近距离煤层迎采动工作面沿空掘巷支护技术
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摘要
针对近距离煤层迎采动工作面沿空掘巷巷道在掘进过程中受到上层煤遗留煤柱、上区段工作面超前支承压力、滞后支承压力及采空区侧向支承压力的多重扰动导致的维护难题,采用理论分析和数值计算方法分析巷道各阶段受力特征,制定相应支护方案。通过井下工业性试验与全过程矿压监测,验证支护方案合理性,确定各阶段扰动具体范围及煤柱塑性破坏范围,从而为下一工作面巷道布置提供依据。
For the gob-side entry driving heading adjacent advancing coal face in close distance coal seams,the excavation process is subject to the multi-perturbation of the coal pillar left by the upper coal seam,leading support pressure of the upper section working face,the hysteresis support pressure and the lateral support pressure of the goaf. The maintenance problems are analyzed by theoretical analysis and numerical calculation,and corresponding support schemes are developed. Through the underground industrial test and the whole process of mine pressure monitoring,the rationality of support scheme is verified,the specific range of disturbances at each stage and the plastic damage range of coal pillars are determined,thereby providing a basis for the next working face roadway layout.
For the gob-side entry driving heading adjacent advancing coal face in close distance coal seams,the excavation process is subject to the multi-perturbation of the coal pillar left by the upper coal seam,leading support pressure of the upper section working face,the hysteresis support pressure and the lateral support pressure of the goaf. The maintenance problems are analyzed by theoretical analysis and numerical calculation,and corresponding support schemes are developed. Through the underground industrial test and the whole process of mine pressure monitoring,the rationality of support scheme is verified,the specific range of disturbances at each stage and the plastic damage range of coal pillars are determined,thereby providing a basis for the next working face roadway layout.
引文
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[2]王龙飞,常泽超,杨战标,等.深井近距离煤层群采空区下回采巷道联合支护技术[J].采矿与安全工程学报,2018,35(4):686-692.
[3]刘春波.马兰矿近距离煤层开采围岩采动应力分布特征分析[J].煤炭工程,2017,49(7):68-71.
[4]张农,李学华,高明仕.迎采动工作面沿空掘巷预拉力支护及工程应用[J].岩石力学与工程学报,2004,23(12):2100-2105.
[5]王猛,柏建彪,王襄禹,等.迎采动面沿空掘巷围岩变形规律及控制技术[J].采矿与安全工程学报,2012,29(2):197-202.
[6]郝登云,陈海俊,王龙.特厚煤层对采对掘巷道锚网强力支护技术研究[J].煤矿开采,2018,23(4):39-44.
[7]杨海楼,于洋,朱庆庆.对采对掘巷道围岩稳定与分段控制技术研究[J].煤炭工程,2013,45(10):11-14.
[8]于洋,梁化强,陈勇,等.对采对掘巷道时空效应与控制技术研究[J].煤炭技术,2018,37(4):18-21.
[9]颜立新.软煤层碎胀顶板巷道高预应力短锚索支护技术[J].煤炭科学技术,2010,38(8):39-43.
[10]李中伟.近距离煤层下分层大断面切巷支护技术研究[J].煤炭工程,2017,49(11):41-44.
[11]康红普,王金华,林健.高预应力强力支护系统及其在深部巷道中的应用[J].煤炭学报, 2007, 32(12):1233-1238.
[12]康红普,吴拥政,褚晓威,等.小孔径锚索预应力损失影响因素的试验研究[J].煤炭学报, 2011, 36(8):1245-1251.