大倾角大采高支架稳态控制失效分析  

Analysis of hydraulic powered supports dumping on the fully mechanized high mining height longwall working face in steeply dipping seam

作　　者：贠东风[1,2] 葛普 伍永平[1,2] 林勇 王震 曾庆林 李培树 黄正平 YUN Dongfeng;GE Pu;WU Yongping;LIN Yong;WANG Zhen;ZENG Qinglin;LI Peishu;HUANG Zhengping(School of Energy,Xi’an University of Science and Technology,Xi'an 710054,China;Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education,Xi’an University of Science and Technology,Xi'an 710054,China;Panzhihua Coal Co.,Ltd.,Sichuan Coal Industry Group,Panzhihua 617066,China;Huashan Coal Mine,Panzhihua Coal Co.,Ltd.,Sichuan Coal Industry Group,Panzhihua 617066,China)

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054 [3]四川省煤炭产业集团攀枝花煤业公司,四川攀枝花617066 [4]四川省煤炭产业集团攀枝花煤业公司花山煤矿,四川攀枝花617066

出　　处：《中国矿业》2020年第5期91-96,共6页China Mining Magazine

基　　金：国家自然科学基金资助项目资助(编号:51634007)。

摘　　要：大倾角煤层走向长壁综采面顶板载荷与支架重力的切向分量随工作面倾角增加而增大,但顶板载荷与支架重力的法向分量却相反,造成支架在斜面上所处的力学环境复杂、稳态控制劣化。特别是采高加大使支架重心增高、煤壁片帮加剧、架前冒顶频发,支架稳态控制难度加大甚或失效而导致支架下滑倾斜加剧或最终群体倾倒。花山煤矿6152大倾角大采高综采面就发生过因支架稳态控制失效而导致支架严重倾倒且难以扶正,工作面生产被迫中断,经济损失巨大。现场实测了支架与工作面倾角,并据此获得支架倾斜程度量化指标值——倾斜度。综合分析结果表明,导致支架群体性倾倒是由煤层倾角增加、采高加大、支架过重、煤壁片帮、架前冒顶、侧护倒置与故障、未用防倒防滑装置、拉架操作不当等多因素共同作用所致。基于大倾角煤层走向长壁工作面矿压显现特征,初步解释了工作面群体支架倾斜度大致呈正态分布现象。The tangential component of the roof load and the support gravitational gravity of the longwall fully mechanized mining face increases with the increasing of the working face angle,while the normal component is opposite,which causes the complicated mechanical environment and degraded steady state control of support on the inclined surface.In particular,the increase in the height of the support,heighten the center of gravity of the support,with the coal wall intensified,and the top of the frame prone to rise and fall,which in turn induces the difficulty of the steady state control of the support,or even the failure,resulting in the collapse of the support or the ultimate overturning.The steady-state control failure of the stent occurred in the 6152 high mining height longwall in steeply dipping seam fully mechanized mining face of Huashan coal mine,which caused the bracket to be seriously dumped and difficult to reset,and the production of the working surface is forced to be interrupted.The dip angle of the support and the working surface is measured on site and the quantitative index—inclination of the support is calculated.The comprehensive analysis results show that the dumping of the support group is mainly caused by the increase of coal seam dip angle,the increase of mining height,the overweight of the support,the inversion and failure of the side guard,the roof topping,the anti-fall and anti-skid device,and the improper operation of the pull support.Based on the characteristics of the rock pressure behavior of the longwall working face in the in steeply dipping seam,the dumping of the support is generally normal distribution.

关 键 词：大倾角 大采高 综采 液压支架 倾倒 

分 类 号：TD355[矿业工程—矿井建设]