摘要
研究了九顶山铜钼矿2 480 m水平201采场出矿巷道开挖后的二次应力分布及巷道变形机制。首先根据现场工程地质勘查和室内岩石力学试验对巷道围岩进行了岩石力学参数确定;在此基础上运用FLAC3D数值模拟软件研究了巷道开挖后的应力应变状态,分析了围岩变形机制。研究结果表明,围岩条件不同的出矿巷道其二次应力分布影响范围有所差异,但围岩主应力总体上表现为由巷道边墙中下部位的压应力集中带逐步过渡到拱顶、底板一定范围内的拉应力集中带。
The secondary stress distribution and deformation mechanism of excavated ore-drawing roadway of Level 2 480,Stope 201 in Jiudingshan copper-molybdenum mine are studied. Firstly,rock mechanical parameters of the wall rocks of tunnel are determined by field engineering geological investigation and indoor rock mechanics experiments. The state of stress after the excavation of ore-drawing roadway is simulated by FLAC^3D before the wall rock deformation mechanism is analyzed. The results show that the secondary stress distribution with different wall rock conditions differs in distribution ranges; but the principal stress distribution transits from compressive stress centralized in mid and lower part of mining tunnel sidewalls to tensile stress centralized in mining tunnel vault and floor.
出处
《黄金》
CAS
2014年第10期38-42,共5页
Gold
基金
国家"十二五"科技支撑计划课题(2012BAB08B02)
高等学校博士学科点专项科研基金项目(20110006130003
2011000612002)
关键词
崩落采矿法
出矿巷道
二次应力分布
变形机制
数值模拟
caving method
ore-drawing roadway
secondary stress distribution
deformation mechanism
numerical simulation
