巷道底板冲击地压卸支耦合防治技术研究
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摘要
通过分析煤矿巷道底板冲击地压的破坏特点及其影响因素,提出基于卸支耦合原理的深孔区间爆破+底板锚注的底板冲击地压防治技术,利用有限差分软件FLAC~(3D)对比分析了底板无支护、底板锚注和深孔区间爆破+底板锚注时的巷道围岩应力分布及变形特征,并通过现场试验论证了深孔区间爆破+底板锚注的卸支耦合防治技术对治理底板冲击地压的可行性。结果显示,深孔区间爆破+底板锚注的卸支耦合防治技术可避免高水平应力导致底板浅部围岩能量集聚,并能有效地控制底板和两帮变形,从而防止煤矿巷道底板冲击地压的发生。
By analysis broken characters and influence elements of rock burst in roadway floor,prevention technology that include sectional blasting in deep hole and bolt-grouting of floor rock burst was put forward on the basis of release and supporting coupling theory. Detailed numerical model was conducted with FLAC3 Dto evaluate the characters of surrounding rock stress distributions and deformation in different supporting methods,which include non supporting in floor,bolt-grouting in floor,sectional blasting in deep hole and bolt-grouting in floor. The feasibility of floor rock burst prevention technology was validated by filed test. The results showed that the prevention technology could decreased energy accumulation in shallow position of floor,which induced by high stress,floor heave and two sides convergence could be controlled effectively,and then rock burst in floor would be prevented.
By analysis broken characters and influence elements of rock burst in roadway floor,prevention technology that include sectional blasting in deep hole and bolt-grouting of floor rock burst was put forward on the basis of release and supporting coupling theory. Detailed numerical model was conducted with FLAC3 Dto evaluate the characters of surrounding rock stress distributions and deformation in different supporting methods,which include non supporting in floor,bolt-grouting in floor,sectional blasting in deep hole and bolt-grouting in floor. The feasibility of floor rock burst prevention technology was validated by filed test. The results showed that the prevention technology could decreased energy accumulation in shallow position of floor,which induced by high stress,floor heave and two sides convergence could be controlled effectively,and then rock burst in floor would be prevented.
引文
[1]蓝航,齐庆新,潘俊锋,等.我国煤矿冲击地压特点及防治技术分析[J].煤炭科学技术,2011,39(1):11-15.
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[6]李浩荡,蓝航,杜涛涛,等.宽沟煤矿坚硬厚层顶板下冲击地压危险时期的微震特征及解危措施[J].煤炭学报,2013,38(1):6-11.
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[10]姜福兴,苗小虎,王存文,等.构造控制型冲击地压的微地震监测预警研究与实践[J].煤炭学报,2010,35(6):900-903.
[11]徐方军,毛德兵.华丰煤矿底板冲击地压发生机理分析[J].煤炭科学技术,2001,29(4):41-43.
[12]潘俊锋.半孤岛面全煤巷道底板冲击启动原理分析[J].煤炭学报,2012,36(2):332-338.
[13]潘俊锋,宁宇,秦子晗,等.基于冲击启动理论的深孔区间爆破疏压技术[J].岩石力学与工程学报,2012,31(7):1414-1421.
[14]罗金满.煤岩体防渗堵水加固浆液试验及应用研究[D].西安:西安科技大学,2009.
[15]刘少虹.动载冲击地压机理分析与防治实践[D].北京:煤炭科学研究总院,2013.
[16]刘少虹.动静加载下组合煤炭破坏失稳的突变模型和混沌机制[J].煤炭学报,2014,39(2):292-300.
[17]吴玉文,王书文.爆破卸压关键参数对冲击危险性变化趋势的影响规律[J].煤矿开采,2012,17(1):79-82.
[18]代长春,桂兵,吴学新.深孔爆破卸压技术在冲击地压防治中的应用[J].煤炭技术,2009,28(6):54-55
[2]齐庆新,康立军,毛德兵,等.我国冲击地压现状与研究进展[A].采矿工程学新论——北京开采所研究生论文集[C].2005.
[3]齐庆新,窦林名.冲击地压理论与技术[M].徐州:中国矿业大学出版社,2008.
[4]KARJCINOVIC D.Statistical aspects of the continuous damage theory[J].International Journal of Solids and Structures,1982,18(7):551-562.
[5]高明仕,窦林名,张农,等.冲击矿压巷道围岩控制的强弱强力学模型及其应用分析[J].岩土力学,2008,29(2):426-430.
[6]李浩荡,蓝航,杜涛涛,等.宽沟煤矿坚硬厚层顶板下冲击地压危险时期的微震特征及解危措施[J].煤炭学报,2013,38(1):6-11.
[7]陈学华.构造应力型冲击地压发生条件研究[D].阜新:辽宁工程技术大学资源与环境工程学院,2004.
[8]陈国祥.最大水平应力对冲击矿压的作用机制及其应用研究[D].徐州:中国矿业大学矿业工程学院,2009.
[9]王本强.构造应力下坚硬底板冲击地压机理分析[J].煤炭科技,2009(1):79-83.
[10]姜福兴,苗小虎,王存文,等.构造控制型冲击地压的微地震监测预警研究与实践[J].煤炭学报,2010,35(6):900-903.
[11]徐方军,毛德兵.华丰煤矿底板冲击地压发生机理分析[J].煤炭科学技术,2001,29(4):41-43.
[12]潘俊锋.半孤岛面全煤巷道底板冲击启动原理分析[J].煤炭学报,2012,36(2):332-338.
[13]潘俊锋,宁宇,秦子晗,等.基于冲击启动理论的深孔区间爆破疏压技术[J].岩石力学与工程学报,2012,31(7):1414-1421.
[14]罗金满.煤岩体防渗堵水加固浆液试验及应用研究[D].西安:西安科技大学,2009.
[15]刘少虹.动载冲击地压机理分析与防治实践[D].北京:煤炭科学研究总院,2013.
[16]刘少虹.动静加载下组合煤炭破坏失稳的突变模型和混沌机制[J].煤炭学报,2014,39(2):292-300.
[17]吴玉文,王书文.爆破卸压关键参数对冲击危险性变化趋势的影响规律[J].煤矿开采,2012,17(1):79-82.
[18]代长春,桂兵,吴学新.深孔爆破卸压技术在冲击地压防治中的应用[J].煤炭技术,2009,28(6):54-55