For the problems in classification of fly ash at present, the chemical constituents and physical properties influencing the quality of fly ash was analyzed，and degree of finess，vitric，loss on ignition, K2O, SO3 and CaO are chosen as the criterion indices for classification of fly ash, the pozzolanic activity of fly ash are consider，a classification method of projection pursuit was established，optimized its project direction used Ant Colony Algorithm，and the model is applied to classifying in an example. The evaluation results are accurate，this method is simple，and some errors were eliminated because of the subjective factors for traditional methods. Projection Pursuit is a new evaluation method of judging and classifying of the quality of fly ash，it has provided scientific basis to comprehensive utilization of fly ash.

The rising global energy demand connected with the aim to reduce the carbon dioxide emissions offers new perspectives for innovative processes for the more efficient utilization of fossil fuels. In this paper, the effect of temperature, pressure and pressing time on the dehydrating NeiMeng E Ji’s lignite in the Mechanical/thermal experiment were studied, as well as the desulphurization of the lignite. The results show that Mt could be reduced to below 12.5%, by more 60% at 160℃, 7MPa and Pressing time 30s; and the sulphur removal could get 45% at the conditions.

Based on the achievements of early works，the visualized optimization design(VOD)method, together with relevant research significances, objectives, research flow and research tool are synthetically postulated. The Top-coal Hydraulic Support design can be comprehensively fulfilled, taking a Top-coal Hydraulic Support as example, the VOD proposed was applied to studying its designing process, assembling process, analyzing intensity, kinematic state and working process, and the result showed the validity of the VOD. At last, the application results revealed that the VOD can improve the design quality of products in an all-round way.

In order to improve the development efficient of information system and reduce the difficult of design in software architecture, this paper creates an enterprise-oriented prototype system which is based on MVC design pattern,solves the key problem of system. Analysis the benefits of using prototype method.

abstract:There is handling capacity to be low and washing the higher of the water density shortcoming to coal preparation plant slime water process systems for rongshan of Guangyuan of Sichuan, transform the slime water process system of original coal, choose rational flocculant, and introduce effect got by make over.

The composition and microstructure of high-As coal in western Guizhou have been studied with polarizing microscope, scanning electron microscope and X-ray energy dispersive analyzer. The occurrence of the As are also studied in this paper.

In this paper, based on the analysis of hydrochemistry types and distribution characteristics of group a karst water of coal floor, the karst water system in the study area is divided into recharge area, runoff and discharge area, and stagnation area, by using discriminant analysis of carbonate dissolution and precipitation，the forming internal power of water chemical composition, such as, lixiviation, decarbonation and devulcanization, concentration and alkalization, reduction and oxidation etc. is found through analysing the chemical characteristics and formation mechanism of the water in each subarea.

Coal mine safety accident was a problem that needed to solve urgently. Based on the risk of pre-control of coal mine safety management is a process management，to prevent the occurrence of coal mine safety accidents，it is required to identify the source of dangerous occurrence，pass dangerous information to the risk of pre-control centers to make a risk assessment and develop the pre-control measures.

This paper introduces a kind of criterion to judge whether the belt is broken, investigates a hydraulic detecting device for belt-broken seizing machine, which changes the flaws of the mechanical detecting device for belt-broken in the past in principle. The author designed and made the experimental detecting apparatus for hydraulic detecting device for belt-broken, and the experiments have been done. As it turned out, the device is obviously superior to previous detecting device in the detection efficiency for belt-broken.

This paper compares domestic feasibility study report (FSR) with internation one. The analysis is based on hot topics and key outstanding issues asked by international mineral industry. It points out the dificient and things to be addressed. This research will help domectic FSR to fit for international requirement with better capability to against risk.

The paper presented a design project of personnel position and communications based on ZigBee technology. It can realize supervision for personnel position, important devices and its trouble by control management center, which adopt the method of combination of fixed wire and wireless, signal intension detection.

The research of roadway supporting technology without the pillar becomes increasingly more and more important, as the coal resource is less and the depth of the mine increases. It is proposed the application of super high pre-tension supporting technology in the gob-side roadway driving, based on the surrounding rock of roadway control theory and the super-high bolting support technical system. Surrounding rock deformation under the super high support is studied by the local industrial experiment and the mining pressure monitor. The result reveal that this technology can enhance the bearing ability of the roadway surrounding rock, improve the stress distribution of surrounding rock, control the roadway deformation effectively. This essay combined the industrial experiment of Xie Qiao mine 1251(1) transport roadway analyze the surrounding rock deformation in the gob-side driving. The results shows that the support effect is good and control the deformation effectively.

The purpose of the article is to reveal the double-disk dual-network of shotcrete layer on the stress distribution of surrounding rock influences, and the double-disk dual-network shotcrete layer structure and ordinary concrete self-bearing capacity of shotcrete structure. Article on the two different load-bearing concrete structure mechanism is analyzed, and through computer simulation of two different structures surrounding rock stress of quantitative research results show that the double-disk dual-network concrete structure has not only changed the force the state of a single network supporting concrete, making it the confined concrete, but also makes the rock stress concentration significantly change the situation, the findings on the soft rock roadway supporting the theory has a very important guiding significance.

Abstract: Implementation of the strategy for sustainable development presents new challenges for the economic evaluation system of coal construction project. This paper, based on engineering life-cycle theory of coal construction project, respectively discussed life period and calculation period, evaluation indicators and uncertainty analysis in the economic evaluation system, added on the project's contribution assessment of regional economic growth. It would provide some consultation for economic evaluation of coal construction project in the feasibility study stage under the new situation.

Established Mathematical model about composite Index method of Zhaolou mine field first mining area according to geological conditions of rock burst occurred. Defined the threshold of rock burst zoning according to Mathematical model’s regression fitting based on adjacent mine area rock burst data. Calculated the rock burst Index by this model about first mining area divided 247 Element meshs. According to calculations, zoned the first mining area about risk. Risk regions mainly distributed in the area of roof condition ⅠandⅡand large himalayan period fault and fold distribution density. Relative risk regions mainly distributed in the area of structure condition relatively simple and roof condition ⅠandⅡor roof condition Ⅲ whose structure condition relatively complexed. Relatively safe regions mainly distributed in the area of roof condition Ⅳ or roof condition Ⅲ whose structure condition simple.

The paper studied dozens of reagents as combustion-supporting agent of coal by the method of calculating weight-loss after static combustion in crucible. The results show that the catalytic effect of some traditional combustion-supporting agents such as manganese is inferior to that of some new materials not been reported such as carbamide, citrate, ammonium metavanadate, etc. So we believe that these materials have potential to be new type of combustion-supporting agents of coal powder that be injected in blast furnace.

The steel wire is widely used in mine hoist. The steel wire is replaced when it is not fracture. To solve this problem, a detection method of steel wire crack based on Digital Image Process is proposed. The image is acquired by CCD camera, and the crack is detected by edge detection. The alarm is occurred when crack is detected and the alarm is handed down to the upper computer. Experimental result shows that the detection precision is high based on Digital Image Process, and the resource waste is reduced.

The configuration software of coalmine monitoring system requires stronger parallel processing ability, whose deadlock can make great harm to the safety production of coalmine. This paper details the structure of the configuration software, and addresses the reason that causes the dead lock. The queue mechanism and the schedule mechanism for multi-thread with priority are researched and programmed by using Java to resolve the deadlock, and achieves the expectations.

On the basis of A large number of instances and their predecessors summing up arguments,summarized the impact of thick coal seam top coal caving of the most important three factors, namely: Integrated intensity of top coal, Mining depth and Roof lithology. Concluded that single-factor evaluation membership degree evaluation form and a simple relationship between the type by used Principle of fuzzy mathematics, and get the actual production validation and applications.

In this paper, theoretical calculations and theoretical analysis of the key stratum under the cover of a deviated well face the impact of mining feasibility studies, safe and fast recovery of the face provides a theoretical support. In the inclined shaft construction set point after the adoption of continuous observation has not been covered under the impact of mining face.

Based on summarizing of seven representative gas ratios, this paper analyses the characteristics and variation curves along time of fire gas ratios using amended calculation methods of Oxygen deficiency in a fire-zone sealed due to spontaneous combustion. The result of research shows that comprehensive application of some ratios can determine the status of combustion more accurately in a hidden fire-point and sealed fire-zone. JTR is weak to indicate the type of fuel when fire is faint. In analyzing the temperature of fire-zone, some individual high temperature points would be neglected. The size order of ratios at different places can provide guidance for ascertaining the position of hidden fire-points and key regions in fire-zone.

Based on weights allocation method in rough sets theory, this paper converts the questions of determining weights into that of estimating significance of attributes among rough sets, by which knowledge systems are built through making attribute value into eigenvalue, then the weight of a risk assessment model is computed by analyzing the support and significance of forecasting method for the evaluated object. The proposed approach reduces the subjectivity of traditional methods for weight determination, and makes risk assessment more objective and practical, thus improving the precision of risk assessment for coal working face. The result of the research can also be used as the foundation for decision-making of coal mine safety production.

In the paper, a novel boost matrix converter (BoostMC) based on Boost circuit and AC-DC-AC matrix converter is presented, by connecting a Boost circuit worked under the high frequency on middle direct current link of AC-DC-AC matrix converter. Through utilizing boosted function of boost circuit under the high frequency pulse condition, the voltage transfer ratio of matrix converter can be increased remarkably. Meanwhile, the conception of reference input voltage was shown to adjust reactive power of BoostMC and BoostMC could be reactive-load compensation equipment in electric network. It discussed discontinuous conduction mode of Boost circuit and analyzed mathematic model, circuit topology and control strategy of rectifier, inverter and middle boosted circuit of boost matrix converter. The simulation results demonstrated that the validity of theoretical analysis and modulation strategy presented, in which maximal ratio of voltage transfer is above 1.0. The waveform of output voltage is similar with sine wave perfectly. The harmonic of output voltage is around of switch frequency and slightly influenced.

Designing a portable gas detector with MCU ATmega128L and it is small size, easy to use, carried by mine staff conveniently. Gas sensor MQ-4 senses the gas concentration in the surrounding environment, and output a homologous analog voltage value, which is quantized by the AD transform channel of MCU, and can accurately determine the gas concentration in the surrounding environment after fuzzy logical algorithm. It will alarm to tell workers to withdraw from scene immediately and adopt effective venting practice, when the detected gas concentration exceeds safe preset value. The gas detection equipment is high precision and fast, can early warn gas outburst events effective, reduced the false alarm rate greatly by fuzzy algorithm, which provides a reliable guarantee for the safe production of coal mine.

In response to the flaw and deficiency of the current Coal Analysis Instrument, a new and quick coal analysis system was proposed, which has multiple functions including data collection, quick analysis, real-time data display and storage and so on. In this paper, introduced the system's structure and composition, illustrated the design of the Embedded Hardware Platform and the realization of the software key technology in detail. The result of the spot test shows that the system analyses quickly, functions stably and works well.

Abstrct:The text designs a sort of conversion system of local fanner base on blur-nn aim at mine pick-advance working face .It resolves preferably problems of founding math-model difficulty and revamping blur-control formula difficulty and dynamic respond capability errand.It have preferably spread appliance foreground.

End-slope design impact the recovery of surface coal mine, while end-slope stability directly related to surface mine production safety. This paper starts by the characteristics of surface mine inner dumping ,analyzes the section forms of surface mine slope, compares the different slope angle, end-slope stability between different forms of slope section, buried height and time of the last bench to analyze the impact of end-slope timeliness to steep end-slope mining. Anjialing take full advantage of open-pit mine slope dump timeliness of the inner row of the slope and convex slope design methods available to help the coal terminal capacity of 265.6 thousand t, cost-effectiveness 26.36 million yuan .

It’s important to Control the movement of the surrounding rock in the process of coal mining by gangue paste-like backfilling, especially the control of the Immediate Roof. The cracking of the Immediate Roof is meaningfulness for the quality of the backfilling, the control of the surrounding rock and the control of roof backfill district. Make the Mechanical model of cracking of the Immediate Roof, and solve the height of the Immediate Roof’s free space

Extractive mining area in order to optimize the deployment, to achieve safe and efficient exploitation of the protection layer based on the exploitation of regional conflict prevention measures, that is, the exploitation of the protection layer can be protected for the protection of coal has played the role of relief. In this paper, the protective layer qidong mine mining process, was the protection of the underlying coal seam angle relief to protect the theoretical analysis and coal petrology and gas dynamic parameters of the site inspection, the mine must have been gas-geological conditions of the protection unit relief angle, the parameters similar to the protective layer under the conditions of exploitation of the protection of relief to determine the reference angle.

In terms of mechanical surroundings of the gob-side entry retaining, an elastic mechanical model of the filling body is established. By using the variation principle of elastic theory, the distribution characteristics of the displacement in the filling body are discussed, and the distribution laws of the displacement field in the filling body are obtained preliminarily. The results can provide a theoretical basis for the study on the stability and the control of the filling body.

The development of modern power electronics had paved the way to design a transformerless illumination power supply for coal mine application. The novel power supply has the features of small volume, low weight, multiple input voltage grades and wide range of output voltage grades. The article has also introduced a solution that bi-directional switches chopped PWM converter which is used to reduce the voltage grade for implementing a Transformerless Illumination Power Supply. The solution is proofed reasonable both by analyzing and simulation so that it can be treated as a Transformerless Illumination Power Supply for Coal Mine.

Production process of falling coal, loading coal, transporting coal, supporting and so on in fully mechanized coal face constitutes a systematic project, the advancement and reliability of the whole system not only requires the advancement and reliability of each single equipment, but also requires equipments matching responsibly. In this paper, based on the special exploitation conditions of 112201 working face in Meihuajing Coal Mine such as high output, large face advance length and so on, Principles of main equipment selection and methods of type selection design were analyzed and calculated, it has a certain reference value for equipment selection in similar working face.