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                首页> 《新版彩神8app》期刊 >本期导读>煤层回采过程中覆岩破坏及裂隙演化规律

                煤层回采过程中覆岩破坏及裂隙演化规律

                104    2022-03-24

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                作者:郎君

                作者单位:吕梁学院矿业工程系,山西 吕梁 033000


                关键词:矿业工程;裂隙演化;渗透特征;卸压


                摘要:

                综放开采覆岩破坏高度及裂隙演化规律对于煤矿安全生产劍樓他是不敢去具有重要意义,以山西某⊙矿为试验矿井,采用分過程中甚至有段注水、钻孔电视〗对覆岩破坏高度进行探测,对裂隙变化特征进行定量化分析,并对工作面回采过程中裂隙及应力演化进行数值模拟研々究。研究结果表明@ :采动后冒落带破坏垂直高度为29.8~34.3 m,裂隙带破坏垂直高度为83.8~88.2 m;回采前覆岩裂隙以低◣角度、小宽度为主,裂隙数量发育程度低,随着工作面的回采ㄨ覆岩裂隙数量明显增加,增加的裂隙≡以低角度、中宽度为主;覆岩的整个运动是一个动态的、连续〇的发育过程;应力呈〇现增加—减小—稳定→的变化特征;采动早已經被踐踏过程中,近煤层区域覆岩裂隙数量一直处于较高水平。


                Failure and fracture evolution of overburden rock during coal mining
                LANG Jun
                Department of Mining Engineering, Lüliang University, Lüliang 033000, China
                Abstract: The fracture height and fracture evolution law of fully mechanized caving mining are of great significance to the safety production of coal mine. Taking a mine in Shanxi as a test mine, the fault height of overburden was detected by subsection water injection and borehole television, the characteristics of fracture change were quantitatively analyzed, and the fracture and stress evolution during mining face were numerically simulated. The results show that the vertical height of failure was 29.8-34.3 m, the vertical height of fracture zone was 83.8-88.2 m; With the increase of the number of cracks in the face, the increase of cracks was mainly low angle and medium width; the whole movement of overburden was a dynamic and continuous development process; the stress shows the characteristics of increasing-decreasing-stable change; and the number of overburden fractures in the near coal seam area was always at a high level.
                Keywords: mining engineering;fracture evolution;penetration characteristics;pressure relief
                2022, 48(3):47-52,65  收稿日期: 2021-02-12;收到修改稿日期: 2021-04-16
                基金项目: 山西省高等学校科技创新项▲目资助(2019L0954)
                作者简介: 郎君(1988-),男,黑龙江大庆市人,讲师,博士,研究方向为地质工程及矿井該死防治水
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