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Aiming at the drawbacks in disposing coalmine accident hidden troubles the paper sets forth the market-oriented concept and method of coalmine accident hidden troubles. The method fixes on the quantitative value of unsafety state and the hidden troubles factors composed with behavior, technology, environment, and equipment, and establishes accident hidden troubles price system. It constructs the market-oriented...
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...
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...
The occurrence of accident be understood as mutations in a qualitative change caused by a continuous change of some of the parameters within the system. The system from security state into the state is actually a mutation phenomenon. The paper applies the Catastrophe theory and system analysis method of the accident causation, establishes the spire catastrophe model. By analysing the model, indicates...
In order to reveal major factors constraining China's coalmine safety, the principal-agent relationship in China coalmine safety management is analyzed, a multi-task incentive model is constructed by setting different functions of production and safety performance, the coalmine manager's work behavior under optimal incentive contracts is analyzed and some meaningful conclusions are obtained. It is...
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...
Coal is the major energy in China, and its development key lies in narrowing the gap with international counterpart and promoting international competition ability. The paper established the coal industry international competitiveness evaluation index system. Based on the coal industry competitiveness data of 11 main countries rich in coal, the paper adopted principal component analysis for comprehensive...
Mine work face gas emission is the important basis for mine design, and has important practical significance for ventilation and safety production. Between mine gas emission and work face there are complex nonlinear relationships. The paper constructed a work face gas emission prediction model based on wavelet neural network. It based on statistics of a mine work face gas emission data, applied the...
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,...
A novel alarming assessment model of coalmine gas is presented in this paper. Based on the information fusion technique of multi-sensor, we introduce the thought of variable fuzzy set to assess complicated and risk coalmine gas. Through information fusion we can get more effective and reliable data about coalmine gas. The method for variable fuzzy set theory can reasonable identify the relative membership...
Based on the theory of system engineering, coal mine production safety has been analyzed. From workers, production process, coal production and economy, coal mine production safety evaluation indexes have been confirmed, and then the BP neural network model of coal mine production safety evaluation has been built. After training and testing the model, the model can accurately evaluate the coal mine...
Based on the unascertained theory, the paper elaborated exhaustively the modeling process of the unascertained measure model. Combined with the unascertained measure model, the safety factors affecting underground fire are analyzed and evaluated. According to the reality of Bofang coal seam 3, we can collect the measured data, determine the fire risk evaluation index, calculate for example by using...
Based on the unascertained theory, the paper elaborated exhaustively the modeling processes of the unascertained measure model. Combined with the unascertained measure model, the safety factors affecting coal seam-roof stability are analyzed and evaluated. According to the reality of Bofang coal seam-roof stability, we can collect the measured data, determine the safety evaluation index, calculate...
In this paper, finite element analysis has been applied on the Phi2.8 mtimes5.75+2.25 m of southern Africa that has been contracted by CBMI Construction Co Ltd. Different contact finite element model as manholes in different position of the twelve clock points are built by using ANSYS parametric design language (APDL). Stress and deformation under the actual condition were presented by calculating,...
It is not easy to entirely avoid the uncertainty of supply problem. To solve the problem relays on setting up some necessary safety stocks. Safety stock is an effective management tool for protecting the enterprises against the uncertainty and it provides customers with the promised service level, but a higher safety stock level does increase the supply chain operating cost. Determination of safety...
The gas supervision is a safety core of the coal mine production, which widespread existent a trouble, gas emergence big data, namely the pulse interference, the cause of the gas signal mistake alarm, is hardly resolved very often. In this paper, the reason and characteristics of gas emergence big data are analyzed to establish a kind of filter based on BP Neural Network. Through great quantities...
In order to construct digital coal mine, a three layer model for digital coal mine model is proposed in this paper. Two basic platforms, the uniform transmission network platform and the uniform data warehouse platform, are discussed. A real 1000 M industrial Ethernet transmission platform based on Siemens PROFINET is established for Yangchangwan coal mine. The network platform is an information superhighway...
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