摘要
为解决深部含夹矸煤巷帮部大变形失稳问题,以兴隆庄煤矿10304工作面轨道巷为工程背景,综合采用现场实测、数值模拟和理论分析等方法,研究了含夹矸煤巷帮部失稳机理与强化支护技术。结果表明:含夹矸煤巷帮部失稳特征为煤体沿煤-矸界面向巷道内臌出,导致该部分煤体内的锚杆失效和破断,弱化了煤体的强度与结构完整性,进而导致巷道整体稳定性降低。控制煤-矸界面的层间剪切滑移是维护巷道稳定的关键,倾斜锚杆/索、高强锚杆/索、注浆锚杆/索、增加表面支护以及增大预紧力等强化支护技术可实现对含夹矸煤巷帮部的有效控制。现场实测效果表明,强化支护方案有效地控制了煤-矸界面剪切滑移,巷道整体变形量较小,支护体系完整可靠。
In order to solve the problem of large deformation and failure in the sidewall of a deep gangue-containing coal roadway,the mechanism of failure and strengthening support technology of roadway sidewall are studied by using field measurement,numerical simulation and theoretical analysis based on the maingate of the 10304 working face at Xinglongzhuang Coal Mine.The results show that the failure of the sidewall is characterized by the coal bulging out into the roadway along with the coal-gangue interface,which leads to the failure and breakage of the bolts in this part of the coal,weakening the structural integrity and strength of the coal body,thus leading to the reduction of the overall stability of the roadway.The key to maintaining the stability of the roadway is to control the interlayer shear slip at the coal-gangue interface.Strengthening support techniques such as inclined bolt/rope,high-strength bolt/rope,slurry bolt/rope,increase surface support and increased pretension can achieve effective control of the sidewall of the gangue-containing coal roadway.By using the strengthening support technique,the coal-gangue interface shear slip has been effectively controlled.
作者
刘虎生
栾恒杰
乔金林
李国锋
张孙豪
LIU Husheng;LUAN Hengjie;QIAO Jinlin;LI Guofeng;ZHANG Sunhao(Shangwan Coal Mine,CHN Energy Shendong Coal Group.,Ordos 017209,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Xinglongzhuang Coal Mine,Yanzhou Coal Industry Co.,Ltd.,Yanzhou 272102,China)
出处
《采矿与岩层控制工程学报》
北大核心
2022年第3期34-45,共12页
Journal of Mining and Strata Control Engineering
基金
国家自然科学基金资助项目(52104093)
山东省自然科学基金资助项目(ZR2019BEE065)。
关键词
巷道支护
含夹矸
失稳机理
强化支护
数值模拟
roadway support
gangue-containing
failure mechanism
strengthening support
numerical simulation
作者简介
刘虎生(1973—),男,内蒙古鄂尔多斯人,高级工程师,主要从事矿山压力与岩层控制等方面的研究工作。E-mail:115214971@qq.com;通信作者:栾恒杰(1989—),男,山东烟台人,讲师,硕士生导师,博士,主要从事巷道支护等方面的研究工作。E-mail:luanjie0330@126.com。
