巷道围岩破坏的地应力特征与数值模拟
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摘要
针对新立煤矿开采过程中巷道易变形破坏的问题,选取井田内-600西五区岩石运输大巷和西四区辅运大巷中三个典型测点,采用空芯包体方法测量地应力,获得井田内地应力场分布规律。利用FLAC3D数值模拟软件分析井田内-600西五区岩石运输大巷围岩的稳定性。结果表明,井田内最大主应力分别为垂向应力的2.01、2.09、2.08倍,地应力场为近西北—东南方向构造应力主导的水平构造应力场。受井田水平构造应力场的影响,巷道两帮和底板底臌变形较大,拱肩和底角处变形明显,破坏较严重。研究结果与现场实际情况相符,为井田内巷道布置和支护参数设计提供了参考依据。
This paper is concerned with the deformation and destruction of roadway in Xinli Coal Mine during mining. The research includes selecting three typical in-situ stress measurement points of-600 west five area rock haulage roadway and west four auxiliary roadway; measuring ground stress using air core inclusion ground stress measurement method; identifying the distribution law behind in-situ stress field; and thereby analyzing-600 west five area rock haulage roadway in mine field using FLAC3 Dsoftware. Results indicate that the maximum principal stress is 2. 01,2. 09,2. 08 respectively times the vertical stress; the stress field in the mine field is dominated by NW-SE horizontal tectonic stress; the greater deformation of the two sides and floor heave is due to the influence of horizontal tectonic stress field,leaving arch shoulder and bottom corner greatly deformed and seriously damaged. There is a basic agreement between the result and the actual situation in the field. It may provide an important reference for roadway layout and support parameter design in mine fields.
This paper is concerned with the deformation and destruction of roadway in Xinli Coal Mine during mining. The research includes selecting three typical in-situ stress measurement points of-600 west five area rock haulage roadway and west four auxiliary roadway; measuring ground stress using air core inclusion ground stress measurement method; identifying the distribution law behind in-situ stress field; and thereby analyzing-600 west five area rock haulage roadway in mine field using FLAC3 Dsoftware. Results indicate that the maximum principal stress is 2. 01,2. 09,2. 08 respectively times the vertical stress; the stress field in the mine field is dominated by NW-SE horizontal tectonic stress; the greater deformation of the two sides and floor heave is due to the influence of horizontal tectonic stress field,leaving arch shoulder and bottom corner greatly deformed and seriously damaged. There is a basic agreement between the result and the actual situation in the field. It may provide an important reference for roadway layout and support parameter design in mine fields.
引文
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[14]范明建,任勇杰,段昌瑞,等.深井高地应力复合岩层巷道围岩控制技术研究[J].中国矿业,2015,24(7):95-99.
[15]肖同强,支光辉,张治高.深部构造区域地应力分布与巷道稳定关系研究[J].采矿与安全工程学报,2013,30(5):659-664.
[16]秦涛,张俊文,刘刚,等.岩石加载过程中表面变形场的演化机制[J].黑龙江科技大学学报,2017,27(1):39-45.
[17]孟祥瑞,彭瑞,赵光明,等.深井软岩巷道声发射地应力测试及变形失稳机理[J].煤炭学报,2016,41(5):1086.
[18]何富连,张广超.深部高水平构造应力巷道围岩稳定性分析及控制[J].中国矿业大学学报,2015,44(3):466-476.
[19]张重远,吴满路,廖椿庭.金川三矿地应力测量及应力状态特征研究[J].岩土力学,2013(11):3254-3260.
[20]王强.口孜东矿深部地应力分布与巷道布置关系研究[D].合肥:安徽理工大学,2014.
[2]张文豪.基于地应力测定的煤层群巷道支护方案优化[J].煤炭科学技术,2013,41(12):31-34.
[3]李云鹏,张宏伟,陈莹,等.同忻井田地应力测量与回采巷道稳定性研究[J].安全与环境学报,2017,17(2):468-471.
[4]张强勇,陈旭光,林波,等.深部巷道围岩分区破裂三维地质力学模型试验研究[J].岩石力学与工程学报,2009,28(9):1757-1766.
[5]李涛,张宏伟,韩军,等.构造应力场对煤与瓦斯突出的控制作用[J].西安科技大学学报,2011,31(6):715-718.
[6]勾攀峰,韦四江,张盛.不同水平应力对巷道稳定性的模拟研究[J].采矿与安全工程学报,2010,27(2):143-148.
[7]王渭明,孙捷城,吕连勋.弱胶结软岩巷道围岩位移反演地应力研究[J].中国矿业大学学报,2016,45(3):646-652.
[8]孙玉福.水平应力对巷道围岩稳定性的影响[J].煤炭学报,2010,35(6):891-896
[9]郜进海,镐振,吕兆恒.构造应力区巷道变形破坏特征及控制技术研究[J].河南理工大学学报(自然科学版),2012,31(4):409-414.
[10]李可,张进红,张开智,等.高地应力区域动载扰动诱发深埋巷道冲击致灾机理研究[J].煤矿安全,2017,48(7):52-56.
[11]陈建功,贺虎,张永兴.巷道围岩松动圈形成机理的动静力学解析[J].岩土工程学报,2011,33(12):1964-1968.
[12]郝传波,张帅帅,肖福坤,等.应用地质雷达和钻孔窥视研究顶板裂隙分布规律[J].中国矿业,2016,25(6):95-99.
[13]蔡美峰,彭华,乔兰,等.万福煤矿地应力场分布规律及其与地质构造的关系[J].煤炭学报,2008,33(11):1248-1252.
[14]范明建,任勇杰,段昌瑞,等.深井高地应力复合岩层巷道围岩控制技术研究[J].中国矿业,2015,24(7):95-99.
[15]肖同强,支光辉,张治高.深部构造区域地应力分布与巷道稳定关系研究[J].采矿与安全工程学报,2013,30(5):659-664.
[16]秦涛,张俊文,刘刚,等.岩石加载过程中表面变形场的演化机制[J].黑龙江科技大学学报,2017,27(1):39-45.
[17]孟祥瑞,彭瑞,赵光明,等.深井软岩巷道声发射地应力测试及变形失稳机理[J].煤炭学报,2016,41(5):1086.
[18]何富连,张广超.深部高水平构造应力巷道围岩稳定性分析及控制[J].中国矿业大学学报,2015,44(3):466-476.
[19]张重远,吴满路,廖椿庭.金川三矿地应力测量及应力状态特征研究[J].岩土力学,2013(11):3254-3260.
[20]王强.口孜东矿深部地应力分布与巷道布置关系研究[D].合肥:安徽理工大学,2014.