破碎围岩巷道变形特征及支护参数优化
Deformation Characteristics and Supporting Parameters Optimization of Broken Surrounding Rock Roadway
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摘要: 巷道帮部破碎围岩在采动应力诱发下的动力灾害问题严重制约现场安全高效掘进。针对破碎围岩巷道帮部突然性断裂垮落致诱动力灾害问题,根据巷道地质条件和布局,考虑顶底板帮部裂隙分布规律和开采扰动影响,采用现场勘察、理论分析、数值计算和微震现场监测等手段和方法,综合分析破碎围岩巷道变形特征及支护参数优化设计。结果表明:受重力作用,岩层顶板在拉伸应力作用下拉伸应力区呈U形破坏分布,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;受巷道掘进扰动影响下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。Abstract: The dynamic disaster induced by mining stress seriously restricts the safety and efficiency of tunneling. To solve the problem of induced dynamic disaster caused by sudden collapse of the side of broken surrounding rock roadway, according to the conditions and layout of roadway, consider the roof and floor for fracture distribution and mining disturbance, the field survey and theoretical analysis, numerical calculation and field monitoring means and methods, the comprehensive analysis of crushed surrounding rock of roadway deformation characteristics and support parameters optimization is carried out. The results show that under the action of gravity, the tensile stress area of rock roof is U shaped failure distribution. After the supporting of roadway, roof migration quantity greatly decreases, and slows the overburden rock integrity damage at the same time; under the influence of roadway excavation disturbance, structural instability of roof is more likely to occur. Roadway support can effectively hinder the movement of overburden roof and floor, alleviate the probability of rock mass disaster, effectively control dynamic disaster, and realize safe roadway excavation.
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Keywords:
- broken surrounding rock /
- roadway support /
- roof instability /
- wall caving /
- safe driving
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[1] 谢和平,周宏伟,刘建锋,等.不同开采条件下采动力学行为研究[J].煤炭学报,2011,36(7):1067-1074. [2] 何学秋,窦林名,牟宗龙,等.煤岩冲击动力灾害连续监测预警理论与技术[J].煤炭学报,2014,39(8):1485-1491. [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] 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. [7] 谢和平,周宏伟,王金安,等.FLAC在煤矿开采沉陷预测中的应用及对比分析[J].岩石力学与工程学报,1999,18(4):397-401. [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] 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. [10] 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. [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] 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. [13] 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. -
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