深部高应力软岩巷道让抗耦合控制技术  

Yield-resistance Coupling Control Technology for Roadway in Deep High Stress Soft Rock

作　　者：李荣健[1] 邓祖林 LI Rongjian;DENG Zulin(Chongqing Vocational Institute of Engineering, Chongqing 402260, Chin;Institute No.280, China National Nuclear Corporation, Guanghan 618300, China)

机构地区：[1]重庆工程职业技术学院,重庆402260 [2]中核集团核工业二八0研究所,四川广汉618300

出　　处：《煤矿安全》2018年第4期80-84,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(50127402)

摘　　要：深部井巷工程及采场的环境地应力水平较高,围岩表现出大变形、高地压、难支护的软岩特征。以赵固二矿Ⅰ盘区运输大巷为工程背景,结合该巷道硐室结构复杂、地压应力集中、围岩变形量大等现状,通过钻孔窥视、雷达探测及室内试验等手段,总结了深部高应力软岩巷道的变形特征与破坏机理;在此基础上,运用"初次锚注让压、二次刚性封闭"的耦合支护思想,制定了高应力软岩巷道让抗耦合关键控制技术,并通过FLAC^(3D)仿真模拟分析了原方案与耦合方案下的控制效果。结果表明,采用让抗耦合的分阶段支护方案,能够使围岩与支护体系协调变形,同时改善围岩与支护结构的受力状态,达到巷道稳定的目的。Surrounding rock of deep mine engineering and stope have the characteristics of soft rock, such as large deformation,high pressure and difficult to support. Taking the main haulage roadway of Zhaogu Coal Mine as engineering background,combined with the project status of complex chamber structure, large ground pressure stress, and large surrounding rock deformation, failure characteristics and mechanism of surrounding rock were discussed according to the methods of borehole imaging, radar detection, and laboratory test. Based on the coupling support ideas of ＂bolt-grouting first and rigid closed last＂, a joint control technology of roadway construction was formulated, and the control effect of two kinds of schemes was studied. The results show that the coupling control scheme can make coordinate deformation of surrounding rock and supporting system, and improve the stress state of surrounding rock and supporting structure, achieve the objective of stability of roadway.

关 键 词：高应力软岩 软岩巷道 耦合理论 控制技术 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]