基于综合探查手段的深埋矿井工作面顶板富水性分区
Water-rich Partition of Working Face Roof of Deep Buried Mine Based on Comprehensive Exploration Methods
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摘要: 以巴彦高勒煤矿311101首采工作面为例,在工作面回采前,先通过瞬变电磁法、音频电透视法相结合的物探工程,探测煤层顶板富水异常区,再布置钻探工程进行顶板水疏放,掌握钻孔涌水量和水压分布情况。综合物探和钻探工程成果,最终确定划分工作面顶板富水区。结果表明:顶板物探工程探测出6处富水异常区,施工的56个顶板水疏放钻孔中,钻孔涌水量和水压分别划分为4个数值区间,综合分析后将工作面顶板富水区划分为4个,并在工作面回采过程明显发现,每经过1处富水区时,工作面涌水量均会出现1次“阶梯式”增长,验证煤层顶板含水层富水性分区的合理性和准确性。Abstract: The 311101 first mining face in Bayangaole Coal Mine is taken as the example. Before mining in the working face, geophysical exploration project combining transient electromagnetic method with audio frequency electric perspective method are used to detect the abnormal water-rich area of the coal seam roof. Then the drilling project is arranged to dredge roof water and master the distribution of water inflow and water pressure. Based on the results of geophysical exploration and drilling engineering, the water-rich area on the roof of the working face is determined and divided. The results show that six abnormal water-rich areas are detected in the roof geophysical exploration project, and the water inflow and water pressure of the fifty-six roof water drainage boreholes are divided into four numerical intervals. After comprehensive analysis, the roof water-rich area of the working face is divided into four parts; in the mining process of the working face, it is obvious that the stepped increase will appear for the water inflow of the working face for every water-rich area. This phenomenon verifies the rationality and accuracy of water-rich partition of the roof aquifers.
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