山西经坊煤矿采空塌陷形成机理及防治对策研究
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摘要
以山西省经坊煤矿采空区塌陷为例,在前人研究的基础上,根据野外地质调查结果,结合钻孔揭露、构造发育、岩石的力学性质、煤层深厚比等对矿区的地面塌陷的形成机制进行了研究。结果表明,该矿三处地面塌陷处的回采工作面直接顶为分层厚度较厚的薄层状砂质泥岩或泥岩夹薄层细粒砂岩,老顶为K8砂岩,抗压强度大,采空区形成后,地面变形强烈,从而形成地面塌陷;构造的发育会促进地层变形加快,增大变形范围,扩大地表塌陷区域,井田内3处采空塌陷附近均有断层及(或)陷落柱发育。并结合矿区实际,提出地面塌陷的预防和治理措施,对煤矿的可持续发展有一定的现实意义。
Taking the mining subsidence in the Jingfang coalmine,Shanxi Province as an example,on the basis of previous studies,according to the field geological investigation results,combining with drilling data,structural development,rock mechanical property and coal seam depth/thickness ratio carried out studies on mine area surface subsidence formation mechanism.The result has demonstrated that below 3 places of surface subsidence,production faces immediate roof is flaggy sandy mudstone with thicker slices or mudstone intercalated with thin fine-grained sandstone;main roof is K8 sandstone with large compressive strength,when the gob area is formed and caused violent surface deformation,thus surface subsidence will be formed.The development of structures will accelerate strata deformation,expand deformation range and surface subsidence area,so that near the 3 places of surface subsidence in the minefield have developed faults and/or subsided columns.Based on mine area practical situation,surface subsidence prevent and governing countermeasures put forward,that has certain operation significance in coalmine sustainable development.
Taking the mining subsidence in the Jingfang coalmine,Shanxi Province as an example,on the basis of previous studies,according to the field geological investigation results,combining with drilling data,structural development,rock mechanical property and coal seam depth/thickness ratio carried out studies on mine area surface subsidence formation mechanism.The result has demonstrated that below 3 places of surface subsidence,production faces immediate roof is flaggy sandy mudstone with thicker slices or mudstone intercalated with thin fine-grained sandstone;main roof is K8 sandstone with large compressive strength,when the gob area is formed and caused violent surface deformation,thus surface subsidence will be formed.The development of structures will accelerate strata deformation,expand deformation range and surface subsidence area,so that near the 3 places of surface subsidence in the minefield have developed faults and/or subsided columns.Based on mine area practical situation,surface subsidence prevent and governing countermeasures put forward,that has certain operation significance in coalmine sustainable development.
引文
[1]山西省煤炭地质114勘查院.山西省长治经坊煤业有限公司矿井水文地质补充勘探报告[R].山西长治:山西省煤炭地质114勘查院,2011.
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[3]刘建忠,韩德军,等.煤矿采空区的灾害预防与生态修复措施[J].中国矿业,2008,17(8).
[4]王彬,邓瑞杰,等.我国煤矿地面塌陷分析与防治[J].陕西煤炭,2010,3.
[2]张长敏.煤矿采空塌陷特征与危险性预测研究-以北京西山地区为例[D].中国地震局地质研究所,2009.
[3]刘建忠,韩德军,等.煤矿采空区的灾害预防与生态修复措施[J].中国矿业,2008,17(8).
[4]王彬,邓瑞杰,等.我国煤矿地面塌陷分析与防治[J].陕西煤炭,2010,3.
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