深部巷道围岩卸压协调控制技术

发布时间：2018-08-02 07:29

【摘要】：为解决深部高应力巷道围岩支护难维护问题,综合采用现场实测、数值计算、理论分析及工业性试验等方法,基于深部巷道钻孔卸压机理、钻孔参数确定方法及卸压钻孔与支护结构作用关系的分析,提出深部巷道围岩卸压协调控制技术,包括一次让压、钻孔卸压和二次高强锚注支护等3方面:一次让压支护使围岩产生恒阻变形,降低卸压引起的支护结构非协调受力;钻孔卸压的作用是转移巷道周边高应力,补偿围岩变形,减小巷道径向收敛;二次高强锚注支护为卸压协调控制技术的核心,目的是控制卸压后破碎岩体的后期蠕变。工程应用效果表明,该技术可有效控制深部巷道围岩大变形,具有一定的推广应用价值。
[Abstract]:In order to solve the problem of difficult maintenance of surrounding rock support in deep and high stress roadway, the methods of field measurement, numerical calculation, theoretical analysis and industrial test are adopted synthetically, based on the mechanism of borehole pressure relief in deep roadway. The determination method of borehole parameters and the analysis of the relationship between the pressure relief borehole and the supporting structure are analyzed, and the coordinated control technology of the surrounding rock pressure relief in the deep roadway is put forward, including the primary pressure transfer. The three aspects of borehole pressure relief and secondary high strength bolt-grouting support are as follows: the primary pressure relief support causes constant resistance deformation of surrounding rock, reduces the uncoordinated force of supporting structure caused by unloading pressure, and the function of borehole pressure relief is to transfer high stress around roadway and compensate for surrounding rock deformation. Reducing radial convergence of roadway, secondary high strength bolting and grouting support is the core of pressure relief coordinated control technology, the purpose of which is to control the later creep of broken rock mass after decompression. The results of engineering application show that this technique can effectively control the large deformation of surrounding rock in deep roadway and has certain value of popularization and application.
【作者单位】：河南理工大学深井瓦斯抽采与围岩控制技术国家地方联合工程实验室;徐州矿务集团有限公司张双楼煤矿;中煤科工集团重庆研究院有限公司;
【基金】：国家自然科学基金资助项目(51674101) 河南理工大学博士基金资助项目(B2016-54) 国家级大学生创新创业训练计划项目(201610460063)
【分类号】：TD353

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