某矿保护煤柱开采对井筒的影响分析研究
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摘要
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100 m、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 workingface with a mining width of 100 mand a length of 330 mis arranged on the one side of the shaft,and the remaining coal pillar is 100 maway from the shaft;scheme 2:two working faces with a mining width of 100 mand a length of 330 mare symmetrically arranged on both sides of the shaft,respectively,41051 working face and 41053 working face,with a coal pillar spacing of 100 mfrom 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.
According to the concrete situation of the coal pillar in the shaft,two mining schemes are designed(scheme 1:a 41051 workingface with a mining width of 100 mand a length of 330 mis arranged on the one side of the shaft,and the remaining coal pillar is 100 maway from the shaft;scheme 2:two working faces with a mining width of 100 mand a length of 330 mare symmetrically arranged on both sides of the shaft,respectively,41051 working face and 41053 working face,with a coal pillar spacing of 100 mfrom 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.
引文
[1]郭增长,谢和平,王金庄.极不充分开采地表移动和变形预计的概率密度函数法[J].煤炭学报,2015,29(2):155-158.
[2]麻凤海,杨帆.断层构造影响下井筒煤柱开采研究[J].辽宁工程技术大学学报(自然科学版),2016(4):27-31.
[3]何国清,杨伦.矿山开采沉陷学[M].徐州:中国矿业大学出版社,2013:15,336-339.
[4]郝志勇.基于UDEC的保护层开采中覆岩移动规律的数值模拟与分析[J].中国矿业大学学报,2017,16(7):81-84.
[5]郭宏云,陈新.基于和分解有限变形力学理论的深部软岩巷道开挖大变形数值模拟分析[J].岩石力学与工程学报,2016(Supple 2):4050-4055.
[2]麻凤海,杨帆.断层构造影响下井筒煤柱开采研究[J].辽宁工程技术大学学报(自然科学版),2016(4):27-31.
[3]何国清,杨伦.矿山开采沉陷学[M].徐州:中国矿业大学出版社,2013:15,336-339.
[4]郝志勇.基于UDEC的保护层开采中覆岩移动规律的数值模拟与分析[J].中国矿业大学学报,2017,16(7):81-84.
[5]郭宏云,陈新.基于和分解有限变形力学理论的深部软岩巷道开挖大变形数值模拟分析[J].岩石力学与工程学报,2016(Supple 2):4050-4055.