新元煤矿动压巷道围岩控制技术研究

发布时间：2018-07-02 07:02

本文选题：动压巷道 + 失稳机理　；参考：《中国矿业大学》2015年硕士论文

【摘要】：动压巷道围岩控制一直是煤矿安全生产必不可少的研究课题,针对此问题已有很多研究,主要包括三个方面:(1)改善巷道围岩本身的物理力学性质;(2)改善巷道围岩的应力分布状态;(3)加强巷道围岩支护强度。研究科学合理的动压巷道围岩控制技术,不仅可以保证煤矿安全生产,而且可以缓解日趋严重的煤炭资源形势。本文针对新元煤矿3107回风巷特有的生产地质条件,为能有效的保持巷道围岩的稳定,采用理论分析、数值计算结合工业性试验的研究手段,取得了以下5个方面的研究结论:(1)通过从巷道围岩岩性、巷道围岩应力分布及巷道支护强度三个方面分析动压巷道围岩失稳机理,得出软岩巷道变形规律及破坏特征及不同煤柱宽度时围岩应力分布特征。(2)通过留巷卸压技术,改善试验巷道围岩应力环境。经数值模拟分析比较了留巷卸压前后试验巷道煤柱应力分布,巷道围岩塑性区,巷道围岩变形特征,最终证实留巷卸压的有效与合理性。(3)根据试验巷道变形特点,通过数值模拟与理论分析,提出了针对性的巷道围岩变形控制措施,包括:帮部锚索,底角锚杆,高预紧力、大延伸率锚杆的使用,并通过现场实践证明其有效性。(4)根据试验巷道变形特点,通过数值模拟对试验巷道锚杆支护参数进行了优化设计,并通过现场实践证明此参数能满足安全生产要求。(5)通过现场矿压观测,证明本文设计的一系列围岩控制技术能有效的控制巷道围岩变形,满足生产要求,经济和社会效益显著。
[Abstract]:Dynamic pressure roadway surrounding rock control has always been an indispensable research topic in coal mine safety production, in view of this problem, a lot of research has been done. It mainly includes three aspects: (1) to improve the physical and mechanical properties of roadway surrounding rock; (2) to improve the stress distribution of roadway surrounding rock; (3) to strengthen the supporting strength of roadway surrounding rock. The study of scientific and reasonable control technology of surrounding rock in dynamic pressure roadway can not only ensure the safety of coal production, but also alleviate the increasingly serious situation of coal resources. In view of the special production geological conditions of 3107 return air roadway in Xinyuan Coal Mine, in order to effectively maintain the stability of surrounding rock of roadway, this paper adopts theoretical analysis and numerical calculation combined with the research means of industrial test. The conclusions are as follows: (1) the mechanism of rock instability in dynamic pressure roadway is analyzed from three aspects: lithology, stress distribution and support strength. The deformation and failure characteristics of soft rock roadway and the stress distribution characteristics of surrounding rock under different coal pillar widths are obtained. (2) the stress environment of surrounding rock in test roadway is improved by the technique of retaining roadway pressure relief. The stress distribution of coal pillar, plastic zone of surrounding rock and deformation characteristics of surrounding rock of roadway before and after decompression of roadway are analyzed and compared by numerical simulation. Finally, the validity and rationality of unloading pressure in roadway are proved. (3) according to the deformation characteristics of test roadway, Through numerical simulation and theoretical analysis, the paper puts forward the corresponding measures for controlling the surrounding rock deformation of roadway, including the use of anchor cable, anchor rod at bottom angle, high pretightening force and high elongation anchor. It is proved to be effective by field practice. (4) according to the deformation characteristics of test roadway, the parameters of bolting support in test roadway are optimized by numerical simulation. It is proved by field practice that this parameter can meet the requirements of safety production. (5) through field observation of rock pressure, it is proved that a series of surrounding rock control techniques designed in this paper can effectively control the surrounding rock deformation of roadway, meet the production requirements, and have remarkable economic and social benefits.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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