基于“弹性孔理论”的巷道围岩结构失稳研究
|
摘要
开挖扰动作用下巷道围岩失稳与卸荷易诱发掘进工作面岩体大范围垮落,甚至导致围岩动力灾害,严重制约现场安全高效掘进。针对巷道围岩结构失稳问题,基于"弹性孔理论",系统总结了开挖扰动诱发片帮的4种类型,分析顶板结构、巷道围岩失稳机制;采用ABAQUS有限元数值计算软件分析巷道围岩结构失稳机理和灾变特征,巷道经过支护后,顶板运移量大幅度减小,同时减缓覆岩整体性破坏程度。结果表明,受巷道掘进扰动影响,顶板更易发生结构失稳,巷道支护能够有效阻碍覆岩顶、底板运移,缓解岩体灾变概率,动力灾害得到有效控制,巷道实现安全掘进。
The instability and unloading of roadway surrounding rock under excavation disturbance can easily induce large-scale caving of rock mass in heading face, even lead to dynamic disaster of surrounding rock, which seriously restricts safe and efficient excavation. Aiming at the instability problem of surrounding rock structure of roadway, four types of slope induced by excavation disturbance are summarized based on the elastic hole theory, and the instability mechanism of roof structure and surrounding rock of roadway is analyzed. The volume decreases greatly, and the overall failure degree of overlying strata is slowed down. The results show that the roof is more prone to structural instability under the influence of roadway disturbance. The roadway support can effectively hinder the movement of overburden roof and floor, alleviate the probability of rock mass catastrophe, effectively control the dynamic disaster, and realize the safe roadway driving.
The instability and unloading of roadway surrounding rock under excavation disturbance can easily induce large-scale caving of rock mass in heading face, even lead to dynamic disaster of surrounding rock, which seriously restricts safe and efficient excavation. Aiming at the instability problem of surrounding rock structure of roadway, four types of slope induced by excavation disturbance are summarized based on the elastic hole theory, and the instability mechanism of roof structure and surrounding rock of roadway is analyzed. The volume decreases greatly, and the overall failure degree of overlying strata is slowed down. The results show that the roof is more prone to structural instability under the influence of roadway disturbance. The roadway support can effectively hinder the movement of overburden roof and floor, alleviate the probability of rock mass catastrophe, effectively control the dynamic disaster, and realize the safe roadway driving.
引文
[1]马念杰,赵希栋,赵志强,等.深部采动巷道顶板稳定性分析与控制[J].煤炭学报,2015,40(10):2287.
[2]鞠金峰,许家林,朱卫兵,等.浅埋特大采高综采工作面关键层“悬臂梁”结构运动对端面漏冒的影响[J].煤炭学报,2014,39(7):1197-1024.
[3]黄乃斌,秦永洋,盖军.大采高倾斜长壁采场矿压规律研究[J].矿山压力与顶板管理,2005(4):81-83.
[4]王晓利,杨俊哲,李晋平,等.基于柔模支护的煤矿安全高回收开采关键技术与装备研发及工业化应用[R].西安:西安科技大学,2015.
[5]闫少宏,尹希文,许红杰,等.大采高综采顶板短悬臂梁-铰接岩梁结构与支架工作阻力的确定[J].煤炭学报,2011,36(11):1816-1820.
[6]伍永平,解盘石,王红伟,等.大倾角煤层长壁采场倾斜砌体结构与支架稳定性分析[J].煤炭学报,2012,37(8):1275-1280.
[7]韩玉明.综放工作面回风巷超前预注浆加固技术[J].煤炭科学技术,2013,41(8):42-45.
[8]郑颖人.岩土数值极限分析方法的发展与应用[J].岩石力学与工程学报,2012,31(2):1297-1316.
[9]王思敬.论岩石的地质本质性及其岩石力学演绎[J].岩石力学与工程学报,2009,28(3):433-450.
[10]曹胜根,姜海军,王福海,等.采场上覆坚硬岩层破断的数值模拟研究[J].采矿与安全工程学报,2013,30(2):205-210.
[11]徐能雄.适于数值模拟的三维工程地质建模方法[J].岩土工程学报,2009,31(11):1710-1716.
[12]钱鸣高.岩层控制的关键层理论[M].徐州:中国矿业大学出版社,2003:63-68.
[13]尹光志,李星,韩佩博,等.三维采动应力条件下覆岩裂隙演化规律试验研究[J].煤炭学报,2016,41(2):406-413.
[2]鞠金峰,许家林,朱卫兵,等.浅埋特大采高综采工作面关键层“悬臂梁”结构运动对端面漏冒的影响[J].煤炭学报,2014,39(7):1197-1024.
[3]黄乃斌,秦永洋,盖军.大采高倾斜长壁采场矿压规律研究[J].矿山压力与顶板管理,2005(4):81-83.
[4]王晓利,杨俊哲,李晋平,等.基于柔模支护的煤矿安全高回收开采关键技术与装备研发及工业化应用[R].西安:西安科技大学,2015.
[5]闫少宏,尹希文,许红杰,等.大采高综采顶板短悬臂梁-铰接岩梁结构与支架工作阻力的确定[J].煤炭学报,2011,36(11):1816-1820.
[6]伍永平,解盘石,王红伟,等.大倾角煤层长壁采场倾斜砌体结构与支架稳定性分析[J].煤炭学报,2012,37(8):1275-1280.
[7]韩玉明.综放工作面回风巷超前预注浆加固技术[J].煤炭科学技术,2013,41(8):42-45.
[8]郑颖人.岩土数值极限分析方法的发展与应用[J].岩石力学与工程学报,2012,31(2):1297-1316.
[9]王思敬.论岩石的地质本质性及其岩石力学演绎[J].岩石力学与工程学报,2009,28(3):433-450.
[10]曹胜根,姜海军,王福海,等.采场上覆坚硬岩层破断的数值模拟研究[J].采矿与安全工程学报,2013,30(2):205-210.
[11]徐能雄.适于数值模拟的三维工程地质建模方法[J].岩土工程学报,2009,31(11):1710-1716.
[12]钱鸣高.岩层控制的关键层理论[M].徐州:中国矿业大学出版社,2003:63-68.
[13]尹光志,李星,韩佩博,等.三维采动应力条件下覆岩裂隙演化规律试验研究[J].煤炭学报,2016,41(2):406-413.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |