| 动力挠动对回采巷道冲击危险的数值模拟 |
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| 引用本文： | 陈国祥,窦林名,高明仕,牟宗龙.动力挠动对回采巷道冲击危险的数值模拟[J].采矿与安全工程学报,2009,26(2). |
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| 作者姓名： | 陈国祥 窦林名 高明仕 牟宗龙 |
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| 作者单位： | 中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏,徐州,221008 |
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| 基金项目： | 国家自然科学基金，国家科技支撑计划，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 煤矿开采过程中,顶板断裂等动力挠动常会导致冲击矿压等动力现象的发生.根据弹性力学理论,探讨了扰动波诱发煤层巷道冲击的机理.采用有限差分软件FLAC20模拟程序中动态模块,研究分析了挠动波在不同加载水平、挠动波强度以及频率影响下,从巷道一侧上方传入时内、外帮围岩的应力和塑性区动态响应变化情况,对开采工作面巷道内帮易发生冲击的现象进行了分析和解释.研究表明:动力扰动不仅使巷道周边煤体发生层裂破坏降低其侧向约束阻力,而且在煤体中形成了高应力.处于工作面支承压力带内的巷道内帮煤体,相比外帮而言,受到动力挠动时其最大垂直和水平应力上升较快,开采过程中更易发生冲击.
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| 关 键 词： | 冲击矿压 动力挠动 巷道 动态响应 内帮 |
Numerical Simulation of Dynamic Vibration Affecting Rock Burst in Mining Gateway Caused by Tremor |
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| CHEN Guo-xiang,DOU Lin-ming,GAO Ming-shi,MU Zong-long.Numerical Simulation of Dynamic Vibration Affecting Rock Burst in Mining Gateway Caused by Tremor[J].Journal of Mining and Safety Engineering,2009,26(2). |
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| Authors: | CHEN Guo-xiang DOU Lin-ming GAO Ming-shi MU Zong-long |
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| Affiliation: | School of Mines;State Key Laboratory of Coal Resources and Mine Safety;China University of Mining& Technology;Xuzhou;Jiangsu 221008;China |
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| Abstract: | Dynamic vibration resulted from hard roof breaking often cause rock burst during coal mining.Based on the elastic theory,we discussed the mechanism of roadway burst in coal seam caused by dynamic vibration,studied the dynamic response of the vibration wave in plastic area under different loading and vibration intensity using the dynamic module of FLAC2D program,analyzed and explained the reason why rock burst is easy to take place within the working face roadway.The result indicates that 1) dynamic vibratio... |
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| Keywords: | rock burst dynamic vibration gateway dynamic response inner coal wall |
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