摘要
晋城矿区15#煤层顶板为巨厚坚硬石灰岩顶板,为掌握其运动规律,有效地指导150煤层工作面的安全回采,以151301工作面为试验对象,运用深基点位移法,通过工作面采动前后,基点位移的变化反映顶板的运动情况。结果表明:始动点的位置位于工作面前方1.5m左右,观测基点在垂直方向上的变化,反映了始动点的位置向工作面后方的转移情况。在工作面后方7m范围内,基点位移速率变化缓慢;后方7~15m,基点位移速率变化较大;后方15m之后,基点位移速率变化进一步变缓。
To grasp the movement rules of extra--thick--and--hard limestone roof in 15# Seam at 151301 work ing face, the author presents the a the initial moving point transfers to pplication of deep base point displacement method, whose results show that the rear of the working face with the change of observation base point in ver- tical direction when lying in about 1. 5 m ahead of working face the rate of base point displacement changes slowly when the initial moving point lies in the range of 7 m behind the working face while the rate of base point displacement changes greatly in range of 7~15 m and changes gradually in range of 15 m.
出处
《江西煤炭科技》
2015年第4期122-124,共3页
Jiangxi Coal Science & Technology
关键词
石灰岩顶板
深基点
顶板运移
现场实测
limestone roof
deep base point
roof displacement
field measurement