煤矿安全2019，Vol.50Issue(6)：258-262,5.DOI:10.13347/j.cnki.mkaq.2019.06.062
下伏煤层空巷对上覆煤层开采的影响
Influence of Empty Roadway in Underlying Coal Seam on Mining of Overlying Coal Seam
摘要
Abstract
To study the problem of overlying coal seam working face passing through empty roadway in underlying coal, based on the accident of floor water inrush from the 1002 face of Ji’anda Coal Mine, the influence of empty roadway in underlying coal on overlying coal mining and evolutionary process of floors passing through the empty roadway was analyzed. The results show that after the mining of 10# coal seam, the depth of damage of the floor is 5.54 m, which is larger than the spacing of coal seams by 5.4 m. The empty roadway in underlying coal threatens the water inrush of the overlying coal seam mining. The stress concentration area penetrates the empty roadway when the overlying coal seam working face is 0 m from the empty roadway, the range reaches the maximum, the stress value is the largest at 4 m; when the working face passing through the empty roadway 0 m, 4 m, 8 m, the plastic zone of the left side, roof and right side of the empty roadway goes through the floor successively, and the penetrating width is 2 m, 4 m and 8 m. At this time, the surrounding rock of the empty roadway is destroyed in a large area, floor water inrush occurs extremely easily.关键词
下伏空巷/上覆煤层/突水/数值模拟/应力演化/塑性区Key words
empty roadway in underlying coal/overlying coal/water inrush/numerical simulation/stress evolution/plastic zone分类
矿业与冶金引用本文复制引用
WEI Wensheng,LI Chunyuan,SI Yanlong,DU Huayi,MAO Xinhua..下伏煤层空巷对上覆煤层开采的影响[J].煤矿安全,2019,50(6):258-262,5.基金项目
国家重点研发计划资助项目(2016YFC0600708) （2016YFC0600708）
中央高校基本科研业务费专项资金资助项目(2011YZ05) （2011YZ05）
