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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...
Physics and mechanics performance of paste-like backfill material in coal mine such as strength, allowable specific pressure and compressive rate was researched by experiment. The results showed that after curing for 8 hours the backfill material could achieve sufficient strength to keep stable with the content 3% of binding material and the slurry density 77%; After curing for 90 days the backfill...
Based on summing up forecasting method and theory about water-inrush from floor of working face, combined with a lot of practical information analysis, the main five factors controlling water-inrush from floor are found out, which are water yield property of aquifer, water pressure, effective confining stratum thickness of mining floor, fault or broken zone and mining pressure. According to the typical...
A new type of monorail hanging technology was invented to solve the auxiliary transportation problem in soft rock or coal bed roadway, and clearly introduced the hanging scheme and making a feasibility analysis. This new type of monorail hanging technology makes the monorail application in soft rock or coal bed roadway to be possible, solves a major problem in mine auxiliary transportation mechanization...
Predicting water-irruption quantity from coal floor is of significance to coal mine safety production. It is complex nonlinear system related to influencing factors, Aimed at improving generalization, the predictive mode based on wavelet decomposition and artificial neural network was proposed, detailed learning algorithm was proposed and it was used in prediction. Both of the subsequent and the examination...
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...
Based on systematic collection of the hydrogeological data of coal mine, we analyzed the factors affecting water inrush from coal floor and determined the major factors. We used the fuzzy clustering method to evaluate the water inrush risk from coal floor in order to solve the evaluating limitation of water inrush risk from coal floor by the water inrush coefficient method. The fuzzy clustering method...
A novel extension evaluation method of coal mines geological safety was proposed in this paper. Based on the extension theory, a matter-element model was established for qualitatively and quantitatively describing the safety evaluation problem of coal mines geological safety. The degree of relation based on the dependent function was employed to determine the nature and the level of the safety in...
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