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井筒揭含水(气)层岩段时须采取必要的措施,既要防止岩石与瓦斯突出,同时还要考虑防水的措施,在主要论述防止岩石与瓦斯突出的基础上,综合考虑了防水的一些预防措施。
When the wellbore is exposed to water (gas) bedrock segments, necessary measures must be taken to prevent the rock and gas outburst and waterproofing measures should also be taken into consideration. Based on the prevention of rock and gas outburst, a number of waterproofing measures Precaution.