某矿保护煤柱开采对井筒的影响分析研究

Analysis and research on the effect of protected pillar mining on shaft in a mine

依据井筒煤柱的具体情况,设计了2个开采方案(方案一:在井筒单侧布置一个采宽100m、长度330m的41051工作面,所留煤柱距井筒100m;方案二:在井筒两侧对称布置2个采宽100m、长度330m的工作面,分别为41051工作面和41053工作面,所留煤柱距井筒100m)。采用概率积分法对采动过程造成井筒的移动变形进行预计分析,并得出预计分析结果;对比分析可知方案二较为合理。

According to the concrete situation of the coal pillar in the shaft,two mining schemes are designed(scheme 1:a 41051 working face with a mining width of 100 m and a length of 330 m is arranged on the one side of the shaft,and the remaining coal pillar is 100 m away from the shaft;scheme 2:two working faces with a mining width of 100 m and a length of 330 m are symmetrically arranged on both sides of the shaft,respectively,41051 working face and 41053 working face,with a coal pillar spacing of 100 m from the shaft).The probabilistic integral method is used to predict and analyze the displacement and deformation of wellbore caused by mining process,and the predicted analysis results are obtained.The comparative analysis shows that the second scheme is more reasonable.