论文部分内容阅读
城效煤矿副井冻结基岩段采用爆破掘进 ,长段掘砌 ,液压金属滑升模板浇筑混凝土井壁 ,取得了 2 8d成井71m的好成绩。
The Chengji coal mine auxiliary shaft frozen base rock section using blasting excavation, long sections of excavation, hydraulic metal sliding template pouring concrete shaft wall, made 28d well 71m good results.