摘要
王庄煤矿7105运输巷受自身大断面尺寸开采和井田内部地质构造运动影响,围岩破碎严重,巷道变形剧烈,严重威胁矿井的安全生产。采用现场调研、数值模拟和工业性试验等手段,总结了构造应力影响下大断面巷道围岩变形规律,揭示了巷道断面尺寸效应和构造应力强弱效应对大断面巷道围岩灾变的诱导机理;提出了以“顶板强压支护+两帮注浆加固+底角锚注阻隔”为核心技术的巷道围岩稳定控制对策,并开展了相关的工业性试验。试验结果表明:支护后的巷道在90 d后顶底板最大变形量为28 mm,两帮最大移近量为69 mm,有效解决了构造应力影响下的大断面巷道灾变问题。
The 7105 headgate in Wangzhuang Coal Mine was affected by its own large cross section mining and the geological structure movement.The surrounding rock was seriously broken and the roadway deformation was severe,which seriously threatened the safety production of the mine.By means of field investigation,numerical simulation and industrial test,the deformation law of surrounding rock of large cross section roadway under the influence of tectonic stress was summarized,and the induced mechanism of roadway section size effect and tectonic stress intensity effect on surrounding rock catastrophe of large cross section roadway was revealed;the stability control countermeasures of roadway surrounding rock with the core technology of“roof strong pressure support+two side grouting reinforcement+anchor grouting barrier at the bottom corner”were put forward,and the relevant industrial tests were carried out.The test results show that the maximum deformation of the roof and floor of the supported roadway is 28 mm and the maximum displacement of the two sides is 69 mm after 90 d,which effectively solves the disaster problem of large cross section roadway under the influence of tectonic stress.
作者
陈定超
王襄禹
赵祥岍
李冠军
张飞腾
CHEN Dingchao;WANG Xiangyu;ZHAO Xiangqian;LI Guanjun;ZHANG Feiteng(School of Mines,China University of Mining and Technology,Xuzhou 221116,China)
出处
《矿业安全与环保》
北大核心
2022年第3期15-19,25,共6页
Mining Safety & Environmental Protection
基金
国家自然科学基金项目(52174132)
江苏省研究生科研与实践创新计划项目(KYCX22_2625)
中国矿业大学未来科学家计划项目(2022WLJCRCZL012)。
关键词
大断面巷道
构造应力
尺寸效应
灾变机理
注浆加固
控制技术
large cross section roadway
tectonic stress
size effect
catastrophe mechanism
grouting reinforcement
control technology
