摘要
利用Comsol4.2a有限元多物理场耦合软件,"动态"剖分模型采掘空间,通过计算识别塑性损伤判据函数F'≥0的区域,最终模拟模拟了在不同采掘扰动范围、不同含水层与断层水压力影响下巷道围岩发生塑性损伤变化情况,结果显示:岩体水压不变时,采掘扰动形成的应力集中区的塑性损伤范围大于采场底板,且随着采场宽度的延伸,围岩在垂向及水平方向塑性损伤范围增大;采场宽度不变时,随着岩体水压的增大,导致围岩力学强度降低,塑性破坏范围增大,且断层带内塑性损伤加剧。
The article simulates rock plastic damage change situations under the influence of different mining disturbance scope, differ- ent aquifers and fault water pressure through identifying the area of plastic damage function F＇≥ 0, by using ＂ Dynamic＂ model mining space in Comsol4.2a multi -physics coupling software. The resuhs showed that the plastic damage scope in stress concentration zone where was formed by mining disturbance was greater than the mining floor, and with an extension of the scope of mining, the scope of plastic failure zone in the rock surrounding including the vertical and horizontal was increased ; with the increase of water pressure, the surrounding rock mechanical strength decreased, and the increase scope of the plastic collapse, and plastic damage increased within the fault zone.
出处
《煤矿安全》
CAS
北大核心
2014年第3期171-174,共4页
Safety in Coal Mines
基金
国家自然科学基金重点资助项目(51034003)
"十二五"国家科技支撑计划课题资助项目(2012BAC10B03)
2011年陕西省13115科技创新工程资助项目(2011KTZB01-02)
中国煤炭科工集团有限公司科技创新基金资助项目(2013ZD002)
关键词
流固耦合
塑性损伤
巷道变形
水压
巷道围岩
采掘拢动
应力集中
fluid - solid coupling
plasticity damage
roadway deformation
water pressure
surrounding rock of roadway
mining dis-turbance
stress concentration
