强度差异对煤岩组合体弯曲破坏断裂面的影响  

Effect of Strength Difference on the Fracture Surface of Coal-rock Assemblage Bending Deformation Damage

作　　者：张兆海 陈文晨 赵敖寒 陈德任 廉斌 杨勇 Zhang Zhaohai;Chen Wenchen;Zhao Aohan;Chen Deren;Lian Bin;Yang Yong(Otok Qianqi Great Wall No.5 Mining Co.,Ltd.,Inner Mongolia,016200;School of Safety Science and Engineering,Anhui University of Science and Technology,Anhui,232001;Shandong Huakun Geological Engineering Co.,Ltd.,Shandong,271413;Shandong Zhongxuan Machinery Equipment Co.,Ltd.,Shandong,271413)

机构地区：[1]鄂托克前旗长城五号矿业有限公司,内蒙古016200 [2]安徽理工大学安全科学与工程学院,安徽232001 [3]山东华坤地质工程有限公司,山东271413 [4]山东中选机械设备有限公司,山东271413

出　　处：《当代化工研究》2023年第6期46-48,共3页Modern Chemical Research

基　　金：2021年安徽省教育厅高校优秀青年骨干教师国外访问研修项目“预防煤矿煤与瓦斯突出的行为安全方法研究”(项目编号:gxgwfx2021019);安徽省教育厅高校自然科学研究项目“含瓦斯煤体渗吸效应及微观特征研究”(项目编号:KJ2021A0419);山东华坤地质工程有限公司企业委托开发项目“上海庙矿区采动多场演化及卸压瓦斯精准抽采技术研究”(项目编号:HX2022672297)。

摘　　要：为研究强度差异对煤岩组合体弯曲变形破坏断裂面特征的影响机制,设置煤体组合体上下岩层不同强度差,开展煤岩组合体三点弯曲实验,得到了煤岩组合体在弯曲破坏作用下的力学特征与断裂面形态特征。实验结果表明:受弯后的煤岩组合体将从岩体下部随机处产生微裂纹,最终裂纹将扩展至加载点周围。煤岩组合体在受载破坏后形成的宏观裂纹扩展至交界面处,会出现裂纹沿着交界面水平迁移的现象。In order to study the influence mechanism of strength differences on the fracture surface characteristics of coal-rock mass under bending deformation,different strength differences between the upper and lower strata of coal-rock mass were set,and the three-point bending experiment of coal-rock mass was carried out to obtain the mechanical characteristics and fracture surface morphological characteristics of coal-rock mass under bending failure.The experimental results show that microcracks will be generated randomly from the lower part of the rock mass after bending,and eventually the cracks will extend around the loading point.The horizontal migration of the macroscopic crack along the interface of the coal and rock mass formed after loading failure occurs.

关 键 词：三点弯曲 煤岩组合体 断裂面特征 弯曲破坏 

分 类 号：X936[环境科学与工程—安全科学]