[Abstract] The dump slope is man-built high steep slope, the stability design and calculation of which is unavoidble in the daily production of surface mines. The slope stability analyse methods base on limit-equilibrium theory were applied very widely and efficiently in the engineering practice. Shengli No.1 surface mine,Nothern Power,Shenhua Group was taken as a case study, after repetitious analyse and calculation aided by FLAC/SLOPE, the designed dumping parameters meet the need of safe production need, which is reasonable,security and acceptable, the dumping slope fathering advice were provided.

In this paper the NiO/γ-Al2O3 supported catalyst was prepared .From the load of nickle、calcination temperature and calcinations to discussed the effect of different preparation conditions on catalytic activity. The optimal conditions of the NiO/γ-Al2O3 was confirmed, the structure and performance of the catalysts was conducted by XRD testing measure. The optimal preparation condition of NiO/γ-Al2O3 is the load of nickel: 10%, calcination temperature: 450℃; calcinations time: 5hours.

Abstract： The financial company is a non-bank financial institution who to provide the financial service in technological transformations,the new product development and the product sale for the enterprise group members, to provide medium and long-term financial services primarily. The direct reason of the current coal enterprise group to establish the financial company is for overcoming the difficulties of unmet fund needs that produces in the coal mine resouces conformity. The financial company's financing functional localization is closely related with it in the entire group organizational structure's status as well as own financial organization nature. The enterprise group should take the corresponding measure, make the financial company to provide the fuller fund guarantee in the display financing function aspect for the coal enterprise's developping, to play its financial platform role for meeting the coal enterprise big group construction needs after coal resources conformity.

The Construction of one station，s main structure in Hangzhou has been completed, then it has found that there are water penetration in several structure cracks. In underground engineering, this phenomenon is very common .Baseing on this station，s specific situation, first introduces the waterproofing measures in design, material selection and construction , and then analyzes the reasons for the leakage of water, and finally use chemical plugging method to control leakage of water office.

In this paper, two kind of situations of the coal mine has the foundation pillar and the non-foundation pillar in view of Gao Jialiang in the supports and protections carries on the simulation. Separately from the adjacent formation supports and protections unit bending moment, the adjacent formation stress, the adjacent formation distortion and the adjacent formation plastic area scope carries on the analysis to two kind of situations, Obtains the special function of the foundation pillar in the supports and protections

The piling technology and bearing mechanism of the ram-compacted piles with bearing base were introduced in this paper by listing real engineering projects. By means of taking full advantage of rigid soil layer and RC piles strength, foundation bearing capacity was improved effectively. Basing on the structures’ safety grade, the condition of the construction sites and the structure forms, we can acquire better economic, social and environmental benefits with appropriate choice of the piles with bearing base.

摘要：采煤工作面在生产过程中需要进行调面回采。通过选择合理的工作面与下顺槽应取夹角和调面方案，采用楔形调面法，将工作面与上下顺槽调整到合理的几何状态；从而提高了生产效率和回采率，取得了良好的经济效益。

A dual switch forward converter design method is discussed in this paper, DC-DC converter topology is researched based on UC3842 integrated controller chip. This circuit uses optimal high frequency transformer and driver circuit. The system can achieve steady-state output voltage which has a higher accuracy, a smaller the ripple factor, and this system has a fast dynamic response. Experimental results show the effectiveness of the design method.

Sniffer is provided with functions of real-time monitoring and network performance analysis. It finds out that symptoms and takes timely measures to solve the problem, rather than search the network faults which have been formed. It is very important to ensure network security for the large-scale systems. Using Sniffer in this distributed monitoring network of coal mine system, this paper conduct researches of network troubleshooting and network maintenance.

According to the deficiencies of dredging system which used for the current underground water storage of mine，we will research about dredging equipments and characteristics of coal slurry，as the breakthrough to solve the problem of coal mine water storage siltation．Taking slime of underground water storage of Cuijia fortress as a example，by recording and analyzing the results of screening test，ash test，flocculation test and so on，we can be aimed at finding the basis of a fundamental solution to the current problems with the dredging system design，equipment selection and so on．

It’s always a important environmental problems that the mine water discharges without appropriate treatment in west coal mine area.The mining water not only has a unique quality and features, but also has special needs on technology, covers and investment,especially in small coal mines. The paper points out that the environmental problems could be solved by promoting integrated technology through analysising on principles and types of integrated water purifier,and also gives the design process.

Abstract :The coal mining is hardly influenced by the field condition, and the original design usually can’t suffices the production and the extension in later period of the coal mine. It should be improved according to the actual situation. The article take the Sai meng te er coal mine as an example, that using the assistant tunnel for the ‘fast moving’ to realize the optimization of transportation system as ‘flyover to level’, and hoped that can provide a new line for the coal mine design in the same conditions, realizing the safely, the economically and the efficiently production goal .

Based on the stuty of WIA and GPRS technology,a new design of Mine Safety Monitoring System for wireless network program based on WIA and GPRS is put forward. By means of WIA protocal advantages in low-power wireless communication and GPRS network in long-distance data transmission, the system microcontroller and CC1101 and CC2431 RF transceiver chip is introduced to design WIA-PA wireless network nodes. The decision for remote control can be made through detecting sensor parameters. Compared with traditional wired solutions, the program has low power consumption, low cost, high reliability.

This paper puts forward a kind of temperature monitoring system, which is composed of wireless data transmission device nRF24L01 and 1-Wire bus digital temperature sensor DS18B20. The system of multichannel real-time temperature date collection based on LabVIEW is introduced. And，the application of this system in wireless temperature monitoring system is discussed．

Abstract: The supporting of complex roof roadway is one of the puzzle around the world. On the basis of analyzing complex roof roadway enclosing rock’s failure method, this paper discusses reinforced-arch theory and suspension theory of bolting support mechanics, which is used in optimizing of supporting method of the main shaft of Weiyi coal-mine. Compared with the steel-skeleton and concrete work support, the construction speed is improved nearly 100% and manufacture cost is lowed about 39%.

In order to treat inundation in Feng-ji orchard coal mine, and obtain available coal reserve of submerged Oasis, yama and Zhou-shun mine in the East and in the upper Southeast. Based on the analysis of mine water bursting of surrounding mine in the East, a curtain grouting blocking technique was used for treating inundation. In the course of construction, the following method, such as curtain wall reinforcement, borehole encryption, upgoing grouting, layer and section grouting and so on, was adopted. After grouting, through coring test, inspection hole and drainage experiment, the method is verified, which verifies that the method was effective to treat the mine water bursting. Morever, available 200 million tons coal reserve was obtained.

Encountering large aquifer with high hydrostatic pressure during shaft well construction is a common but world widely difficult problem. Construction schedule may be delayed and construction safety may be greatly endangered, too. Because of this, a large aquifer, with a hydrostatic pressure of over 2MPa and a shaft inflow of over 250m3/h, appeared 180 meters deep underground in constructing Pingdingshan No.6 Mine airshaft. To solve this problem, firstly, the relationship between water inflow and characteristics of porosity and fracture was analyzed in this paper. Secondly, the water-bearing media types was catalogued according to the variation of drilling inflow. Then, the final plan of “chemical grouting + layered grouting” was settled after a comparative analysis of the four pilot programs, which was proved successful in the end.

The loss high-slope was 170 miter tall at shuiliandong colliery, it was in limiting equilibrium state in the native condition. It needed dispose in order to arrive at safe station. Author adopted the measures of cutting slope and consumering load, applying back pressure to base of slope, and cutting down the degree of slope by means of many surface plates to increase the degree of safety. Author simulated the excavation process with different stage, mastered the variance of stress, strain, displacement, stability factor location and characteristic of potential slide surface of the slope in different excavation phrase. At last, Author concluded the result of excavating slope generated variation of stresses; soil body rebound and movement, the direction and magnitude of movement varied with stress. In addition, author proved the harnesing program was safe and logical that cutting slope and consumering load, applying back pressure to base of slope, using the characters of the original slope form.

In order to solve the problem of hydraulic assembly at fully mechanized coal face, the support the assembly process is optimized using the methods of program analysis of industrial engineering in the paper, the five activities that processing, testing, handling, storage, waiting were asked and considered using the "5W1H", and the problems of the original assembly process were found out, and the process was optimized using the principles of the ECRS. Practice shows that: the efficiency of hydraulic support assembly was greatly improved to ensure the smooth installation of mechanized mining face, thereby protecting the normal replacement of working face using the optimized assembly process.

Take second-up coalface of Huangshan mine as research object, the characteristic and law of the coalface is analyzed; Improved cubic exponential smoothing method is estabished based on cubic exponential smoothing method and the principle of least square method. Study on prediction of underground pressure of the coalface is done by the improved method. The results show: Underground pressure of the coalface show obviously nonlinear and non-regularity, the characteristic of periodic pressure is indistinctive. Improved cubic exponential smoothing method can be used to predict the underground pressure, and the accuracy is high. The method is applicable for the characteristic of underground pressure.

The establishment of the three-dimensional geological model of 1262（1）work face was based on the features of coal occurrence. Reference the rock mechanics test data, the cover rock movement caused by under ground mining was simulated by using software FLAC3D. The displacement and stress distribution of cover rock caused by underground mining was analyzed, the damage and deformation characteristics of the t op floor was discussed.

To address the problems of high-ash and refractory coal slime floatation, It has an universal significance how to use the appropriate agents to improve the flotation quality. The experimental results show that the flotation quality could be improved after adding a depressant in some extent; and LAS can also be as a new type of foaming agent used in flotation. This article provides a new reference to choose the appropriate depressant and Develop varieties of forthers.

Abstract: In an assessment report of environment impact, surface movement and maximum deformation were predicted using probability integral method, parameters involved in which are subsidence coefficient q, a tangent of main influence angle tgβ, and horizontal movement factor b. lithology evaluation factor P for the above parameters were used when no value measured. In this paper, the parameters were obtained by factor P (lithology evaluation factor) when no surface subsidence parameters measured, with which the maximum surface deformation prediction was did in a new coal mine work face in Shenmu county of Shaanxi province.

Prevalence of cost management that the final accounts exceeding the budgetary estimate. The main project is current engineering cost management theory is lack of the study of the factors which influence the excess budgetary estimate phenomenon. This article focuses on the study of these influence factors, trying to find some solutions to resolve the excess budgetary estimate phenomenon in the management of the construction cost in our country.

The millisecond electric detonators now used in China’s coal mine have an identical or fixed sectional interval-time. Under the condition that the total delay time is limited, the same or fixed sectional interval-time of the millisecond electric detonator can’t achieve good blasting effect. Therefore, a rational sectional interval-time of the millisecond electric detonators should be determined according to the factors including the cutting-in method, the cross-sectional area of the roadway, the property and depth of blast holes and the characteristics of the blasted rock in order to achieve an ideal blast effect.

Base on analyzing the Variation of the stress and displacement of multi-slot in the coal seam, studied the effects of the whole stress-relaxation in the coal seam. through the FLAC software analysis in coal seam within the slotted groove, in 1-meter area, more than 65% stress reduction; the displacement changed more than 4.11mm，and in the range of 3 meters can be achieved overall relief effect. The results of the application proved that this technology allows the interaction between drilling, Increased the fracture degrees, released the stress of coal seam, Increased permeability, improved the rate of gas extraction。

Coal mining safely under a reservoir is the one of the difficult problems in China’s coal mine. Based on Seam cover storage, geological structure, hydro-geology, mining methods, the specific geological and mining conditions and the status of the Wu-xing reservoir of the 32th district in Lugou Coalmine, Zhengzhou Coal & Electricity Co. Ltd, and based on the calculation results of safety pillars , combined the prediction of surface movement and deformation, the article analysed the security of mining under the Wu-xing reservoir. Through calculation and analysis that it is safe and feasible under the Wu-xing reservoir. At present, the first face 32101 is safe after mining, which validated the calculation and analysis is scientific and reliable.

With the progress of science and technology, information technology has got wide application in coal production area. Lrgis Mine Geographic Information System introduced by Zhengzhou Coal Industry Co., Ltd. has achieved visualization and network and intelligentize of management.It has got effective supervision and guidance of production safety, and it has reduced the security costs and improved the efficiency and obtained good performance. Especially Mine Geographic Information System has been held in high esteem in large go-throngh engineerings.