基于加卸载响应比的小间距双硐巷道围岩稳定性研究  

Stability Analysis on Surrounding Rocks of Close-space Tunnel with Double Rooms Based on LURR

作　　者：汪令辉[1] 

机构地区：[1]铜陵有色金属集团股份有限公司冬瓜山铜矿,安徽铜陵市244031

出　　处：《矿业研究与开发》2016年第8期41-46,共6页Mining Research and Development

摘　　要：采用室内小间距双硐巷道模型试验方法研究了在分级循环三角扰动加卸载作用下,加卸载响应比理论判断小间距双硐巷道围岩稳定性,得出以下结论:随着硐2开挖会一定程度降低双硐间岩柱的稳定性;围岩位移响应比曲线变化规律不如围岩应力那样有明确的"突增-回落"现象,故以位移为响应的加卸载响应比数值作为判断围岩破坏的依据效果不佳;以所有通道撞击数作为响应的加卸载响应比曲线不能作为预测双硐模型的破坏的依据,可以采用所有通道的能量作为响应计算加卸载响应比曲线并作为判断模型破坏的依据;应用RFPA2D软件模拟小间距双硐巷道模型试验,数值模拟模型的围岩应力,位移与声发射能量的加卸载响应比曲线与室内模型试验的相应响应比曲线相似,且有着共同的规律。Through the laboratory model test on the close- space tunnel with double rooms, the stability of surrounding rocks was estimated by the LURR theory under loading/un- loading in hierarchical cycle and triangle disturbance. It con- cluded that with the mining of No. 2 room, the stability of pillar between two rooms would be decreased at a certain de- gree. The displacement curve of surrounding rock didfft have a clear ＂ up-down＂ phenomenon like the stress response curve, so the LURR value responded by displacement had a poor effect to judge the stability of the surrounding rock. The LURR responded by all the channels＂ impact numbers couldn＇t be used as the basis for predicting the failure of the double-rooms model, but all channels＂ energy can be used asa response to calculate the LURR curve and to judge the model＇s failure. Finally, RFPAzb software was applied to simulate the test. By numerical simulation on the surround- ing rock stress, the LUR.R curves responded by displace- ment and AE energy had similar rules with those in the labo- ratory model test.

关 键 词：加卸载响应比 小间距双硐巷道 室内模型试验 数 值模拟 

分 类 号：TD322.4[矿业工程—矿井建设]