巨厚砾岩诱发冲击地压相似材料模拟试验研究
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摘要
为探究深井巨厚砾岩下覆岩运动规律以及冲击地压发生机理,针对华丰煤矿巨厚砾岩覆岩运动引起的冲击地压灾害现状,运用实验室相似材料模拟试验方法,研究采场上覆岩层运动规律及巨厚砾岩诱发采场冲击地压危险性。结果表明,随着工作面的推进,采场上覆岩层破坏基本是以"拱"的形式不断向前和向上发展,在巨厚砾岩层处离层高度及跨度发展到最大;上覆巨厚砾岩离层垮落是诱使采场冲击地压发生的根本原因。在此基础上,提出华丰煤矿防治冲击地压的根本措施巨厚砾岩离层空隙注浆充填技术。
Aiming at dealing with the current situation of rock burst induced by super-thick conglomerate layer movement in Huafeng coal mine,the law of stratum movement and risk of rock burst caused by overlying thick conglomerate strate were studied with the method of similar material simulation test.The results show that fracture of overlying rock strata is developed in the form of "arch",and abscission layer height and span develop the maximum at the thick conglomerate layer.Also,abscission caving of overlying thick conglomerate strate is the fundamental cause of rock burst.On this basis,technology of grouting bed separation was put forward as an important measure for preventing the rock burst.
Aiming at dealing with the current situation of rock burst induced by super-thick conglomerate layer movement in Huafeng coal mine,the law of stratum movement and risk of rock burst caused by overlying thick conglomerate strate were studied with the method of similar material simulation test.The results show that fracture of overlying rock strata is developed in the form of "arch",and abscission layer height and span develop the maximum at the thick conglomerate layer.Also,abscission caving of overlying thick conglomerate strate is the fundamental cause of rock burst.On this basis,technology of grouting bed separation was put forward as an important measure for preventing the rock burst.
引文
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[2]章梦涛,宋维源,潘一山.煤层注水预防冲击地压的研究[J].中国安全科学学报,2003,13(10):69-71.ZHANG Meng-tao,SONG Wei-yuan,PAN Yi-shan.Study on water pouring into coal seam to prevent rock-burst[J].China Safety Science Journal,2003,13(10):6971.
[3]朱卓慧,赵伏军,叶洲元.基于距离判别分析法的冲击地压预测研究[J].中国安全科学学报,2008,18(3):41-45.ZHU Zhuo-hui,ZHAO Fu-jun,YE Zhou-yuan.Prediction of rock burst in mining based on distance discriminant analysis method[J].China Safety Science Journal,2008,18(3):4145.
[4]何全洪.砾岩运动与冲击地压的关系探讨[J].矿山压力与顶板管理,2003(4):95-96.HE Quan-hong.The relationship between the impact pressure and conglomerate movement[J].Ground Pressure and Strata Control,2003(4):9596.
[5]郭惟嘉,孔令海,陈绍杰,等.岩层及地表移动与冲击地压相关性研究[J].岩土力学,2009,30(2):447-451.GUO Wei-jia,KONG Ling-hai,CHEN Shao-jie,et al.Correlation between rock burst and movement of strata and ground surface[J].Rock and Soil Mechanics,2009,30(2):447451.
[6]齐利伟,李宝富,梁向辉,等.上覆巨厚砾岩层失稳诱发重力型冲击地压研究[J].煤,2012,21(6):1-3.QI Li-wei,LI Bao-fu,LIANG Xiang-hui,et al.Gravity impact pressure study of overlying thick conglomerate layer caused by instability situation[J].Coal,2012,21(6):13.
[7]史红,姜福兴.采场上覆大厚度坚硬岩层破断规律的力学分析[J].岩石力学与工程学报,2004,23(18):3066-3069.SHI Hong,JIANG Fu-xing.Mechanical analysis of rupture regularity of hard and massive overlying strata of longwall face[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(18):30663069.
[8]滕永海,阎振斌.采动过程中覆岩离层发育规律的研究[J].煤炭学报,1999,24(1):25-28.TENG Yong-hai,YAN Zhen-bin.Study on law of overburden split developping in mining process[J].Journal of China Coal Society,1999,24(1):2528.
[9]窦林名,许家林,陆菜平,等.离层注浆控制冲击矿压危险机理探讨[J].中国矿业大学学报,2004,33(2):145-149.DOU Lin-ming,XU Jia-lin,LU Cai-ping,et al.Study of controlling rock burst with grouting bed separation[J].Journal of China University of Mining&Technology,2004,33(2):145149.
[10]朱学军,魏中举,赵铁鹏.离层注浆技术在冲击地压防治中的应用[J].中国矿业,2011,20(11):67-70.ZHU Xue-jun,WEI Zhong-ju,ZHAO Tie-peng.Application of grouting bed separation technology in the prevention and control of rock burst[J].China Mining Magazine,2011,20(11):6770.
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