深层软岩中硐室导巷大变形规律的数值模拟及应用  

Numerical simulation and application of large deformation law of chamber pilot roadways in deep soft rock

作　　者：茅晓辉[1] 付厚利[1] 李廷春[1] 

机构地区：[1]山东科技大学,山东青岛266510

出　　处：《中国矿业》2009年第11期69-72,共4页China Mining Magazine

基　　金：国家自然科学基金项目(59974015)

摘　　要：通过采用FLAC3D有限差分程序并结合现场实测的方法,对深层软岩硐室导巷法施工与支护技术进行了动态模拟与对比研究。系统分析了围岩应力应变分布受导硐影响的变化规律;硐室施工过程围岩与支护体共同作用下的变形规律。在此基础上,确定了硐室开挖、支护的合理参数。对于硐室导巷法施工,可以使围岩在原岩应力作用下充分产生流动变形,释放部分地应力;充分利用围岩自身的承载能力,使地应力重新分布达到新的应力平衡状态,使地压力得到有效释放与控制,有利于永久支护。再次刷大处理时,由于刷大的是围岩松动圈外圈的低应力松散带,避免了扰动深部围岩,能有效控制巷道变形。Dynamic simulation and comparative study through use of finite difference method with FLAC3D program , combination with field measurement method for deep soft rock chamber-pilot-roadway＇s construction and support technology. The variation law of rock stress and strain by the effects of chamber size changes are analyzed; the deformation law of interaction between rock and support system in the tunnel construction process are analyzed. On this basis, identified the reasonable parameters of chamber excavation and support systems. Flow deformation can be generated enough by Pilot chamber in situ, release a part of the Geo-stress and make full use of the carrying capacity of rock itself, then Geo-stress redistribute the stress to reach a new equilibrium state, so that the pressure are released effective and control , it is benefit to permanent support. Since expanding outside area is in the low stress lap of soft rock that disturbance in deep rock can be avoided and the deformation of roadway can effectively controlled also.

关 键 词：软岩 硐室导巷 变形规律 数值分析 

分 类 号：TD265[矿业工程—矿井建设]