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深井软弱围岩巷道多重耦合控制技术研究

Research on multiple coupling control technology of deep mine roadway with soft surrounding rock

  • 摘要: 针对深井软岩巷道围岩变形破坏严重、巷道支护困难的问题,以邢东矿-980 m大巷为工程背景,综合运用现场实测、理论分析、数值建模、工业性试验等研究手段,对巷道围岩破坏机制及控制技术展开了针对性研究。分析了不同水平应力对巷道围岩破坏的影响,揭示了-980 m大巷变形破坏机制,提出了“断面优化+高预应力锚杆索+高强可缩性环形支架+滞后注浆加固”的多重耦合控制方案,并通过了现场工业性试验验证,结果表明:该控制技术可有效解决深井高水平应力巷道围岩变形控制难题,可为类似深井软岩巷道围岩大变形控制提供借鉴。

     

    Abstract: In view of the serious deformation and failure of deep mine roadway with soft surrounding rock and the difficulty of roadway support, based on the engineering background of Xingdong Coal Mine -980 m main roadway, by means of the field survey, theoretical analysis, numerical modeling, industrial test and other research means, the failure mechanism and control technolgy of surrounding rock were studied.The influence of different horizontal stress on the failure of roadway surrounding rock were analyzed, the deformation failure mechanism of -980 m main roadway was revealed. A multiple coupling control scheme was proposed, which was composed of "section optimization + high prestressed anchor cable + high-strength contractible ring support + delayed grouting", an it was verified by field industrial test. The results show that the control technology can effectively solve the problem of surrounding rock deformation control of roadway with high horizontal stress in deep mine, and can provide reference for deformation control of similar deep mine soft rock roadway.

     

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