论文部分内容阅读
在鑽探施工中,需根据不同的岩层性質,选择适合的鑽进方法。实践証明,七級以下岩石应采用合金鑽进,八級以上岩石应采用钢砂鑽进。但我队在鋼砂鑽进与合金鑽进互換时,易引起夹鑽甚而导致埋鑽事故。为此,我队采用了增大外鉋槽合金鑽头鑽进的方法,經过松北区队501机和505机的多次試驗,基本杜絕了鋼砂換合金或合金换鋼砂鑽进时所引起的夹鑽事故。
In drilling construction, according to different rock properties, choose the appropriate drilling method. Practice has proved that rock should be less than seven alloy drilling, rock more than eight should be used grit drilling. However, when drilling and grit drilling interchangeable with grit, our team could easily lead to the formation of sandblasted or even lead to burying accidents. For this reason, our team adopted the method of increasing the drilling bit of the outer-gouge alloy drill. After many tests of 501 machines and 505 machines of Songbei District, it basically eliminated the grit to change the alloy or alloy for Grit drilling When caused by the folder drill accident.