小保当井田2-2煤潜水采动影响分区研究

Study on influence zoning of underground water mining of 2-2coal seam in Xiaobaodang Mine Field

针对小保当井田在未来开采过程中造成的地下水资源大量漏失的问题,以小保当井田开采的2-2煤层为研究对象对潜水资源受煤层采动影响分区进行研究。采用富水指数法通过AHP-熵值法建立评价模型划定了萨拉乌苏组潜水含水层富水性分区,根据相邻煤矿导水裂隙带现场实测类比确定了井田2-2煤层导水裂隙带发育高度及层位,采用信息融合理论方法综合松散潜水含水层富水性分区和2-2煤层导水裂隙带发育层位划分小保当井田内潜水资源受采动影响分区,得出结论:井田未来开采2-2煤层时对松散潜水含水层的采动影响较小,仅存在一般失水区,位于井田南部且范围较小。由于在研究过程中采用了相邻矿井的资料,因此对相邻矿井未来进行相关研究和煤炭开采有一定的指导意义。

Aiming at the problem of massive leakage of groundwater resources caused by the future mining process of Xiaobaodang Mine Field, taking the 2-2coal seam mined in Xiaobaodang Mine Field as the research object, the zoning of phreatic water resources affected by coal seam mining is studied.The water-rich zone of the deep water aquifer in the Salawusu Formation was established by the AHP-entropy method using the water-rich index method.According to the field measurement and analogy of the water-conducting fracture zone in adjacent coal mines, the development height and horizon of the water-conducting fracture zone in the coal seam 2-2of the mine field are determined.The information fusion theory method is used to synthesize the water-rich zone of the loose phreatic aquifer and the development horizon of the 2-2coal seam water-conducting fracture zone to divide the phreatic resources in the Xiaobaodang well field affected by mining.It is concluded that the mining of the 2-2coal seam in the mine field will have little impact on the mining of the loose water aquifer, and there is only a general water loss area, which is located in the south of the mine field and has a small scope.Since the data of adjacent mines are used in the research process, this paper has certain guiding significance for the related research and coal mining of adjacent mines in the future.