沿空掘巷窄煤柱应力计算方法研究
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摘要
分析工作面侧向覆岩移动规律,提出上覆岩层弯曲下沉带三角形结构。通过理论分析,提出不同岩性顶板条件下沿空掘巷窄煤柱载荷的计算公式,在柳巷煤矿中硬顶板条件下,采高11.05m,巷道宽度4.86m,高度3.42m,煤柱宽度10m,计算得煤柱应力2.78MPa,现场煤柱中布置4个钻孔应力计,监测数据平均值为2.83MPa,窄煤柱应力理论计算值是现场监测数据的98%,基本吻合。
The overlying strata movement principle along lateral of working face was analyzed,and then triangle structure of bending and subsidence belt of overlying strata was put forward.According theoretical analysis,the formula of narrow pillar loading of gob side entry under different roof condition was put forward,based on the roof condition of Liuxiang coal mine,mining height was 11.05 m,roadway width 4.86 m,hight was 3.42 m,coal pillar width was 10 m,and then coal pillar stress 2.78 MPa was derived,about four borehole stressmeters were layout in coal pillar in field,the average monitoring data was 2.83 MPa,the theoretical value was about 98% of field monitoring data.
The overlying strata movement principle along lateral of working face was analyzed,and then triangle structure of bending and subsidence belt of overlying strata was put forward.According theoretical analysis,the formula of narrow pillar loading of gob side entry under different roof condition was put forward,based on the roof condition of Liuxiang coal mine,mining height was 11.05 m,roadway width 4.86 m,hight was 3.42 m,coal pillar width was 10 m,and then coal pillar stress 2.78 MPa was derived,about four borehole stressmeters were layout in coal pillar in field,the average monitoring data was 2.83 MPa,the theoretical value was about 98% of field monitoring data.
引文
[1]侯朝炯,李学华.综放沿空掘巷围岩大、小结构的稳定性原理[J].煤炭学报,2001,26(1):1-7.
[2]柏建彪,黄汉富.综放沿空掘巷围岩控制机理及支护技术研究[J].煤炭学报,2000,25(5):478-481.
[3]李学华.综放沿空掘巷围岩稳定控制原理与技术[M].徐州:中国矿业大学出版社,2008.
[4]李栖凤.无煤柱开采[M].北京:煤炭工业出版社,1986.
[5]张源,万志军,李付臣,等.不稳定覆岩下沿空掘巷围岩大变形机理[J].采矿与安全工程学报,2012,29(4):451-458.
[6]岳帅帅,孙浩,庞龙龙,等.大采高综放开采沿空掘巷矿压显现特征分析[J].煤矿安全,2016,47(1):192-195.
[7]康立军,冯增强.南屯矿63上10综放工作面沿空掘巷矿压显现规律探讨[J].煤炭科学技术,1998(7):41-45.
[8]王德超,李术才,王琦,等.深部厚煤层综放沿空掘巷煤柱合理宽度试验研究[J].岩石力学与工程学报,2014,33(3):539-548.
[9]王卫军,冯涛,侯朝炯,等.沿空掘巷实体煤帮应力分布与围岩损伤关系分析[J].岩石力学与工程学报,2002,21(11):590-593.
[10]张科学.深部煤层群沿空掘巷护巷煤柱合理宽度的确定[J].煤炭学报,2011,36(S1):28-35.
[11]苏海.深部综放大断面沿空掘巷小煤柱尺寸优化及控制技术[J].煤矿开采,2015,20(2):39-42.
[12]赵国贞,马占国,孙凯,等.小煤柱沿空掘巷围岩变形控制机理研究[J].采矿与安全工程学报,2010,27(4):517-521.
[13]杨吉平.沿空掘巷合理窄煤柱宽度确定与围岩控制技术[J].辽宁工程技术大学学报(自然科学版),2013(1):39-43.
[14]张广超,何富连.大断面强采动综放煤巷顶板非对称破坏机制与控制对策[J].岩石力学与工程学报,2016,35(4):806-818.
[15]秦海忠.采动影响留巷煤柱内沿空掘巷强力锚网索支护技术[J].煤矿开采,2012,17(2):69-72.
[16]张志青,王国龙,康健婷.采动影响下窄煤柱沿空掘巷支护技术研究[J].煤炭工程,2016,48(2):83-86.
[17]徐军,神文龙,李思超,等.残留煤柱沿空掘巷围岩应力场及位移场分布[J].煤矿安全,2015,46(12):38-41.
[18]张广超,何富连.大断面综放沿空巷道煤柱合理宽度与围岩控制[J].岩土力学,2016,37(6):1721-1728.
[19]华心祝,刘淑,刘增辉,等.孤岛工作面沿空掘巷矿压特征研究及工程应用[J].岩石力学与工程学报,2011,30(8):1646-1651.
[20]张源,万志军,程敬义,等.支护强度对沿空掘巷煤柱稳定性影响[J].辽宁工程技术大学学报,2013(4):443-448.
[21]靖洪文,王猛,汪小东,等.综放沿空煤巷不同支护方式围岩变形演化规律的数值模拟[J].辽宁工程技术大学学报(自然科学版),2009,28(6):869-872.
[22]陆士良.无煤柱护巷的矿压显现[M].北京:煤炭工业出版社,1982.
[23]吴健,孙恒虎.巷旁支护载荷和变形设计[J].采矿与安全工程学报,1986(2):2-11.
[24]孙恒虎,赵炳利.沿空留巷的理论与实践[M].北京:煤炭工业出版社,1993.
[25]孙恒虎,吴健.沿空留巷的矿压规律及岩层控制[J].煤炭学报,1992(1):15-24.
[26]李化敏.沿空留巷顶板岩层控制设计[J].岩石力学与工程学报,2000,19(5):651–654.
[27]李迎富,华心祝,蔡瑞春.沿空留巷关键块的稳定性力学分析及工程应用[J].采矿与安全工程学,2012,29(3):357-364.
[28]涂敏.沿空留巷顶板运动与巷旁支护阻力研究[J].辽宁工程技术大学学报(自然科学版),1999,18(4):347–351.
[29]Mark,C.,1987,Analysis of Longwall Pillar Stability,Ph.D. Thesis,PA State Univ.,University Park,PA,414pp.
[30]Mark C.(2006).The evolution of intelligent coal pillar design :1981-2006.Proceedings of 25th International Conference on Ground Control in Mining,Morgantown,WV: West Virginia University,2006,Aug:325-334.
[2]柏建彪,黄汉富.综放沿空掘巷围岩控制机理及支护技术研究[J].煤炭学报,2000,25(5):478-481.
[3]李学华.综放沿空掘巷围岩稳定控制原理与技术[M].徐州:中国矿业大学出版社,2008.
[4]李栖凤.无煤柱开采[M].北京:煤炭工业出版社,1986.
[5]张源,万志军,李付臣,等.不稳定覆岩下沿空掘巷围岩大变形机理[J].采矿与安全工程学报,2012,29(4):451-458.
[6]岳帅帅,孙浩,庞龙龙,等.大采高综放开采沿空掘巷矿压显现特征分析[J].煤矿安全,2016,47(1):192-195.
[7]康立军,冯增强.南屯矿63上10综放工作面沿空掘巷矿压显现规律探讨[J].煤炭科学技术,1998(7):41-45.
[8]王德超,李术才,王琦,等.深部厚煤层综放沿空掘巷煤柱合理宽度试验研究[J].岩石力学与工程学报,2014,33(3):539-548.
[9]王卫军,冯涛,侯朝炯,等.沿空掘巷实体煤帮应力分布与围岩损伤关系分析[J].岩石力学与工程学报,2002,21(11):590-593.
[10]张科学.深部煤层群沿空掘巷护巷煤柱合理宽度的确定[J].煤炭学报,2011,36(S1):28-35.
[11]苏海.深部综放大断面沿空掘巷小煤柱尺寸优化及控制技术[J].煤矿开采,2015,20(2):39-42.
[12]赵国贞,马占国,孙凯,等.小煤柱沿空掘巷围岩变形控制机理研究[J].采矿与安全工程学报,2010,27(4):517-521.
[13]杨吉平.沿空掘巷合理窄煤柱宽度确定与围岩控制技术[J].辽宁工程技术大学学报(自然科学版),2013(1):39-43.
[14]张广超,何富连.大断面强采动综放煤巷顶板非对称破坏机制与控制对策[J].岩石力学与工程学报,2016,35(4):806-818.
[15]秦海忠.采动影响留巷煤柱内沿空掘巷强力锚网索支护技术[J].煤矿开采,2012,17(2):69-72.
[16]张志青,王国龙,康健婷.采动影响下窄煤柱沿空掘巷支护技术研究[J].煤炭工程,2016,48(2):83-86.
[17]徐军,神文龙,李思超,等.残留煤柱沿空掘巷围岩应力场及位移场分布[J].煤矿安全,2015,46(12):38-41.
[18]张广超,何富连.大断面综放沿空巷道煤柱合理宽度与围岩控制[J].岩土力学,2016,37(6):1721-1728.
[19]华心祝,刘淑,刘增辉,等.孤岛工作面沿空掘巷矿压特征研究及工程应用[J].岩石力学与工程学报,2011,30(8):1646-1651.
[20]张源,万志军,程敬义,等.支护强度对沿空掘巷煤柱稳定性影响[J].辽宁工程技术大学学报,2013(4):443-448.
[21]靖洪文,王猛,汪小东,等.综放沿空煤巷不同支护方式围岩变形演化规律的数值模拟[J].辽宁工程技术大学学报(自然科学版),2009,28(6):869-872.
[22]陆士良.无煤柱护巷的矿压显现[M].北京:煤炭工业出版社,1982.
[23]吴健,孙恒虎.巷旁支护载荷和变形设计[J].采矿与安全工程学报,1986(2):2-11.
[24]孙恒虎,赵炳利.沿空留巷的理论与实践[M].北京:煤炭工业出版社,1993.
[25]孙恒虎,吴健.沿空留巷的矿压规律及岩层控制[J].煤炭学报,1992(1):15-24.
[26]李化敏.沿空留巷顶板岩层控制设计[J].岩石力学与工程学报,2000,19(5):651–654.
[27]李迎富,华心祝,蔡瑞春.沿空留巷关键块的稳定性力学分析及工程应用[J].采矿与安全工程学,2012,29(3):357-364.
[28]涂敏.沿空留巷顶板运动与巷旁支护阻力研究[J].辽宁工程技术大学学报(自然科学版),1999,18(4):347–351.
[29]Mark,C.,1987,Analysis of Longwall Pillar Stability,Ph.D. Thesis,PA State Univ.,University Park,PA,414pp.
[30]Mark C.(2006).The evolution of intelligent coal pillar design :1981-2006.Proceedings of 25th International Conference on Ground Control in Mining,Morgantown,WV: West Virginia University,2006,Aug:325-334.