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Coal mine safety funds are divided into employee's safety input funds, safety technology funds, and safety management funds. It is great significance for the realization of the optimal safety input orientation and the selection of safety projects to scientifically allot each safety funds. This paper uses co integration test and Granger causality test to explore the long-term steady relationship between...
This study will analyze the refined safety management of Chinese coal enterprise by means of the high-level interviews, case analysis and investigation. And it will also use real evidence and case studies to verify the effectiveness of contents and systems of the enterprises' refined safety management. This work will help the enterprises shake off backwardness and low efficiency of safety management...
Two dimentional mathematical model of tunnel temperature field in condition of diffusion during seam smoldering steady according to heat transfer theory and comservation of mass, momentum and energy. Temperature character of tunnel in condition of diffusion during seam smoldering steady is simulated by COMSOL Multiphysics according to this model. Results show that temperature field in tunnel can be...
In order to take effective dust removal measurement of transfer point of a coal preparation plant, it is necessary to put forward the optimal dust removal scheme. Production workmanship and dust pollution mechanism of the transfer point in a typical coal preparation plant has been analyzed. Based on the analyses, two feasible dust removal schemes of transfer point, namely the guide-chute dust removal...
Through the theoretically analyzing of the foundation of outburst prediction indexes and the existing prediction data of coal mine, a mathematics model was established with the dimension theories by considering with weights of dominant factors for ascertaining sensitive factors of coal seam. The established model and grey relevancy analysis were successfully verified in four coal mine of Pingdingshan...
The sense of mining progress was analyzed. The model of production function considering mining technical progress and mining condition of coal bed was proposed. The growth equation and the production function were deduced when the two factors were considered. The research indicates that mining technical progress has a great effect on the output of mine enterprise when mining technology develops promptly...
In the process of coal mine construction, it is significant that how to identify the risk factors and to take measures to prevent the occurrence of safety accidents for the mine investment unit to speed up the construction of the new mines and exploit the coal energy rationally. With the ability of structural equation model that processes the variables and their relationship, this article applied...
Belt conveyor is one of main electromechanical systems in the coal transport system, its safe operation plays an important role in the whole coal output systems. As the belt conveyors get longer, quicker and bulkier, the traditional static design method already can not satisfy the requirement of actual engineering. One of problems is that a huge peak belt tension induced by the starting and stopping...
It is very important that to establish a rational and quantitative mathematical model for the safety management of coal enterprises. The model can help managers to develop practical safety management objectives. It can help people find out the safety production trends also. In this paper, time discrete state equation on the principle of Cybernetics was used to study coal mine safety production model...
A method based on independent component analysis (ICA) and Kalman predictor is proposed to predict the methane and carbon monoxide in coal mine. Two disturbances of hydrogen and ethane are mixed into the gas samples to simulate the real world situation Features extracted with ICA are respectively predicted by Kalman filter step by step to 476 points, compared with BP neural network, the mean square...
The ventilation system is the basis to control the hazards in coal mine laneway. High reliability ventilation system can continuously convey fresh air into laneway , dilute the noxious gas, reduce disaster and ensure the mining productivity safe and effective. As we know that, many noxious gases in the coal mine laneway are compossible and their flowing states are complicated. In order to acquire...
Middle and small size fault structure is the key geological factor affecting the safety production of DongPang mine field. Finding out development character of middle and small fault structure in DongPang mine field is to provide the geological premise for mining design of coal mine and working face layout. Based on the analysis of real data, 20 factors affecting the development of middle and small...
Air flow character and gas mathematical mode of heading laneway in coalmine is researched in detail to tackle with normal ventilation and gas discharging problem. Combining with ventilation requirements and safety regulation in coalmine, control strategy which aims at both safety and energy saving is established at length. Moreover, conventional double fuzzy control model is found to carry out two...
Based on the System Dynamics theory and the causality of the factors influencing competency of mine special operators, this paper established a dynamic simulation model of Training function on the Influencing Factors of mine special operators' Competency. The studies showed, under the same training inputs, coping capacity, sense of security responsibility, and self-management skills have more visible...
The character of gas moving and air flow in heading laneway of underground coal mine were researched, control strategy which aims at both safety and energy saving was established at length. Moreover, conventional double fuzzy control model was found to carry out two work mode, normal ventilation and gas discharging. Since four input signals affect output in different degree, the idea of flexible weight...
The thin coal mining equipment multi-rank choice and it is traditional choice method subjective capriciousness question, This paper is intended to discuss and analyze the assessment of mining method by the utilization fuzzy set and fuzzy mathematic theory, the equipment to carry on the multi-ranks to decompose, carries on the quantification recursive operation according to the normalizing formula,...
The nonlinear relation between methane concentration and the output voltage of the sensor is indicated by analysis of detection principle of catalytic methane sensor. This paper proposes a nonlinear correction model based on functional link neural network (FLNN) with the output voltage of methane sensor as input and the methane concentration as output to eliminate the nonlinear errors in methane detection...
A numeric simulation of gas migration in a fully mechanized coal caving stope based on Lattice Boltzmann Method is put forward. A mining stope includes an inlet air tunnel, a return air tunnel, a working face and a goaf. There are two different states of air movement in a stope: turbulent flow in the inlet air tunnel, the return air tunnel, the working face (the three parts are simplified as working...
Gas migrating in goaf and congregating in upper corner result in gas over limit in upper corner which greatly influences coal mining safety. To explore the cause of upper corner gas over limit and control it, this paper provides Lattice Boltzmann Method (LBM) simulation of gas migration and control in goaf of fully mechanized coal caving mining face. After analyzing the characteristics of goaf, a...
The broad masses of coal mining enterprises have been very concerned about how to effectively evaluate safety and reliability of mine ventilation system. Domestic and international scholars in this regard have also carried out a substantial amount of research and made a variety of different types of evaluation methods, but because there are many complex factors that affect the safety and reliability...
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