掘采扰动下坚硬顶板半煤岩巷道围岩破坏特征分析及支护实践  

Failure Characteristics of Surrounding Rock and Support Practice in Half Coal Rock Roadway with Hard Roof Under Excavation Disturbance

作　　者：潘欢欢 查文华[1,2] PAN Huanhuan;ZHA Wenhua(School of Energy Resources and Safety,Anhui University of Science and Technology,Huainan,Anhui 232001,China;School of Civil and Architectural Engineering,East China University of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南市232001 [2]东华理工大学土木与建筑工程学院,江西南昌330013

出　　处：《矿业研究与开发》2020年第8期97-102,共6页Mining Research and Development

基　　金：国家自然科学基金资助项目(51964002,51474005);安徽省重点研究和开发计划资助项目(1804b06020361).

摘　　要：针对坚硬顶板半煤岩巷道的破坏及稳定性问题,以新生矿90103材料巷为研究对象,通过理论分析,建立了巷道基本顶结构力学模型,分析了其受力特征,为巷道顶板支护提供了依据。采用数值模拟,分析了掘采扰动下巷道围岩应力及塑性区的变化,并确定了巷道超前支承压力分布特征,提出了回采期间巷道加强支护方案。工程实践表明:采用优化的支护方案后,相对于原有支护方案,巷道顶板及两帮最大变形量减小,支护效果较好,有效保证了巷道围岩的稳定。Aiming at the destruction and stability of half coal rock roadway with hard roof,taking 90103 material roadway of Xinsheng mine as the research object,the mechanical model of the basic roof structure of the roadway was established through theoretical analysis,and its mechanical characteristics were studied for the roof support of roadway.The variation characteristics of the surrounding rock stress and the plastic zone of the roadway under the excavation disturbance were analyzed by numerical simulation.Then,the distribution characteristics of the advanced support pressure of roadway were determined,and the strengthening roadway support schemes during stoping were put forward.The engineering practice shows that compared with the original support scheme,the maximum deformation in roof and two sides of roadway is reduced,the support effect is better,and the stability of roadway surrounding rock is effectively ensured.

关 键 词：半煤岩巷道 掘采扰动 坚硬顶板 围岩稳定性 

分 类 号：TD313.1[矿业工程—矿井建设]