Karstic collapse posts existing in North China type coalfields is a special kind of karstic collapse.
华北型煤田中发育的岩溶陷落柱是一种特殊类型的岩溶塌陷。
Mingshui spring groups are rare karstic springs in north part, which has typical rain source type characteristics.
明水泉群为我国北方罕见的岩溶大泉，具有典型的雨源型特征。
The well completion technology has good water sealing result and helpful in the karstic fissure geothermal water exploitation.
使用此成井工艺，止水效果良好，达到了开发岩溶裂隙地热水的目的。
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