地表沟谷对上湾煤矿超大采高工作面矿压显现规律影响分析
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摘要
采用实地测量、遥感分析、理论计算等方法,就神东矿区地表石灰沟对上湾煤矿8m超大采高工作面开采矿压显现影响进行了分析研究。结果表明,石灰沟对工作面整体影响范围约为950m,可划分为正常回采区、沟谷影响区、沟谷影响危险区等3个区域;工作面覆岩存在2个关键层,其中主关键层与石灰沟沟底垂直距离约为17.7m,主关键层受沟谷地貌的侵蚀影响程度不明显,主关键层保持完整且破断后容易形成稳定的"砌体梁"结构,预计工作面发生明显动载矿压灾害的危险性较小。鉴于超大采高工作面上覆岩层运移规律、矿压显现规律、顶板控制、巷道围岩控制均呈现新特点,提出了矿压监控与预测、主关键层强化、开采技术方案优化、工作面支护质量提升等系列超大采高工作面过沟谷地貌动载矿压防范措施。
By using field measurement,remote sensing analysis,theoretical calculation and other methods,the influences of surface lime gully of Shendong mining area on rock pressure behavior of working face with 8 m mining height in Shangwan Coal Mine were analyzed and studied.The results showed that the overall influencing range of lime gully was about 950 m,which could be divided into normal mining area,gully influencing area and gully influencing dangerous area;there were 2 key layers in overlying strata and the vertical dimension of main critical layer and the bottom of lime gully was about 17.7 m,the influencing degree of gully erosion on main critical layer was not obvious,and the main critical layer could maintain integrity and form a stable structure of voussoir beam after breaking,so the risk of obvious dynamic loading rock pressure disaster was low.Aiming at the new features of overlying stratum moving law,rock pressure behavior,roof controlling and roadway surrounding rock controlling of working face with extra large height,a series of precautionary measures for dynamic loading rock pressure brought by surface gully landform in working face with extra large mining height were put forward,including rock pressure monitoring and predicting,main critical layer strengthening,mining technology optimization and face timbering quality promotion.
By using field measurement,remote sensing analysis,theoretical calculation and other methods,the influences of surface lime gully of Shendong mining area on rock pressure behavior of working face with 8 m mining height in Shangwan Coal Mine were analyzed and studied.The results showed that the overall influencing range of lime gully was about 950 m,which could be divided into normal mining area,gully influencing area and gully influencing dangerous area;there were 2 key layers in overlying strata and the vertical dimension of main critical layer and the bottom of lime gully was about 17.7 m,the influencing degree of gully erosion on main critical layer was not obvious,and the main critical layer could maintain integrity and form a stable structure of voussoir beam after breaking,so the risk of obvious dynamic loading rock pressure disaster was low.Aiming at the new features of overlying stratum moving law,rock pressure behavior,roof controlling and roadway surrounding rock controlling of working face with extra large height,a series of precautionary measures for dynamic loading rock pressure brought by surface gully landform in working face with extra large mining height were put forward,including rock pressure monitoring and predicting,main critical layer strengthening,mining technology optimization and face timbering quality promotion.
引文
[1]王海军.神东矿区8m以上超大采高综采工作面技术探讨[J].煤炭技术,2014(10)
[2]许家林,朱卫兵,王晓振等.沟谷地形对浅埋煤层开采矿压显现的影响机理[J].煤炭学报,2012(2)
[3]王方田,屠世浩,张艳伟等.冲沟地貌下浅埋煤层开采矿压规律及顶板控制技术[J].采矿与安全工程学报,2015(6)
[4]张志强,许家林,刘洪林等.沟深对浅埋煤层工作面矿压的影响规律研究[J].采矿与安全工程学报,2013(4)
[5]张志强,许家林,王露等.沟谷坡角对浅埋煤层工作面矿压影响的研究[J].采矿与安全工程学报,2011(4)
[6]张志强,许家林,王晓振等.沟谷地形下浅埋煤层工作面矿压规律研究[J].中国煤炭,2011(6)
[7]黄庆享.浅埋煤层长壁开采顶板控制研究[D].中国矿业大学,1998
[8]王旭锋.冲沟发育矿区浅埋煤层采动坡体活动机理及其控制研究[D].中国矿业大学,2009
[9]钱鸣高,缪协兴,何富连.采场“砌体梁”结构的关键块分析[J].煤炭学报,1994(6)
[10]钱鸣高,缪协兴,许家林等.岩层控制的关键层理论[M].徐州:中国矿业大学出版社,2000
[11]许家林,钱鸣高.覆岩关键层位置的判别方法[J].中国矿业大学学报,2000(5)
[12]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010
[13]杨本生,张磊.覆岩关键层位置的快速判别及来压预测[J].煤炭工程,2013(7)
[14]邢平伟,宋选民,付玉平等.神东大采高超长工作面矿压显现强度预测研究[J].中国煤炭,2009(8)
[2]许家林,朱卫兵,王晓振等.沟谷地形对浅埋煤层开采矿压显现的影响机理[J].煤炭学报,2012(2)
[3]王方田,屠世浩,张艳伟等.冲沟地貌下浅埋煤层开采矿压规律及顶板控制技术[J].采矿与安全工程学报,2015(6)
[4]张志强,许家林,刘洪林等.沟深对浅埋煤层工作面矿压的影响规律研究[J].采矿与安全工程学报,2013(4)
[5]张志强,许家林,王露等.沟谷坡角对浅埋煤层工作面矿压影响的研究[J].采矿与安全工程学报,2011(4)
[6]张志强,许家林,王晓振等.沟谷地形下浅埋煤层工作面矿压规律研究[J].中国煤炭,2011(6)
[7]黄庆享.浅埋煤层长壁开采顶板控制研究[D].中国矿业大学,1998
[8]王旭锋.冲沟发育矿区浅埋煤层采动坡体活动机理及其控制研究[D].中国矿业大学,2009
[9]钱鸣高,缪协兴,何富连.采场“砌体梁”结构的关键块分析[J].煤炭学报,1994(6)
[10]钱鸣高,缪协兴,许家林等.岩层控制的关键层理论[M].徐州:中国矿业大学出版社,2000
[11]许家林,钱鸣高.覆岩关键层位置的判别方法[J].中国矿业大学学报,2000(5)
[12]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2010
[13]杨本生,张磊.覆岩关键层位置的快速判别及来压预测[J].煤炭工程,2013(7)
[14]邢平伟,宋选民,付玉平等.神东大采高超长工作面矿压显现强度预测研究[J].中国煤炭,2009(8)