caving

However, the caving maybe happen because of too large transmogrification and rheologic fracture to high crustal stres.

统一流变断裂准则，最终形成了诱导条件下节持续大规模自然崩落判据。

During course of in situ stress measurement, some problems such as core discing, minification and caving of borehole due to horizontal stress are appeared, and their mechanism is studied.

在现场地应力测量过程中发现了芯饼裂、钻孔径缩和钻孔破碎塌孔等现，分析了这些现的力学机。

It may also be referred to as "draining" (when exploring drains) "urban spelunking", "urban caving", or "building hacking".

它同样也被称为“下水道探索”，“城市洞穴探险”，“建筑探险”等等。

Practices have proved that quick advancing techniqe is applicable in isolated unmined area Comprehensive top coal caving face.

实践证明,孤岛作面快速推进技术是可行的。