动载作用下岩样力学特性及声发射响应特征研究  

Study on the mechanical properties and acoustic emission response characteristics of rock samples under dynamic loading

作　　者：贺煜 田超超 HE Yu;TIAN Chao-chao(Shanxi Hancheng Mining Wangfeng Mining Co.,Ltd.Yan’an 727307,China)

机构地区：[1]陕西瑞能煤业有限责任公司,陕西延安727307

出　　处：《世界有色金属》2024年第20期186-188,共3页World Nonferrous Metals

摘　　要：为解决西部矿区强矿压显现问题,针对强采动作用下采场易发生顶板断裂等动载扰动活动,结合多场耦合岩体动态扰动实验系统对岩样开展动静组合实验,探究岩样动静组合加载下破坏响应特征。实验明晰了动静组合加载条件下岩样强度及变形破坏特征。结果表明:试样经过动静组合加载作用后,岩样强度降低,岩样发生岩爆等剧烈破坏现象,岩样破碎体块度较小。不同动静组合加载条件下岩样变形破坏响应规律及声发射响应特征研究结果,为西部矿区强矿压显现问题治理工作提供理论参考。To solve the problem of strong mining pressure in western mining areas,dynamic load disturbance activities such as roof fracture are prone to occur in the mining area under strong mining action.Combined with a multi field coupled rock mass dynamic disturbance experimental system,dynamic and static combination experiments are carried out on rock samples to explore the failure response characteristics of rock samples under dynamic and static combination loading.The experiment clarified the strength and deformation failure characteristics of rock samples under dynamic and static combined loading conditions.The results showed that after being subjected to a combination of dynamic and static loading,the strength of the rock sample decreased,and severe damage phenomena such as rock burst occurred.The fragmentation of the rock sample was smaller.The research results on the deformation and failure response laws and acoustic emission response characteristics of rock samples under different dynamic and static loading conditions provide theoretical reference for the treatment of strong mining pressure in western mining areas.

关 键 词：岩石力学 动静叠加 声发射 破裂特性 

分 类 号：TU45[建筑科学—岩土工程]