基于煤岩结构面剪切作用下半煤岩巷变形机制及控制研究

发布时间：2018-03-16 23:05

本文选题：薄煤层　切入点：半煤岩巷道　出处：《采矿与安全工程学报》2017年03期 　论文类型：期刊论文

【摘要】：采用现场调查、数值模拟、理论分析与工业性试验等方法,总结了半煤岩巷道变形特征,指出煤帮为巷道变形破坏的薄弱环节;分析了煤岩结构面力学参数对煤帮稳定性影响,得到煤岩层间剪切变形随结构面参数的增加呈负指数关系减小;揭示了该类巷道变形机制包括煤岩结构面层间剪切破坏机制与结构面层间失稳诱发机制,指出巷道维护的关键在于控制煤岩结构面的层间剪切滑移变形;基于倾斜穿层锚索对煤岩结构面加固机制的分析,开发了以强力支护、巷帮倾斜穿层锚索为核心的围岩控制技术。工业性试验结果显示,煤岩结构面层间剪切变形得到有效控制,巷道维护效果较好。
[Abstract]:By means of field investigation, numerical simulation, theoretical analysis and industrial test, this paper summarizes the deformation characteristics of semi-coal roadway, points out that coal side is the weak link of roadway deformation and failure, and analyzes the influence of mechanical parameters of coal and rock structural plane on coal slope stability. It is concluded that the shear deformation between coal and rock decreases exponentially with the increase of structural plane parameters, and the mechanism of roadway deformation includes shear failure mechanism and instability induced mechanism. It is pointed out that the key of roadway maintenance is to control the interlayer shear slip deformation of coal and rock structure surface, and based on the analysis of the reinforcement mechanism of coal and rock structure surface by inclined anchor cable, a strong support is developed. The control technology of surrounding rock with inclined anchor cable as the core of roadway side. The industrial test results show that the shear deformation of coal and rock structure surface layer is effectively controlled and the roadway maintenance effect is better.
【作者单位】：河南理工大学能源科学与工程学院;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：中国矿业大学煤炭资源与安全开采国家重点实验室开放基金项目(SKLCRSM15KF03) 河南省教育厅科学技术研究重点项目(16A440004) 中央高校基本科研业务费专项资金项目(2011QNB01)
【分类号】：TD322;TD353

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