榆神矿区采煤失水危险性分区研究

以榆神矿区区域地质资料为依据,总结了该区煤层与含(隔)水层空间组合类型; 采用三维数值模拟方法,根据塑性条件、破坏准则及应力判别,模拟首采煤层与含(隔)水层空间组合类型下导水裂隙带高度; 通过对比钻孔探测法与数值模拟法,发现数值模拟法具有可行性; 利用模拟结果,绘制矿区导水裂隙带高度空间分布图,总结矿区导水裂隙带高度的整体分布规律; 对比导水裂隙带高度与其首采煤层上覆岩层厚度,总结矿区采煤失水危险性,并进行采煤失水危险性分区; 通过控制采煤失水危险区域的采厚可以达到“保水采煤”的效果。本研究对榆神矿区后期安全生产具有重要的理论意义与实际价值。

Study on risk zoning of coal mining water loss in Yulin-Shenmu coal mine area

Based on the geological data of Yulin-Shenmu coal mine area, the authors summarized space combination of coal seams and aquifers in the study area. With three-dimensional numerical simulation method, based on the plastic condition, failure criterion and stress criterion, the authors simulated the height of water flowing fractures for different space combination of the first coal seam and aquifers. After comparison between borehole detecting results and numerical simulation results, it shows that the numerical simulation method is feasible. According to the numerical simulation results, the spatial distribution of water flowing fractures height in Yulin-Shenmu coal mine area was illustrated, and the general distribution rules of water flowing fractures height were summarized in this paper. The risk of coal mining water loss in Yulin-Shenmu coal mine area was summarized and the risk zoning of coal mining water loss was also made through comparison between water flowing fractures height and overburden thickness of the first coal seam . Controlling the mining thickness of water loss area is helpful to coal mining water preserve. This study is of great theoretical and practical value for late production safety in Yulin-Shenmm coal mine area.