千米深井大变形软岩巷道围岩控制技术应用实践
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摘要
为了实现千米深井软岩巷道的围岩控制,针对口孜东矿埋深大、岩性软、地应力高等复杂地质条件导致巷道变形大且支护困难的现状,依据地应力测试结果,对比分析了锚网类复合支护和钢管混凝土支护下围岩的破坏方式,提出采用锚架充支护技术并成功应用于实践。实践应用表明,采用锚架充支护技术可有效控制巷道围岩变形,巷道返修率大大降低,巷修人员减少75%以上,经济和社会效益显著提高。
For the purpose of realizing the control of surrounding rock in large deformation soft rock roadway in kilometer deep mine with the complex conditions such as the large buried depth,softness of rock mass and high in-situ stress in Kouzidong Mine,according to the in-situ stress test results,the destruction modes of steel tubular confined concrete support and compound support system of rock bolting and anchor net were compared,the technique of U-shaped bolting steel-filling support system was put forward and successfully implemented.The practical results showed that the application of U-shaped bolting steel-filling support system can effectively control the deformation of roadway surrounding rock,and the roadway repairing rate was greatly reduced and the number of roadway repair works was reduced by more than 75%,which resulted in significant improvement of economic and social benefits.
For the purpose of realizing the control of surrounding rock in large deformation soft rock roadway in kilometer deep mine with the complex conditions such as the large buried depth,softness of rock mass and high in-situ stress in Kouzidong Mine,according to the in-situ stress test results,the destruction modes of steel tubular confined concrete support and compound support system of rock bolting and anchor net were compared,the technique of U-shaped bolting steel-filling support system was put forward and successfully implemented.The practical results showed that the application of U-shaped bolting steel-filling support system can effectively control the deformation of roadway surrounding rock,and the roadway repairing rate was greatly reduced and the number of roadway repair works was reduced by more than 75%,which resulted in significant improvement of economic and social benefits.
引文
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[5]康红普,牛多龙,张镇等.深部沿空留巷围岩变形特征与支护技术[J].岩石力学与工程学报,2010(10)
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[7]严红,何富连,徐腾飞.深井大断面煤巷双锚索桁架控制系统的研究与实践[J].岩石力学与工程学报,2012(11)
[8]王卫军,侯朝炯.回采巷道底臌力学原理及控制研究新进展[J].湘潭矿业学院学报,2003(1)
[9]罗琼.深部沿空留巷围岩变形特征与支护技术[J].煤炭技术,2015(5)
[10]李德行,王恩元,李忠辉等.煤巷掘进过断层应力变化规律数值模拟研究[J].煤炭技术,2016(8)
[11]周军伟.强构造应力环境巷道围岩变形机理与控制技术研究[D].安徽理工大学,2012
[12]李冰冰,陈国忠,方伟.“三高”环境下的深井软岩巷道围岩控制技术[J].建井技术,2009(5)
[13]刘涛,方伟,李冰冰.深井软岩巷道锚网索喷+注浆复合支护技术[J].建井技术,2013(2)