深部复杂应力环境下脆性煤岩材料结构失稳规律试验研究  

Experimental Study on the Instability Law of Brittle Coal Rock Material Structure under Deep Complex Stress Environment

作　　者：钟雄伟 ZHONG Xiongwei(Xinjiang Energy Co.,Ltd.,CHN ENERGY)

机构地区：[1]国家能源集团新疆能源有限责任公司

出　　处：《现代矿业》2024年第12期56-59,共4页Modern Mining

摘　　要：为解决西部矿区强采动矿压显现问题,针对强采动作用下覆岩运移规律不明,且易发生顶板断裂等动载扰动活动,利用多场耦合岩体动态扰动试验系统对脆性煤岩材料进行了深部复杂应力环境力学加载试验,以研究煤样在复合加载条件下的破坏响应特性。结果表明:试样经过动静组合加载作用后,煤岩破坏裂纹增加,强度降低,呈现了声发射信号活跃、破坏剧烈、破碎体块度小的特点;动载扰动使煤样强度降低,较低频率的动载可强化煤样破坏剧烈程度,诱发煤样发生煤爆等剧烈破坏。分析结果为西部矿区强矿压显现问题治理工作提供理论参考。In order to solve the problem of strong mining pressure in the western mining area,in view of the unknown migration law of overlying strata under strong mining,and the dynamic load disturbance ac-tivities such as roof fracture,the multi-field coupling rock mass dynamic disturbance test system was used to carry out the deep complex stress environment mechanical loading test on brittle coal rock materials,so as to study the failure response characteristics of coal samples under composite loading conditions.The results show that after the combination of static and dynamic loading,the failure cracks of coal and rock increase and the strength decreases,the characteristics of active acoustic emission signal,severe damage and small fragmentation are showed.The dynamic load disturbance reduces the strength of the coal sample,and the dy-namic load with lower frequency can strengthen the damage intensity of the coal sample and induce the coal sample to undergo severe damage such as coal burst.The analysis results provide a theoretical reference for the management of strong mine pressure problems in western mining areas.

关 键 词：煤岩 动静叠加 声发射 破裂特性 

分 类 号：TG1[金属学及工艺—金属学]