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Coal mining is restricted by various mine geological disaster, and the largest mine safety issues are the water-inrush accidents. The precondition of Coal mine safety and production is ensuring the safety of coal floor. Usually coal floor is composed by different rock, it cannot be directly applied for mechanics model to analyze and calculate. In this article different formation stratum are reduced...
This paper use the gray single-level evaluation evaluate coal enterprises' security condition with a gray theory, let the coal enterprise's evaluation be more scientific and more realistic and provide a reference for the safe appraisal of coal enterprise.
This paper adopt fuzzy comprehensive evaluation method to evaluate the mining methods for complex difficult steep coal seam. Using FAHP to calculate weight vectors of each assessment factors, in order to get more real reaction of sorting relationship between various factors. Then calculate evaluation scores for various mining methods by establishing the mining methods fuzzy comprehensive appraisal...
Through exposition on top coal caving mining method, as well as fully-mechanized top-coal mining method in the current development and prospect of China's largest coal enterprises, at the same time it can bring great benefits, also raised its recycling rate is still generally low phenomenon, effect analysis of the main reasons: at the end of the early mining losses, loss of head loss, caving technology...
For the actual implementation of fully-mechanized caving mining in thick coal seam in China, systems analysis of the influence factors of top coal capability, including natural geological factors and technology factors. Influence factors of top coal capability, constitute analysis of fully mechanized caving coal loss, thereby reducing loss of coal, improve mining rate of fully mechanized caving is...
The highway construction in China has been leading to increasingly serious problem that more and more coal is left under highway. Getting the unexploited coal as much as possible and ensuring the safety of highways at the same time becomes a subject that must be solved urgently. The paper discussed the characteristics of highway deformations which were caused by underground mining, proposed the principles...
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