With the increasing depth of mine well, deep soft rock chamber group stability control has become a troubled engineering problems at home and abroad. In order to better control the large section chamber group damage problems, combining the four levels of Hegang Mining Xing'an mine wells pump suction chamber group of large section engineering example, through on-site investigation and theoretical analysis, the destruction main factors of Xing'an mine pump suction wells of large section chamber group was obtained. Based on these factors, the supporting technology of anchor net spray + Anchor + corner bolt is put forward, and has been verified in the project.

In order to ensure the security and stability of the auxiliary transport system of wind-lane under complicated geological conditions, the type of SQ-80/75B without pole line winch is used in auxiliary transportation in accordance with the actual conditions of the 13th Coal Mine of Pingdingshan Coal Industry Group. Through Comparison and analysis of the working principle use and maintenance of the winch, and improvement of the tail wheel, main and vice pressure pulley and relational system in practice, further exploration was made that of the superiority to Phase winch in complicated geological conditions, as well as the results in production practice. Practice has proved that this type winch have the benefits of less capital investment, safety and easy to control, good maintenance. Therefore, it is of great value and importance to the method of auxiliary transport in complicated geological conditions in the coal face.

Abstract: in the "three soft" coal mining sector in large dip Angle, using mechanized mining, special rotating technology successfully avoided fully-mechanized once removed and installation, for the future use of irregular fan rotation mining summarizes the success experience, has received the obvious benefits

Abstract: Based on the systematic analysis of geologic structural features in Suxian and Linghuan mining area, according to the structural complexity and differences of different regions, Suxian and Linghuan mining area was divided into three structure areas: the structure intensity area, the structure stacking area and the structure normal area, characteristics of the coal seam gas occurrence and coal and gas outburst in each structure area was elaborated in detail. That the geological structure plays an important role in controlling the gas disaster was revealed. research results has a positive guiding significance for coal mine gas disaster prevention.

Abstract：A Frequency Control System protective device based on TMS320F2812 integrates several protections into traditional motor protective device to diagnose and protect the Frequency Control System failures．This device solved the contradictions of the speed response between the traditional protection devices and protection algorithm,and much more real-time performance. Experiments show that the device can be good protection for Frequency Control System.

In the low hilly area of midwest of Henan, rural residential areas are relatively small and loose. Exploit the coal resources under these areas, i.e. set the village protective coal pillar, would occupy a large amount of coal resources, especially when the burial depth is relatively deep, if still set the protective coal pillar based on shallow coal seam exploitation rock and surface movement index, more “Three Under” coal would be occupied. The application of stepwise mining technique to coal exploitation under loose village distribution would effectively control surface ground distortion, reduce the damage to surface building, and would have practical significance to effectively improve coal exploitation rate and reduce coal exploitation cost.

By analyzing the stress change in coal seam after used Drilling and Slotting through rock Integration technology, pointed out that the drilling and cutting through rock integration technology in coal is an important means of pressure relief. using flac software analysis of the effects on the overall relief by the stress change between the 5m and 10m layout style. Results indicate 10m layout style compared to 5m layout style for the early gas extraction has more valuable. With 10m layout style，the relief strength reduced, but with a wide range of pressure relief, single-hole high utilization, large effective sphere of influence, and so on. Practical Application of 10m layout style, single-hole gas flow increased 3-6 times, while gas extraction time reduce to half gas content can meet the 8m3/t of mining conditions, it has provided a guarantee conditions for mine safety.

This paper describes the design and achievement of mining environmental decision support information using GIS. By adopting SQL Server 2000 and SuperMap Objects 5.3 combined with relevant program languages, the system is achieved. It discusses the system’s construction, system function, realization of technology of system. It realizes the seamless integrate between the special spatial data and the attribute-data. It offers effective support for managements and visualization of data about mining environmental information, decision support of the coal management department.

Modern conveyor is developing in the direction of long-distance, large capacity, high speed and efficiency, leading to the severity of the longitudinal rip of conveyor belt is relatively conspicuous. There are problems and shortcomings in the various monitoring devices. This paper aims at a new type monitor to monitor longitudinal tear of conveyor belt achieving the target of monitoring and controlling on the longitudinal tear. The monitor is designed by sensors, SCM and other hardware, based on the reliability of the system theory, theory of operation of the belt conveyor and monitoring technology, signal processing analysis technology and so on.

Clean silt of Coal Mine Sump has always adopted the method of manual work. It’s badly influenced and restricted the coal mine security and production. This text analyze the issue of the original techincs of cleaning silt and then systemic introduce a new dredging method of independent innovation and a combination traditional craftsmanship and modern technology for coal mine water storage. This text includes Basic principles, dredging technology and method. To clarify the technical advantages of the new method. Practice has proved that this method advanced technology, dredging effective and efficient. It reduce the labor intensity of workers and ensure the safety of mine production needs.

Because of the applicability, high-pressure spray device is widely used in the coal face. Considering that present high pressure spray equipments used in fully-mechanized face are very huge, inconvenient, expensive, fragile and of poor effect, it is subject to many restrictions on field applications. In response to these shortcomings, a new high pressure filtering external spraying system was developed. The system comprises booster pump, water filtering system, pressure reducing valve and shearer onboard high pressure spraying equipment. By laboratory testing, the proper working parameter was: pressure 4MPa, water flow 12.24L/min, valid range 2.85m and maximum range 3.8m. According to these parameters, the appropriate field-testing face was selected to carry out the field test, and the total dust removal efficiency at 10m below mining driver was up to 98%, respirable dust removal efficiency at 10m below mining driver was up to 75%. By comparing the removal efficiency before installing this system, it was indicated that the removal effect after installing was significant. The good effect indicates that the system can inhibit dust concentration effectively, improve sanitary conditions of underground mining working face significantly, which is worth popularizing.

Chaos effect existing universally in dynamics of water yield in complex mine especially in deep coal mine was very difficult to predict from common methods. The multiplicate factors mechanism resulting on the chaos effect included the change of groundwater system structure，more yielded resource and the evolvement of mine groundwater system to nonlinear dissipation system etc. were set forth in the paper.And a case study was proved very effectively to predict the dynamics of water yield in complex mine by using RBF nerve network and CAO methods.

Li Dian mine of the shanxi province is chosen as the study object with the characteristic of" High Efficiency", Based on actual data collected and measured in Li Dian mine, the gas emission of north and south is gained through the introduction of the sub-source prediction algorithm,which provid the theoretical basis data to the design of mine ventilation and gas extraction.In addition,according to the characteristics of high efficiency gas emission, the sub-source prediction method is improved and developed through the introduction of the loss rate of residual gas content when coal transportation to the surface.

In light of the geological conditions and mining technology of mining gateway in Shanxi Fuyan mine，bolt-mesh-steel joist and prestressed anchor cable support method was adopted to meet the purpose of use requirements and cutting cost. Using theoretical arithmetic and ABAQUS numerical simulation analysis to ensure the rationality of the supporting design. With the reasonable theory and by using the right calculation，the parameters of the bolt-mesh-steel are got. Thereby，it can provide a reasonable theoretical support and calculation process for the similar bolt-mesh-steel gateways.

Based on the collected information about the gas outburst and the measuring of the parameters of the 21030 coal working face of LiangBei Coal Mine, using the Langmuir equation calculated of gas pressure in this working face. Base on considering of the coal structure and coal seam gas parameters，According to coal and gas outburst forecast Sensitive Index and the critical value, the working face Coal and gas outburst fatalness for predicted. The results show that, Have coal and gas outburst hazard in 21030 working face.

There is a misunderstanding in fixing the rapid floation index which is an important index in the production of the coal preparation plant .And the methods used now are not scientific too . Due to this, a much more reasonable method has been given in this passage .

Thesis mainly analyses the production means of hydraulic oil pollution and the influence of hydraulic system to the coal products, and the malfunction phenomena of the coal products. Finally it gives the measures to reduce the hydraulic oil pollution and enhance the reliability of the hydraulic system.

The paper summarized the study and application status of oversize cage .Based on the demands of the mine sites, the paper had an outlook the development direction and the problems to be solved of oversize cage. It is of important significance for the develop and application of oversize cage.

Abstract: In coalmine production, the balance of coal production-transport is one of the key factor to affect the entire production. Set the coal bunker is the main means to make the production capacity and transport balance. The difficulties which set coal bunker to improve reliability of coal transport system balance in underground production management had been analyzed by using quantitative analysis. This method is based on the specific circumstances in current coal production. Reliability analysis model of the underground production-transport system balance had been investigated and established. Calculating formula of system availability had been founded by derivation, and contribution by allocating coal bunker to the production-transport balance system had been analyzed. Rational and simple methods to the reliability analysis of improving the underground coal production-transport balance system had been offered.

Base on the observation data of the surface ground subsidence. Using subsidence observations of a mine in Yanzhou area, We use the method of wavelet denoising to filter the accumulation subsidence quantity, and use Fourier transform method to analyze the cycle of information of impact of land subsidence in the major cyclical factors.

The highly dispersed α–FeOOH and γ–FeOOH catalyst were prepared by sedimentation method. The particles surface, size and pore specific volume were analyzed in the same time, Compared with common Fe2O3, the catalysis for coal liquefaction were also studied. It was found that the particles of α–FeOOH catalyst forming columned, shortness fibrous crystal which is highly dispersed; the liquefaction catalysis indicate that the α–FeOOH and γ–FeOOH are better than that of common Fe2O3 catalyst being fewer addition and better catalysis. with addtion of 1.11%, the α–, γ–FeOOH catalyst has highly catalysis while the common Fe2O3 should be addtion of 3.00%, the order of liquefaction catalysis is α–FeOOH﹥γ–FeOOH﹥common Fe2O3, the effect of the α– and γ–FeOOH catalyst are promoting AS and PA convert into small molecule gases and liquefaction products.

The analysis of this article is based on the world economic crisis background, stated the associated national polices, discovered current management control problems in our coal mine industry, combine with the current situation of industry reconstruction. At last, the author centered on the factors which affect management control of stated-owned coal mine enterprise group, then gave the necessary advices combined with the practical cases.

In high-temperature air-conditioning system, the air supplied in different ways a has an important influence on the comfortable environment and reducing energy consumptionenergy .When using pulsating air supply mode, due to fluctuation of the airflow rate of air supply randomness, its acceleration is also constantly changing, therefore, have different densities of micro-groups obtained by the acceleration is also different. High temperature, humidity of the micro-groups, density, obtained by the acceleration of large; temperature is low, humidity, micro-small groups, density, obtained by the acceleration of small; so, pulsating air supply method allows different temperature and humidity of the micro - a strong mixing between the mission and improve air flow thermal diffusion coefficients and moisture diffusion coefficient, bulk wet cooling airflow to enhance capacity, improve thermal comfort.

Abstract: Application of raise-boring method to construction of Wangtaipu Mine 1 # auxiliary return air shaft,it proved the method is more fast, safe and economical than the previous construction methods commonly used. This paper describes the construction technology of the large diameter air shaft in coal mine by new raise-boring machine and successful experience for reference.

introduced mineral well in the process of producing to constuct to exist the phenomenon and characteristics of excrescent heat in the well bottom, and to well next excrescent the reason of the heat carried on analysis argument and provided foundation parameter and basis for the mineral well next move heat control measure.

Total length retrievable resin mental bolt is a new kind of bolt for coal mine stoping road way,with the merit of good anchoring effect and recycling.The coal face of Huayuan coal mine is very short, and the service cycle of the stoping road way is also short, because of the geological conditions limitationg. Total length retrievable resin mental bolt is suit to the coal mine condition.It is important for attaining energy conservation target.

Pillar is always in the coal roadway reserved for protection mainly. The microstructure of coal and rock-mass cracked and developed would affect the stability, especially for the strong seismic area in the northwest of China, affected by of structural stress within the coal of its microstructure and secondary disturbance, pillar of large section roadway destabilization easily. Base on the experience and theoretical calculation, resemble simulation experiment, borehole-peer and loose circle monitoring at 110206 face, the large section roadway’s pillar stability is analyzed, through all of these, we ensure that the pillar width 30m is reasonable finally, and it could be fit the needs of security. At last, the abutment press’s range was assured quantity, and the support suggestions were offered either.

In order to ensure the smooth implementation of the transformation from underground into open pit mining, the harmful and probing techniques of mined out area is analyzed in this paper. So as to facilitate the detection and treatment of mined out area, the classification of mined out area is done according to the origin. There are four harmful aspects of mined out area to open pit mining, such as economic benefits falling, difficult to maintain continue production, threatening the safety of open pit mining, and the difficulty of drilling and blasting increasing. Geophysical methods are practical detection methods of mined out area, and proved by several open pit mines the 2D resistivity imaging surveys is the most effective one at this stage. Mechanical detection method is suitable for confirmation of suspected mined out areas.

To further enhance the location precision of unknown nodes in wireless sensor networks , a location method based on genetic algorithm is presented : the combination of wireless sensor network and genetic algorithm. It can improve positioning accuracy through iterative optimization. the method is dependent on distance, which can get the coordinates of the unknown node through the distance of unknown node and known node.