摘要
在现场调查和理论分析的基础上,根据最小应力原理确定了东怀煤矿3I01工作面进风巷沿空掘巷小煤柱宽度.同时,针对软弱顶底板条件下沿空掘巷小煤柱护巷围岩变形特征和应力场分布特点,提出了以控制“大结构”稳定为核心的锚杆、金属网、H型钢带、锚索和桁架锚索的非对称联合支护技术.通过数值模拟和现场应用验证了小煤柱宽度的合理性以及提出的技术对软弱顶底板沿空掘巷巷道围岩稳定性控制的可靠性,对软弱顶底板条件下的沿空掘巷及其围岩控制技术具有一定的参考价值.
On the basis of site investigation and theoretical analysis,according to the principle of minimum stress to determine the width of narrow coal pillar of roadway driven along goaf of one coal mine 3I01 working face intake airflow roadway.Meanwhile,for surrounding rock deformation features and stress distribution characteristics under weak roof condition of roadway driven along goaf narrow pillar,the anchor bolt,metal mesh,H-steel belt,anchor cable and truss-cable asymmetric combined support technology is proposed to control the“great structure”stable as the core.Finally,numerical simulation and field application validate the reasonableness of the width of small coal pillar,the reliability of the technology proposed for controlling the weak roof and floor roadway along goaf roadway surrounding rock,and a certain reference value for narrow coal pillar of roadway driven along goaf and its surrounding rock control technology.
作者
李立新
王平
刘海
蒋运良
刘燕翔
崔梓墨
薛闯
任恒
Li Lixin;Wang Ping;Liu Hai;JiangYunliang;Liu Yanxiang;Cui Zimo;Xue Chuang;Ren Heng(Baise Guangxi Mining Group Co.,Ltd.,Baise 533000,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines,Hunan University of Science and Technology,Xiangtan 411201,China;School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《矿业工程研究》
2020年第1期26-32,共7页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51804114,51774130)
湖南科技大学科研启动基金资助项目(E51770)
湖南科技大学矿业工程博士后研究基金资助项目(E61803)。
关键词
软弱顶底板
小煤柱
沿空掘巷
合理宽度
weak roof and floor
narrow coal pillar
roadway driven along goaf
rational width
