掌子面前支撑压力带岩层变形破坏机制研究  

Study of mechanism of rock mass deformation and failure ahead of working face on supporting zone

作　　者：钱岳红[1,2] 王德荣[1] 李杰[1,3] 陈文涛[1] 

机构地区：[1]解放军理工大学工程兵工程学院 [2]解放军92303部队 [3]解放军65525部队

出　　处：《岩土力学》2011年第10期3058-3064,共7页Rock and Soil Mechanics

基　　金：国家自然科学杰出青年基金资助(No.50825403);国家重点基础研究发展计划(973计划)项目资助(No.2010CB732003);国家自然科学创新研究群体科学基金资助(No.51021001);水利部公益性行业科研专项项目资助(No.201001009)

摘　　要：利用岩石滑移破坏强度理论,研究地下开采时掌子面前方岩体中的应力和应变状态,分析引起支撑压力区岩体体积变化的主要因素,并通过对体积变形状态及变形结果的分析,得到深部围岩区域破裂现象的发生条件。结果显示,深部岩体工程中掌子面前支撑压力区域体积变化的主要原因是最大支撑压力区域在各向不均匀压缩的条件下产生的"分层剥离",该机制可解释分区破裂化现象。同时,根据浅部与深部岩体工程的不同特征现象,给出以单轴抗压强度表示的界定浅部与深部工程的解析表达式,并认为对于较薄的岩层,普朗特解是一种很好的近似。The shear slippage failure theory is used to study the stress-strain state in terrane ahead of working face;and then the main factors that cause volumetric deformation are analyzed.By means of the volumetric deformation state and its consequences,the mechanism of zonal disintegration phenomenon is explained and the occurrence conditions are derived.The results show that the main reason for volumetric deformation in supporting zone of deep rock mass is that the different pressure in prime stress space leads to the rock mass＇s spalling,which explains the zonal disintegration;meanwhile,according to the characters of the shallow or deep rock engineering,the computation formula containing the column strength of rock mass is used to define the shallow or deep rock engineering.As to the thin rock terrane,the Prandtl solution is a good approximate one.

关 键 词：支撑压力 剪切滑移破坏理论 深部巷道 区域破裂现象 

分 类 号：TD32[矿业工程—矿井建设] TU452[建筑科学—岩土工程]