To settle loose bed, quick sand and ingress of groundwater are trouble some problems during coalmine construction.
如何解决煤矿建井中的松散层、流沙和地下渗(涌)水是目前建井工程中的棘手问题。
The reducing in water production of tube well is a familiar problem, especially in the loose bed of the quaternary system.
管井出水量减少是常见的问题，特别是第四系松散层中的管井更为普遍。
Moreover, there are some other influencing factors such as: thick loose bed, surface mining degree, impel speed of working face, coal mining and roof manage methods, mining procedure and time.
此外，厚松散层、地表采动程度、工作面推进速度、采煤方法与顶板管理方法、开采程序及时间因素等对采场覆岩空间结构均有一定影响。
Upward flow is injected via screen plate periodically, allowing the lift of bed layer to be loose and flow to drop (or stop rising).
通过筛板周期地鼓入上升水流，使床层升起松散，接着水流下降(或停止上升)。
In a black bowler hat, and a black suit that hung loose on his bowed shoulders, Dr. Ascher looked like an invalid forced from his bed by an emergency.
阿谢尔博士戴了一顶黑色的礼帽，身上一套黑衣服宽松地披在两个塌陷的肩膀上，看样子就象个碰到紧急情况被迫从病床上爬起来的病人。
In a black bowler hat, and a black suit that hung loose on his bowed shoulders, Dr. Ascher looked like an invalid forced from his bed by an emergency.
阿谢尔博士戴了一顶黑色的礼帽，身上一套黑衣服宽松地披在两个塌陷的肩膀上，看样子就象个碰到紧急情况被迫从病床上爬起来的病人。
应用推荐