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动力扰动下深部巷道卸压孔与锚杆联合支护的数值模拟

ISSN号：1672-7207
期刊名称：《中南大学学报：自然科学版》
时间：0
分类：TD353[矿业工程—矿井建设]
作者机构：[1]贵州大学矿业学院,贵州贵阳550025, [2]贵州大学贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025
相关基金：国家科技支撑计划项目（2012BAB08B06）; 国家自然科学基金资助项目（50934006）; 贵州省自然科学研究重点项目（黔教科2010003）; 贵州省优秀科技教育人才省长资金项目（黔省专合字（2011）36号）; 贵州省高层次人才科研条件特助经费项目（TZJF-2010年044号）; 贵州大学引进人才科研项目（贵大人基合字（2010）008号）; 贵州大学矿业学院研究生创新基金资助项目（2012008）

关键词：动力扰动, 深部巷道, 卸压钻孔, 联合支护, 数值模拟, dynamic disturbance, deep roadway, pressure-released hole, combined support, numerical simulation

中文摘要：

为探索动力扰动下深部巷道围岩稳定的控制方法,在分析钻孔卸压作用机理的基础上探讨卸压孔与锚杆联合支护技术。结合某一巷道围岩,采用RFPA^2D-Dynamic数值软件,在模拟静载荷作用下巷道破坏机理的基础上,模拟和分析动载荷作用下巷道围岩动态损伤破坏发展以及围岩中应力场重新分布的过程,揭示动力扰动下深部巷道卸压孔与锚杆联合支护的作用机理。研究结果表明：卸压孔与锚杆联合支护使巷道围岩自身形成承载结构并使高应力向深部转移,改善围岩中的应力环境,取得较理想的支护效果。因此,卸压孔与锚杆联合支护技术的研究对寻求深部巷道围岩稳定的控制方法具有重要的参考价值。

英文摘要：

In order to study the stability control method for deep roadway with dynamic disturbance, a supporting technology of pressure-released hole combined support with rockbolt was investigated based on the analysis of the mechanism of pressure-released hole of roadway. Based on a certain roadway surrounding rock, in the simulation of failure mechanism of roadway under static loading, the development of dynamic damage and failure within surrounding rock and the redistribution of stress field around deep tunnel were simulated and analyzed, and the mechanism of pressure-released hole combined support with rockbolt within surrounding rock around deep tunnel with dynamic disturbance was revealed by using of rock failure process analysis（RFPA^2D–Dynamic） code. The results show that pressure-released hole combined support with rockbolt in deep roadway with dynamic disturbance make surrounding rock itself form a bearing structure and transfer the high stress to deep surrounding rockmass. The stress environment within rockmass around deep tunnel was improved, and better supporting effect can be made by using of the technology of borehole combined support with rockbolt in result. Therefore, it is of important reference value to investigate the supporting technology of pressure-released hole combined support with rockbolt for the method of controlling the stability in deep roadway.

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