In order to study characteristics and control measures of water-inrush from floor under the condition of high pressure in deep mining. Based on the hydro-geological conditions of Zhaogezhuang mine, and through the analysis of the waterproof properties of the water-resisting layer, the karst development situation of the floor limestone and the hydraulic conductivity of the revealed faults in the floor of the 122 seam of the 14th level, this paper holds that the water-inrush in the floor of the 122 seam of the 14th level is caused by the faults and mining effected, and the emphasis to control the water-inrush is to prevent the fault water-inrush effected by mining. Also, this paper gives the waterproof technology measures in aspects of roadway excavation and mining, and the reasonable width of the waterproof coal pillar. Through calculation, the reasonable widths of the waterproof coal pillars for the both sides of the EastⅢ are 262m and 233m.

The paper has analysed the problem that slurry water is difficult in natural subsidence. According to the characteristics of slime water, a flocculation-coagulation comparative exprimentation is carried out between two groups of combination medicament, which choose the PAM as flocculant, alum and PAC as a coagulant. The results show that the combination of PMA and PAC is better than that of PMA and alum ,whose optimum test condition is the dosage of polyacrylamide 6mg/L,PAC 60mg/L, with the treated concentration of clear solution 0.03g/L.

As the coal deep mining, coal roadway stability control draw more and more attention. In this paper, the surrounding rock in deep coal enhanced control ideas, its core is the "three high" bolt support system. Combination of "three high" bolt and apply FLAC numerical simulation successfully resolved 12,418 trough Caving deep high pressure coal roadway problems. Enhanced control of the deep surrounding have the promotion of ideas of great significance。

In this paper, according to multi-feeding condition in belt conveyor in mine, a auto-control system for coordinated loading was developed to avoid belt conveyor operating overload. The system consists of armour belt feeder and PLC control panel, and a empirical formula for load in the feeder and system control flow were given.

This paper describes the use of embedded monitoring sub-station as a relay station, electrical installations for smart devices at the scene to conduct real-time data collection, formed a Ethernet-based embedded power coal mine safety monitoring system, has realized three net correspondences and the long-distance monitoring in the laboratory, will be advantageous to the modern coal mine construction.

This paper designs a Support Parameter Designing Software of visual interface using BP Neural Networks model, through collect of Qianyingzi Mine and surrounding mineral area geology and roadway support parameters and effect, determine main influence parameters of the roadway support, establish the sample space and train the network. The software successfully applied to the Qianyingzi Mine Roadway support parameters design.

Although enough waterproof pillars are kept by the corresponding Technical Specification, water inrush and crushed timbering have happened in some fully-mechanized faces of PanJi mine. The definition of “adown penetration zone” of groundwater with high pressure are put forward firstly in this paper based on analyzing the forming data. The formation mechanism and influence factors of “adown penetration zone” are analyzed. And the reason of water inrush in some faces with enough waterproof pillars are put forward through combing “adown penetration zone” with water flowing fractured zone.

Abstract: To further study fracture characteristics of coal and rock and obtain the relevant mechanical parameters, MTS triaxial testing system and point load apparatus coordinate AE(acoustic emission) has tested on fracture toughness of 5-2coal samples . Through acquiring uniaxial compressive strengh of coal and analysis of testing results,AE combined with point load reflects apparent single crack from damaged irregular coals and the average uniaxial comprssive strengh of 51Mpa；AE coordinate with MTS triaxial testing system makes known that parts of destroyed coal are granular but most still maintain a high integrity and the average uniaxial comprssive strengh of 31Mpa under saturated and natural status.Although the two methods for measuring the uniaxial compressive strengh value have some different,but the coals reflect dense and solid characteristics. So multi-jiont testing technology provid new research approach to obtain more accurate parameters.

It is publicly known that the deep mine is hard to be supported for the reason that the wallrock, affected by ‘three high’, presents a characteristic of large nonlinear deformation, and it has made great threat to safety. For characteristics of high strength toughness of deep mine roadway supporting structure, A construction plan has been present in this paper, that is adding cement-based material to high toughness polypropylene (thick) fibers and high elastic modulus of steel fiber to form a kind of composite cement-based material sprayed in the wallrock surface as the support layer, working with retaining bolt, anchor retaining structure to form a common. Based on the Kong Coal Mine examples of deep tunnel construction,it researches on key technologies under construction such as fiber concrete proportion, fiber adulteration craft, spray craft and thickness,determination of fiber concrete secondary lining working hours. Besides, this paper has also introduced the actual results combined with examples that will provid reference for its promotion.

The traditional method of seam thickness prediction is to interpolate and contrast between the boreholes, of which precision is very low. Some previous methods are summarized in-depth in this paper. On based of the thin-layer theory，Seam thickness Prediction and affected factors Analysis with borehole restrained amplitude-moment method is realized through writing applications. Examples show that the method has simple, fast, accurate characteristics. Satisfactory results are achieved in a coal mine in Shandong.

3 coal samples of different rank and 4 PSS of different sulfonation degree were employed to prepare CWS, and the main focus was on the influence of sulfonation degree of CWS dispersing agent on the pulping properties. The results show that PSS performs excellently on dispersion property and stability in CWS; the apparent viscosity of CWS prepared by coals of different rank increases firstly and then decreases with the increase of sulfonation degree; when sulfur degree of PSS was 59.87%, CWS of 3 coals all perform well in stability.

Abstract：On the analysis for status quo and requirement of standards for informatization of coal industry, the well-structured standard system for informatization of coal industry is established in this essay, which orderly settle the standards among informatization construction of coal industry according to their internal connecting link; it’s a blueprint of existing, proper and estimating standards for informatization of coal industry, which can promote the standard for informatization of coal industry to scientification and rationalization. It explains the sub-systems and analyses the relationship among them also. At last, the article suggests that a PDCA development model of the standard system could be adopted to promote perfection and practicalization of the system. Key words：coal mine; informatization; standard system; overall structure; development model

The cemented filling system powered by low pressure wind was researched and developed，and gob-side filling was carried out to 11111w working face of Xiezhuang Mine with this system, which maintained the integrity of the roof, and supported the roof effectively; and the whole working face was filled artificially, which prevented the rotation and sinking of the roof 's key strata effectively, reduced the pressure of roadway greatly, and was of important significance for the success of gob-side entry retaining. Results indicate that this system with wide applications is practical, simple, and is an ideal gob-side filling equipment.

Abstract: this paper for shek mun debunk more close to highlight dangerous coal extraction, auxiliary hydraulic punching combination, one-time security expose more close outstanding coal seams safety technology. Put forward in accordance with the provisions of coal seam with close when shimen coal uncovering the feasible method for coal mine, is a complex condition of shek mun debunk outstanding coal seams work provides successful experience.

The nasty coal accidents occur constantly in China in recent years. The accidents have brought about the heavy economic losses and bad social effects. Since being lack of production safety in coal enterprises still exist in different degrees, the exploration on security integrity management model construction of coal enterprises was carrying on, through which four components were found, that is the security integrity management idea, security integrity management mechanism, security integrity management system and security integrity management measures.

In recent years, the coal mine accidents happened frequently in our country, through coal mine accident statistics and mechanism analysis between 2004-2010, an innovative coal mine accidents human error model is put forward from the new visual perspective, and provides a new thinking way for the safe management of China's coal industry, and also find out the main reason that lead to coal mine accidents happen frequently in our country, raise the safety control measures from the new vision of team construction.

Abstract：It is important that equipment anti-slip and anti-inverted in mining steeply dipping seam，Xinjiang prime coking coal company is located in west China, No.25112 working face in 2130 level drift is in steeply dipping thick seam, the“Roof- descending slope-floor” layout method is invented by theoretical study and practice experience. By using this method, the impact that slip support upside to the downside is reduced, the failure roof in the lower sect along the dip direction is also decreased, which ensures safety and high-efficient production in this kind of working face.

Abstract: Reasonability on the application of hydro-fracture to measuring the strength of coal seams is investigated in the paper. The tests are successful in Dongshan Coal Mine in probing the strength of the coal pillar. The methods to obtain the parameters are more accurate then in the lab. The application of the parameters obviously decreases the width of the pillars for water blocking and increase the mineable coal reserve for the mine.

According to the gas which is difficult to drainage as it is low permeability and outburst in the Pingdingshan mining area, the hydraulic fracturing was first used in comprehensive treatment of coal mine gas, which is proved successfully and effectively both in reducing the coal seam gas pressure and in improving the permeability of coal seam gas. In order to ensure the outcome, we have done some directional fracturing investigations for the sake of optimizing the parameters of coal mine hydraulic fracturing. Based on the above, a hydraulic fracturing and sealing equipment was developed successfully and promoted, which is suit for coal mine.

Abstract:In recent years, with the implementation of the thinking of Harmonious Society and the Copenhagen conference, low-carbon emission reduction and energy conservation becomes an important issue.In Inner Mongolia province which is full of coal, how make the coal industry and economic development, especially the ecological environment develop harmonically, this issues become much more important.In this paper, using the coordination theory, the author establish the system model of the coal industry - economic development - the ecological environment, quantify the extent of harmonious development of the above system for nearly a decade in Inner Mongolia province, analyze good and bad phases in the decade, identify main reasons and hope it as a reference for the future harmonious development of systems of Inner Mongolia.

Abstract:With the belt conveyor in coal mines and other industries applicated widely, the conventional static design method can not meet the practical needs.It is is necessary and significance to do the dynamic analysis on them. This belt conveyor dynamics analysis software is established on the continuous dynamics model of belt conveyor. Using object-oriented programming tools MatlabR2008b and Visual Basic6.0 and basing on COM component technology , the data transmission between them is realized. Basing on component technology ,we realized the dynamic analysis software runing withou the MATLAB environment. This software is more widespread application value and practical significance.

Strip mining is a technology that is widely applied to control surface subsidence and protects ground buildings and ecological environment at home and abroad. Meanwhile, it is also one of main technical methods of green mining technique system. The surface movement prediction of strip mining is a key to the design of strip mining under buildings. Therefore, in this paper, the relationships among the predicting parameters of surface movement in multi-coal seam strip mining, the mining width, the spatial position of upper pillar and lower pillar and so on, has been established by analyzing the field data of surface movement in multi-coal seam strip mining, which provides a feasible method to select the predicting parameters of surface movement in multi-coal seam strip mining.

The topology of three-phase three-level neutral-point-clamped PWM rectifier was discussed in this paper. The basic principle of space voltage pulse width modulation was analyzed. Voltage and current double closed loop control was adopted in three-phase VSR system, The mathematical model of control system was set up in matlab. The experimental results of simulation was proved the steady of DC voltage，low current Harmonics，fast response and low load change sensitivity to disturbance.

Abstract Coal re-preparation is one of the way that increasing the utilization of coal quality. Use Xinyu Shanxi coal mine in the sub-elected as the research object, crush it to 3mm, and sieve with a pore size of 0.5mm grade, take 3 ~ 0.5mm fractions,study coal properties by laboratory heavy liquid tests. Take predictions of heavy medium separation for 3~0.5mm.The broken after the election and full recovery clean coal. Enterprise brings better economic and social benefits.

The dynamic response of three soft seam is simulated by UDEC and compared with that of site monitoring, then got the stress distribution of caving workface .It is shown that the simulated vertical and horizontal velocity history of the slope toe agrees well with the monitoring results. The three zones can be divided, and it provides a theoretical basis for prevention and control of coal spontaneous combustion in three soft seam caving workface.

Based on the present level of fully mechanized top coal caving technology,the article get the rule of roof movement of high face fully mechanized sublevel caving by way of analysing similar simulation,it plays an important guiding role in studing the coal mining method and productive practice .

In the coal industry, the design of coal quality management information system still has problems, such as the difficulty of system revision, the inflexibility of business logic expansion, etc. On the basis of studying about coal quality management process in depth, we design and implement a J2EE Web development framework in a higher level, which uses freemaker + webwork + ibatis + spring four-layer architecture to ensure that the framework is loose coupled and extensible. The running results show that this system effectively improved the efficiency of coal quality management and it has a broad application prospects.

According to characters of elastic wave technique, Two transform-based methods (Wavelet transform and Fourier transform ) are discussed , the paper presents an integratived signal-processing approach. the method can effectively predict mine bolting defect degree and location, and reach a few meaningful conclusions .

Pei ditch on the application of advanced coal research and pre-drilling and pumping relieving roadway for comprehensive anti-coal injection process technology, reducing the roadway coal gas content and pressure to ensure a safe and efficient coal roadway excavation, has made clear Efficiency

As the strong domestic demand for energy and mineral resources and strategic position of resources, getting more overseas resources by way of merger and acquisition (M&A) has become a strategic initiative for Chinese enterprises. Based on the statistical data in 2009, the article carried out a detailed analysis of location distribution, ways and means, main body, payment pattern of M&A on the overseas resources. Combined the reason for failure about CHALCO inject funds to Rio Tinto, proposing strategies about M&A on the overseas resources :Encouraging a variety of parties to take part in the M&A; Weaken the “national colors”; Adopt strategy of Low-key expansion; Expand the scope of destinations on M&A.