摘要
从韩城矿区薄隔水层条件出发,系统分析了桑树坪矿奥灰极薄隔水层水文地质特征,提出了定向钻联合常规钻在该类型隔水层防治水中的应用技术,设计定向钻孔稳斜段垂深为11#煤底板以下32 m,取钻孔在巷道外侧的距离为6 m,常规钻终孔处设计为11#煤底板以下垂深15 m,确定了最优注浆层位、注浆材料与注浆工艺,经过定向钻和常规钻的注浆探查、加固,水害防治效果显著。
Based on the analysis of extremely thin impermeable layer in Hancheng mining area,the paper researched the hydrogeological characteristics of extremely thin impermeable layer in Sangshuping Mine,put forward the water prevention and control technology of directional drilling combined with conventional drilling that the vertical depth of directional drillings are about 32 m under №11 coal seam floor and the vertical depth of conventional drillings are about 16 m under №11coal seam floor determined the optimal grouting layer,grouting materials and grouting process. By grouting and reinforcement of directional drillings and conventional drillings,the significant effect of water prevention and control is achieved.
出处
《陕西煤炭》
2015年第3期37-39,109,共4页
Shaanxi Coal
关键词
定向钻
极薄隔水层
奥灰
防治水
directional drilling
extremely thin impermeable layer
Ordovician limestone
water prevention and control
