大柳塔煤矿大采高工作面沿空留巷围岩控制研究  

Study on surrounding rock control of gob-side entry retaining in working face with large mining height in Daliuta Coal Mine

作　　者：李星达 周海丰 冯志忠 LI Xingda;ZHOU Haifeng;FENG Zhizhong(Daliuta Coal Mine,China Energy Shendong Coal Group Co.,Ltd.,Yulin,Shaanxi 719315,China)

机构地区：[1]国能神东煤炭集团有限责任公司大柳塔煤矿,陕西省榆林市719315

出　　处：《中国煤炭》2023年第S02期202-214,共13页China Coal

摘　　要：当前煤炭资源逐渐向深部转移,原岩压力增加,护巷煤柱宽度也渐增大,造成煤炭资源严重浪费,因此沿空留巷作为一种安全经济的开采技术在行业内广泛应用。由于沿空留巷受到二次采动影响,巷道服务期间变形量大、变形时间长,为保证沿空留巷围岩稳定,需重点关注巷道的支护能力。针对沿空留巷存在的上述问题,通过使用FLAC^(3D)数值模拟以及理论分析,研究了大柳塔煤矿52606大采高工作面运输巷沿空留巷两次回采期间的围岩应力变化规律,通过数值模拟分析了巷道原始支护与补强支护时的变形情况,从而验证补强支护的必要性与支护方案的可行性;通过数值模拟分析对比5种柔模墙宽度的方案,从而确定沿空留巷柔模墙宽度值为1.5 m。At present,coal resources are gradually transferring towards the deep,with an increase in original rock pressure and in the width of coal pillars for roadway protection,resulting in serious waste of coal resources.Therefore,gob-side entry retaining as a safe and economic mining technology is widely used in the industry.Due to the impact of secondary mining on the gob-side entry retaining,the roadway deformation is large and the deformation time is long during the service period,in order to ensure the stability of the surrounding rock of the gob-side entry retaining,it is necessary to focus on the support capacity of the roadway.In response to the above problems in the gob-side entry retaining,FLAC^(3D) numerical simulation and theoretical analysis methods were used to study the stress changes in the surrounding rock of the gob-side entry retaining for transportation roadway at 52606 working face with large mining height in Daliuta Coal Mine during the twice mining periods,and the roadway deformations with the original support and reinforcement support were analyzed through numerical simulation,thus verifying the necessity of reinforcement support and the feasibility of the support scheme.Through numerical simulation analysis and comparison of five schemes of the width of flexible formwork walls,it was determined that the width of the flexible formwork wall for gob-side entry retaining was 1.5 m.

关 键 词：大采高工作面 沿空留巷 围岩控制 数值模拟 大柳塔煤矿 

分 类 号：TD353[矿业工程—矿井建设]