上煤层开采后煤柱稳定性及底板岩体破坏范围分析
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摘要
针对开采近距离煤层的下部煤层时,回采巷道受上层煤开采时残留区段煤柱在底板岩层内形成集中应力影响严重的问题,在理论分析上煤层回采后留设煤柱稳定性的基础上,进一步计算分析了工作面开采后底板岩体破坏深度和煤柱下围岩的应力分布规律,研究结果对下煤层巷道的合理布置位置有一定的参考价值。
When mining the lower coal seam of the near-distance coal seam, the mining roadway is affected by the concentrated stress of the residual section coal pillar in the bottom plate after the upper coal mining. On the basis of theoretical analysis, the stability of the coal pillar after the coal seam mining is retained. The calculation of the failure depth of the rock mass and the stress distribution of the surrounding rock under the coal pillar after mining face are calculated and analyzed. The research results have certain reference value for the reasonable arrangement position of the lower coal seam roadway.
When mining the lower coal seam of the near-distance coal seam, the mining roadway is affected by the concentrated stress of the residual section coal pillar in the bottom plate after the upper coal mining. On the basis of theoretical analysis, the stability of the coal pillar after the coal seam mining is retained. The calculation of the failure depth of the rock mass and the stress distribution of the surrounding rock under the coal pillar after mining face are calculated and analyzed. The research results have certain reference value for the reasonable arrangement position of the lower coal seam roadway.
引文
[1]张百胜.极近距离煤层开采围岩控制理论及技术研究[D].太原理工大学,2008.
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[2]齐静.近煤层开采过程中存在的一些问题及应对措施[J].能源与节能,2016(03):185-186.
[3]董旭东.回采巷道煤柱稳定性影响研究[J].山西煤炭,2013,33(07):51-53.
[4]武少鹏,翟英达.孟家窑煤矿煤柱留设研究[J].山西煤炭,2012,32(02):49-50+58.
[5]赵云虎.综放面沿空掘巷区段煤柱尺寸的优化研究[J].煤炭工程,2012(04):5-7.
[6]刘公君,黄长国,张家川.极近距离煤层煤柱集中应力在底板中传递规律研究[J].煤炭技术,2016,35(02):30-32.