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在研究喀斯特的工作中,钻探是最重要的方法之一,而对岩石的鑑定,描述和分析更是重要,笔者根据工作中的一些体会整理于后,供大家参考討論。一、現場工作Ⅰ詳細查明钻进过程中发生的異常現象,一般有下列三种不同情况:①在正常钻进过程中,钻具在本身重量作用下,突然自动陷落。发生这种情形时,冲洗液急速变化,取不上岩心。这显然說明,在钻具突然发生自动陷落的距离内是个空洞或裂隙,必须立刻
In the study of karst work, drilling is one of the most important methods, and the identification of rock, description and analysis is even more important, the author based on some of the work experience after finishing for your reference. First, on-site work Ⅰ Identify in detail the anomalies that occur during the drilling process, generally have the following three different situations: ① In the normal drilling process, the drill under its own weight suddenly subsided. When this happens, the irrigating fluid changes rapidly and can not fit the core. This clearly shows that there is a cavity or a crack within a distance where the boring tool automatically falls, and it must be immediately