ChanHou Occurrence Rule Analysis Of Mining Underground Runoff And Coal Seam Mining Risk Assessment

Bottom of limestone aquifer of single symptom field development, blank thickness of water-resisting layer distribution, the limestone water pressure and the mining damage under the joint action of a bismuth production water bursting accidents. In the field, the author of this paper is mainly mining coal floor and the limestone water-bearing rock characteristics were studied.First analysis of the mining area floor geological and hydrogeological characteristics of limestone, the results show that the main influence on coal seam open distance of the limestone aquifer in no.1, no.5 coal seam with potential threats. Strong runoff, uneven water content., through the analysis of the drain test, geophysical exploration for the limestone strata by line detection in detail, it is concluded that different mining area the ordovician limestone karst development zone. By means of 3 d modeling software 3 dmine second mining area the limestone aquifer in modeling analysis, build a model for more accurate calculating the flow field inside the area and volume provides a convenient conditions. To water inrush coefficient of water inrush coefficient contour map at the same time, according to the space relationship of aquifer and the coal seam roof and floor, and can directly reflect mining coal seam outburst danger zone. Finally according to the related parameters to establish the inrush and fault according numerical simulation model, to make the model has better applicability, using multiple conditions in calculation. The results to the existing mining technology under the condition of safety in production is of important guiding significance.