摘要
以彬长矿区亭南煤矿二四盘区煤层顶板赋存有巨厚洛河组关键层、工作面实行小煤柱跳采方式为背景,利用布置的地表测线与钻孔孔口的GNSS-RTK沉陷监测装置,对工作面开采前后全过程的地表移动进行了监测。地表倾向测线的沉陷数据显示,由首采面开采引起的下沉非常小、后续开采新增下沉量较大。从孔口监测数据中得出Z1和Z2钻孔的超前影响距离,并判断2412面超前影响范围至少达到376.5 m,Z1和Z2孔口目前下沉速度分别为3.4 mm/d和2.3 mm/d。通过对3个工作面地表下沉以及水平移动动态过程的分析,发现开采范围内边界岩层会持续向采空中心移动,这种趋势和规律将在后期随着工作面开采数量的增加持续出现。
On account of the extra thick Luohe aquifer as a key stratum existing in the roof and the small-pillar skip mining method used in Panel Two-Four of Tingnan Coal Ming,surface subsidence monitoring was carried out throughout the mining process by means of survey lines set on the surface and GNSS-RTK device at the openings of boreholes.The subsidence data of the surface survey lines along dip shows that the subsidence caused by the first face is very small,and that caused by subsequent mining increases significantly.The advanced influential distance of Z1 and Z2 boreholes is obtained from monitoring data at their openings,and it is determined that the advanced influential range of Face 2412 can reach at least 376.5 m.The current speeds of subsidence of at the openings of Z1 and Z2 are 3.4 mm/d and 2.3 mm/d,respectively.Through the analysis of the dynamic process of surface subsidence and horizontal movement in three working faces,it was found that the boundary rock strata within the mining range will continue to move towards the goaf center,and this trend and pattern will continue to appear in the later stages as the number of mining faces increases.
作者
陈德峰
成晓明
于思源
潘光义
左宏强
沙海洋
CHEN Defeng;CHENG Xiaoming;YU Siyuan;PAN Guangyi;ZUO Hongqiang;SHA Haiyang(Shaanxi Changwu Tingnan Coal Industry Co.,Ltd.,Xianyang 713602,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)
出处
《陕西煤炭》
2025年第10期93-99,共7页
Shaanxi Coal
关键词
沉陷监测
小煤柱
跳采
地面沉陷规律
采空区
subsidence monitoring
small coal pillar
skip mining
surface subsidence law
goaf
