新街矿区深部开采邻空巷道的破坏机理:理论分析和数值模拟
Failure mechanism of gob-side roadway in deep coal mining in the Xinjie mining area:Theoretical analysis and numerical simulation
赵毅鑫 1周金龙 2张村 1刘斌 3令春伟 1刘文超 1韩楚健4
作者信息
- 1. Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China
- 2. School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;CCTEG Coal Mining Research Institute,Beijing 100013,China;Department of Civil Engineering,Técnico Lisboa,University of Lisbon,Lisbon 1049-001,Portugal
- 3. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines(Anhui University of Science and Technology),Huainan 232001,China
- 4. School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China
- 折叠
摘要
深部煤炭开采时复杂的应力环境和开采条件容易引起巷道大变形和顶板冒落,严重威胁煤矿生产安全.本文研究了内蒙古新街矿区红庆河煤矿首采工作面开采时邻空巷道应力特征、破坏机理及围岩控制方法.建立了首采工作面不同开采阶段顶板长、短臂F型结构模型,基于基础静载荷、采动附加静载荷和扰动动载荷提出了邻空巷道围岩应力计算方法.此外,分析了邻空巷道围岩稳定性,揭示了邻空巷道破坏机理.研究结果表明:基础静载荷、采动附加静载荷和扰动动载荷叠加时形成高应力、能量区,易诱发邻空巷道破坏;煤柱宽度为5～10 m时邻空巷道处在低应力环境,可有效降低邻空巷道破坏风险.同时,提出了邻空巷道围岩控制方法,主要包括选择合理煤柱宽度、切断动载荷来源、降低静载应力集中程度及应用吸能锚杆.本文研究结果可为类似条件巷道围岩控制提供参考.
Abstract
In deep coal mining,complex stress and mining conditions often cause large deformation and roof falling of roadway,which seriously threatens the production safety of coal mines.This study investigated the stress characteristics,failure mechanism,and control methods of gob-side roadway(GSR)at Hongqinghe Coal Mine in the Xinjie deep mining area,Inner Mongolia,China.The long and short arm F-shaped roof structure models during the different mining stages for the first working face were established.The stress calculation methods for GSR surrounding rock were proposed based on foundation static load(FSL),mining-induced additional static load(MIASL),and disturbance dynamic load(DDL).Moreover,the stability of GSR was analyzed.The failure mechanism of GSR was revealed.It was concluded that the GSR failure may occur due to the high stress and energy induced by the additive effects of the FSL,the MIASL,and the DDL.The coal pillar width of 5-10 m can provide a low stress environment for GSR,conducive to reducing the risk of GSR failure.The suitable control methods for GSR were proposed,which included selecting reasonable coal pillar widths,cutting off the dynamic load sources,reducing the static load stress concentration,and application of energy-absorbing bolts.The findings may provide valuable insights for controlling roadway surrounding rock in similar conditions.
关键词
深部煤炭开采/邻空巷道/顶板结构/动静载/数值模拟Key words
deep coal mining/gob-side roadway/roof structure/dynamic and static loads/numerical simulation引用本文复制引用
基金项目
National Natural Science Foundation of China()
Project(202006430014)
China Scholarship Council(U1910206)
China Scholarship Council(51874312)
出版年
2023
NETL
NSTL
维普
万方数据