基于切顶短壁梁理论的留巷围岩变形规律
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摘要
为解决深部留巷顺槽变形量过大、断面收缩严重的问题,基于切顶短壁梁理论,采用人工双十字测点现场监测和数据分析方法,研究益新煤矿43073工作面留巷顺槽围岩的变形规律。结果表明:巷道顶底板移近量变化曲线符合logistic回归分析模型,最大变形幅值为19.7%;两帮出现不对称变形,移近量呈逐渐收缩趋势。该研究可以为后续留巷和同类条件下切顶卸压自成巷技术应用提供借鉴。
This paper is aimed at addressing the excessive deformation occurring in the deep roadway retained along the roadway and serious shrinkage of the retained roadway section. The study drawing on the theory of cut-wall short-wall beam focuses on an investigation into the law behind the surrounding rock deformation of 43073 working face in Yixin coal mine using the artificial double-crossing site monitoring and data analysis method. The results show that the roadway roof and floor presents the variation curve conforming to the logistic regression analysis model,the maximum deformation amplitude of 19. 7%,and the approximation of the two sides tending to shrink gradually,accompanied by an asymmetric deformation. This research could provide a reference for the application of the roof-removing and self-forming lane technology in the subsequent roadway and similar conditions.
This paper is aimed at addressing the excessive deformation occurring in the deep roadway retained along the roadway and serious shrinkage of the retained roadway section. The study drawing on the theory of cut-wall short-wall beam focuses on an investigation into the law behind the surrounding rock deformation of 43073 working face in Yixin coal mine using the artificial double-crossing site monitoring and data analysis method. The results show that the roadway roof and floor presents the variation curve conforming to the logistic regression analysis model,the maximum deformation amplitude of 19. 7%,and the approximation of the two sides tending to shrink gradually,accompanied by an asymmetric deformation. This research could provide a reference for the application of the roof-removing and self-forming lane technology in the subsequent roadway and similar conditions.
引文
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[2]康红普,范明建,高富强,等.超千米深井巷道围岩变形特征与支护技术[J].岩石力学与工程学报,2015,34(11):2227-2241.
[3]华心祝,卢小雨,李迎富.深井大断面沿空留巷底鼓防控技术[J].煤炭科学技术,2013,41(9):100-104.
[4]巨峰,陈志维,张强,等.固体充填采煤沿空留巷围岩稳定性控制研究[J].采矿与安全工程学报,2015,32(6):936-942.
[5]朱现磊,杨仁树,蔡志炯,等.大倾角松软煤层综放开采矿压显现规律研究[J].煤炭科学技术,2014,42(5):25-28.
[6]王波.龙口海域软岩巷道围岩变形规律分析研究[D].青岛:山东科技大学,2006.
[7]陈勇.沿空留巷围岩结构运动稳定机理与控制研究[D].徐州:中国矿业大学,2012.
[8]刘振文,郝传波,付贵.巷道围岩破坏的地应力特征与数值模拟[J].黑龙江科技大学学报,2018,28(1):14-18,35.
[9]王国洪.王家岭煤矿首采工作面的矿压显现特征及关键技术研究[D].北京:中国矿业大学,2016.
[10]何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005(16):2803-2813.
[11]张俊文,郭志飚,陈炼,等.深部软岩巷道顶板冒落的机理与控制方法[J].黑龙江科技大学学报,2017,27(6):575-580.