摘要
曲江西立风井井口标高+43.5m,灰岩段(±0m^-464.9m)岩石硬度系数f=10~12,原直眼单阶同深掏槽形式炮眼利用率在灰岩中仅有45%~60%,严重影响施工进度,为提高施工进度,根据岩石硬度及裂隙发育情况,优化掏槽方式,保证施工进度,完成进度目标。
With well head elevation +43.5 m, limestone section (±0 m --464.9 m) and rock hardness coefficient f=10-12, shothole utilization rate of original parallel single order of same depth cut is only 45%-60% limestone in air shaft, West Qujiang, which seriously affects the construction schedule. In order to improve the construction schedule, cutting mode has been optimized in accordance with rock hardness and fracture develop- ment situation, which ensures the construction progress and completion of progress target.
出处
《江西煤炭科技》
2013年第4期39-41,共3页
Jiangxi Coal Science & Technology
关键词
立井灰岩段施工
直眼单阶不同深掏槽
直眼二阶同深掏槽
shaft limestone section construction
parallel single order of different depth cut
parallel second order of same depth cut