Perfect power monitoring system is vital not only for improving the quality of coal power supply,but also for ensuring the production safety. Based on industrial Ethernet and fieldbus technology,the Coal Power Monitoring system introduced in this paper will certainly play an important role in coal production due to the following reasons:the system can realize power system monitoring , real-time data acquisition and analysis, fault alarm and event records;furthermore,it has the function of rich graphics demonstration, human-computer interaction, statistics and report forms.

Abstract：Selecting right type of bellows expansion joints plays a important role in running pipe network.The article mainly introduces selection of expansion joints in the L-shaped tube.By comparing the three compensation ways,a plane tri-hinged expansion joint,double tied expansion joint and bend pressure balanced expansion joint, a plane tri-hinged expansion joint with little deformation stress and without stress at blind flange can mitigate greater vertical and horizontal hot dis-placements,it is a better choice.

LA-01H well is the first CBM multi-branched horizontal well for lu’an mining area. Based on real data of LA-01H well and field experience, this article summarized experiences and lessons of drilling technology. By the research of multi-branched horizontal well technology, provide a new method to lu’an mining area coal bed methane exploitation.

The edges detected with Green’s function are greatly affected by the noise and the threshold value . To solve this problem, anisotropic diffusion equation is used to eliminate noise. Threshold segmentation algorithm with the improved exponential entropy is used in Green’s function algorithm. And the improved particle swarm optimization is used in the threshold segmentation. The improved green function edge detection is introduced to the welding seam image processing. And the defect of usual edge detection methods in antinoise ability and precise locating ability is made up. Simulation result shows that edges detected with improved algorithm are fine and coherence. And the influence of noise is low. The effect is very good.

To extract subsided land is a matter of ecological restoration .Making full use of spectral information and spatial texture feature ,subsided land extraction is realized based on object-oriented method .Firstly, filter is reconstructed by morphology,and image is reconstructed by morphology,after multi-scale segmentation by watershed segmentation,image is segmented into closure and Independent regions,and the spectral feature,form feature and texture feature are calculated for the basis of classification;then features are selected on the basis of thematic extraction.Lastly, subsided land is extracted by classifier in the light of selected features. object-oriented method has better accuracy than other methods.

DEM simulation are applied for the analysis of combination mining covering rock destruction law . DEM simulation results indicate that increasing supporting resistance of powered supports can decrease the height of fractured zone above working face. Heightening upper mining level of coal seam under unconsolidated aquifers water body with high hydraulic pressure can succeed by increasing supporting resistance. The research provides theoretical basis and practical guide for decreasing safety coal/rock pillars under unconsolidated aquifers with high hydraulic pressure.

With the development of coal and electricity industry in Huainan City, fly ash emissions are also increased. How to comprehensively use the fly ash and change waste into valuable, it is an significant subject in environment treatment and comprehensive utilization in Huainan.

According to the coal spontaneous combustion fire's development characteristic and the mine geological condition of 1106 contacts lane to shut, analyzed the reason which the coal spontaneous combustion fire occurs, then in view of the different ignition factor determination government mentality with a clear goal, formulated the comprehensive techniques of fire-controlling by decreased temperature and the leak stoppage primarily, and then utilizes in the technology of the gel for fire fire-extinguishing in the implementation process and the technology of backfill tunnel with inflate and the fire-extinguishing technology with the high polymer colloid in successfully，At last，the 1106 contact lane fire was controlled in the shortertime with the highly effective and safety，prevent the noxious gas moving to the south wing total return air proliferation, guarantee 他the coal mine product . in safety。

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Abstract: This paper proposes the research and application of wireless sensor networks technology and GPRS technology in the coal mine safety monitoring system, and discusses the principle and advantages of wireless sensor networks, as well as the design of coal mine safety wireless monitoring system. Based on wireless sensor network technology and GPRS technology, proposes the designing proposal and the under-bit machine monitoring mechanism of coal mine safety wireless monitoring system, the system through optical transmission in the main shaft, through radio wave transmission in the roadway, may at any time flexibly changes the node location or changes the number of nodes in accordance with the shaft laneway structural changes.

The remote monitoring technology of coal mine transformation substation was studied. The main communication configuration types were summarized. The improved scheme based on the CAN fieldbus, Ethernet, and Modbus-TCP protocol was proposed. The universal remote monitoring system based on the multi-protocol adapters, Ethernet and the host configuration software was also detailedly described.

Visualization of Qianjiaying mine fire and rescue decision-making system is based on mine ventilation network of mine fire theory and computer graphics, based on visual programming using VB to develop a mine fire dynamic development process of expert decision-making software.

Abstract: The paper analyzes the status quo of Dayang Coalmine, propounds the problems needing to reform and planning, follows the principle of overall planning, respects for nature and traditional culture and business characteristics, gives the reform and design proposals and measures for the problems of office areas, production areas and the major road of coalmine.

The outburst of 4# coal seam is dangerous in Shaqu mine, and gas problems are seriously hindering the mine safe production. The coal seam gas in workface was controlled through pre-pumping and drainage while mining. The Flow equation was established based on Percolation theory and Diffusion theory. With the actual situation in Shaqu mine, Maximum drilling spacing was obtained to meet the extraction time and extraction rate requirements. The maximum drilling spacing was as the rational arrangement of spacing of pre-pumping and draining while mining, which ensured the economic and efficient borehole construction.

Mine transmission travelling belt longitudinal tear is a big problem of mine belt protect. At present, detection of belt longitudinal tear in accuracy and reliability can not meet the requirement. With the development of digital image processing it’s widely used in the industrial inspection, giving a method on the belt longitudinal tear using digital image processing and using ant colony algorithm optimizing canny operator. The experiment result shows that the optimal edge detection is an effective detection method of belt longitudinal tear.

[Abstract]This paper presented the reason that nonlinear load harmonic source generated harmonics，and the influence and harm to the quality of power supply．It also drew into the concept of dynamicand steady—state harmonics．M ethods of traditional and new harmonics suppression were discussed inthis paper．It stated the develop direction of active power filters applied in power system．

Abstract: The style of deep-new developed areas ia a style of that, the coal seams covered with huge-thick overlying stratum and the buried depth of the coal seams is bigger(800~1000m). Formerly, the deep coal resources has never been explored and mined and the datum of the distribution status of coal seams is lacking in these areas because the distribution of coal seams is deeper. It is almost blank exploration areas and it is more difficulty to explore the deep coal resources.Through the analysis and summarize of exploration course of Gaojiabao exploration area, it is studied that the distribution rules and exploration modules of coal resources of the style of deep-new developed areas.

On the basis of obtaining mechanics parameters, a simulation model of induced depth of seam floor was built. The extant of induced depth of 12 coal seam floor. the water pressure, exploitation progress effect on the induce depth of seam floor was analyzed. The research shows that the induced depth of 12 seam floor is changed with coal exploitation. After 20 years, the induced depth is about 23m, it is very closed to practice, which is about 18m.

Fully mechanized sub-level caving face is a complicated non-linear system, and the selection of equipment and technological parameters for coal drawing and the forecast of recovery rate of the face are complicated non-linear problems which are difficult to solve with traditional mathematical method. A Neural Net- work model is established to predict face recovery rate, to select shearer and powered supports and to optimize coal drawing method and interva1．The results of actual application indicate that the model is precise and reliable to deal with non-linear relation among factors, and has larger practical value．

According to the Physical Model of Steep thick seam using fully mechanized caving in WEI Hu-liang mine +579E2EB1+2 face,by the use of acoustic emission technique (acoustic emission, AE) do real-time tracking Analysis for dynamic mechanical parameters and their corresponding micro-structure evolution in the process of localization. From the macro and micro Aspect revealed the localized deformation-evolve to Instability Rules in Composite coal and rock medium under different mining conditions.It will provide clues for the forecast and control in goaf derive dynamic disasters.

Abstract：The database design, key algorithm, general concept and implementation steps on building three-dimensional geological model by coal borehole data were introduced in this paper which was based on AutoCAD and database technology. This Software can automatically draw drilling histogram, Delaunay triangulation (D-TIN) and contour lines and output the 3D geological model of coalmine visually.

Abstract: Mine belt conveyor is one of the import devices in coal to increase produces of mine and automatic of technology. This paper designed an integrated protection system of belt conveyor. The mine belt conveyor of the system is designed in this paper which identified measuring methods of belt faults of speed,temperature,fog and disalignment.The protection system check statues information of PLC,which realized realtime speed detection and comprehensive judge of belt conveyor fault that increase automatic of technology .

In order to effectively evaluate operating performance of coal listed companies, this paper uses principal component analysis (PCA) to analyze the operating performance of the sample companies and sorts the analysis result combining with SPSS statistical software. The result shows that: the method has the application value and can provide the support for performance evaluation of the coal listed companies.

In view of the problem with underground selective leakage protection, the principle of zero-sequence power direction is focused in this paper, and the determination of three conditions for underground selective leakage protection is realized by the zero-sequence voltage and current sampling as well as the phase comparison circuit. At the same time, the electric simulation software named Multisim 9 is used to test the feasibility of the circuit, and experimental waveform and data are given to testify the practicality and reliability of circuit.

Abstract: The progress of heavy metal wastewater treatment by fly ash was introduced. The adsorption efficiency was affected by the temperature, adsorption time, pH value, initial concentration of heavy metals, the fly ash and waste water ratio and the dosage of fly ash. The key problems limiting the application and popularization of this technology is saturated ash treatment, sludge and low separation ratio of ash and water. Introduce the improvement approaches.

According to the unusual change situation of gas emission in Xin’an Coal Mine, with the gas-geology theory, by means of analyzing systematically the gas geological data of coal geological exploration and mine research,it analyzes various geological factors which affect methane occurrence of Xin’an Coal Mine.because the second mining area is effected by syncline in the western and eastern and thrust fault in south, the gas raises rapidly, magmatic rocks invade coal seams in the form of bedrock, the telemagmatic metamorphism makes coal seams have further gas generation, and the gas is sealed into the coal seams, simultaneously magmatic rocks invade crack and roof of coal seams, which play a sealing role in dissipation of coalbed gas, that is also the deeper reason of gas accumulation whose reason is that magmatic rocks invade zones.

Abstract: This paper described a new type of coal inclined wedge-shaped vehicle by the working principle of cuniform increase power safety device in breakage rope and test was done．The device has a compact, light weight, motion-sensitive, rapid, safe and reliable locking superior technical performance, etc.

Because of air quantity is short in some working place which is located in the north area of Chensilou coal mine, temperature will increase after enter the deep mining area, after a mensuration of resistance in ventilation system has been performed, according to the north return air draft’s construction plan some plans about mine ventilation system optimizing and transforming have proposed. Use the result of calculation by computer based on the data obtained in mensuration and analysis, the paper given an optimizing and transforming plan for mine ventilation system to solve the problems, the implementation of the plan has met with the air quantity requirements, obtained good effects.

for the problems of control system of Air Compressor, an unattended operation system of the compressor in mining supervise and control was designed .The PLC was the core of the whole control system .All the Field Devices were constituted a communication network. All this combined with remote monitoring and breakdown diagnosis technology and real-time database ，made the wind pressure system more secure, advanced, stable, reliable, and ultimately achieved unattended purposes.

Gas comprehensive extraction techniques are techniques which take various gas comprehensive controlling methods by using available space and techniques. Though discussing of gas comprehensive extraction schemes on 1121 (3) comprehensive mining face in Zhangji Mine and checking of them extraction effects; the effects of various gas extraction techniques are analyzed and contrasted in this paper. The characters of various gas extraction techniques are also summarized. Valuable practical experience is provided to optimize gas comprehensive extraction schemes of latter mining faces next to 1121 (3) in Zhangji Mine.

Abstract: Roadway driving along next goaf during approaches face advancing will suffer the effect of dynamical pressure in whole course caused by structure adjustment of fracture, rotary and touch gangue in main roof in adjacent section. Thus the deformation in roadway is large. The vertical stress in surrounding rock is obtained by FLAC2D numerical calculation, showed that it has significant difference to vertical pressure distribution in roadway driving along next goaf in stable goaf edge, the former peak point which is elastic-plastic juncture is farther away from the goaf. Based on the deformation features in surrounding rock in roadway driving along next goaf during face advance, the control principle of surrounding rock is put forward: the reasonable pillar width; the high intensity and large elongation of rock bolting using in the roadway as well as improving the narrow pillar intensity through prestressed pair puncture anchor cable and grouting reinforcement technology. The engineering practice is carried out in LiMin Coal Mine and achieved good results.

Accurately selecting gas geology index for regional prediction of gas outburst is the key to guarantee the high precision of gas prediction. Various factors contributing to coal and gas outburst is analyzed, and the index prediction is combined with gas geology method, tectonic soft coal and gas content is put forward as the two indexes for regional prediction of gas outburst, which provides technical support for mine scientific management and improving economic benefits of safety. Finally, putting Zhangji Mine as an example, Zhangji Mine’s regional prediction of gas outburst is realized by use of the selected indexs.