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261303工作面是六采区13煤首采工作面,为推覆体寒武系下76m防水岩柱下开采工作面。由于推覆体寒武系灰岩局部富水性较强,因此,推覆体寒武系灰岩水和13-1煤顶板砂岩水将威胁261303工作面的安全开采。通过对261303面地质、水文地质、工程地质等条件进行分析,提出工作面回采是可行的,并提出了相应的水害防治措施。开采实践证明:261303面推覆体寒武系下76m防水岩柱开采是可行的,为矿区相似条件下工作面安全开采提供了技术依据。
261303 Face is the first coal mining face of 13 coal in Liuetai District, mining face under the 76m waterproof rock pillar under the Cambrian of the Nappe. Due to the strong local water richness of the Cambrian limestone in the nappe, the nappe Cambrian limestone water and the 13-1 coal roof sandstone water will threaten the safe mining of 261303 face. Based on the analysis of the geology, hydrogeology and engineering geology of 261303 surface, it is feasible to mine the working face and put forward corresponding measures to prevent and control water damage. Mining practice has proved that it is feasible to mine 76m waterproof rock pillar under Cambrian 261303 surface crust to provide technical basis for safe mining of face under similar conditions.