冲击载荷作用下巷道支护围岩体系动力响应  

Roadway supporting surrounding rock system dynamic responses under impact load

作　　者：李祁[1] 王皓[1] 潘一山[2] 罗浩[2] 郑文红[2] 

机构地区：[1]辽宁工程技术大学理学院,辽宁阜新123000 [2]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2014年第2期213-217,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点基础研究发展规划(973)基金资助项目(2010CB226803);国家自然科学基金资助项目(11172121)

摘　　要：为提高深部巷道支护围岩体系的安全性,应用FLAC3D软件分析了井下巷道在冲击载荷作用下的速度响应和应力、位移演化规律,以及冲击波在支护围岩体系中的传播及衰减规律.结果表明:冲击波作用下,巷道两边帮最大水平速度达1.6m/s,U型钢支护使巷道整体支撑能力增强,同时减小了巷道变形.通过数值计算研究冲击载荷对巷道稳定性的影响,有助于进一步认识冲击载荷对深部巷道支护围岩体系作用机理.In order to improve the deep roadway supporting surrounding rock system security, this paper applied FLAC3D to analyze the speed response and stress-displacement evolution law of roadway under impact loading and shock wave propagation and attenuation in supporting surrounding rock system. The analysis shows that finite difference method used to analyze the shock wave diffraction problem in the supporting surrounding rock system is feasible. Under the effect of shock waves, the maximum speed on both sides of the roadway could reach up to 1.6m/s in horizontal direction, the U shape steel yield support enhances the support ability of roadway and reduces the deformation of roadway at the same time. Through the numerical calculation to study the effect of impact load on stability of roadway, the results will help to understand the failure mechanism of deep roadway supporting surrounding rock system under impact load.

关 键 词：冲击载荷 支护围岩体系 动力响应 数值计算 圆形巷道 速度响应 防冲支护 煤巷 

分 类 号：TD77[矿业工程—矿井通风与安全]