the low recovery rate of the resources.Improving the recovery rate makes the sense for the coal industry and the economy.According to the investigation of more than 200 coal mine design,we analysis the resean of the resource loss, account for the character of different disticton and the improving measures of the recovery rate of the resources.

With China’s enter into WTO, Chinese coal enterprises are facing great challenges. Therefore, strengthening the logistic constructions of the coal enterprises to lower the cost, improve efficiency and prompt international competition ability has increasingly become the main concern of this area. This paper will focus on how to strengthen the logistic constructions based on the background of logistic constructions of the coal enterprises.

Abstract: This paper establish a CGE model highlighted fossil energy and clean energy sector, as well as dioxide emissions. The model analysis the carbon tax policies how to impact the on energy use and dioxide emissions in the course of the development of low-carbon economy in China. The results show that the carbon tax rate by price of the fossil energies will gradually increase and the highest rate is coal with the emission reduction increases; the energies consumption will fall with the volume of dioxide emissions gradually increase, the largest percentage is coal, but not a of thermal power is not a large drop, the low-carbon energy consumption basically remains unchanged; the main task of dioxide emission reduction is in coal energy.