论文部分内容阅读
在凿井工程中,经常也会遇到多种难以处理的问题,如管井水量偏小,井孔弯曲,卡钻事故、难钻地层等。在用其它方法无能为力的情况下,采用爆破法即可缩短工期速见成效,又能节省财力、物力,使工程顺利进展。现举几例,与同行交流。基岩孔埋钻事故的爆破处理高山魏庄村基岩供水井,设计孔深220米,孔径350毫米。在施工中90米以下遇着破碎岩层,当钻至177.80米时,大块碎石塌孔,不仅埋了岩芯管钻,又从钻具以上埋了70余米。用机械起拔后,钻头脱离孔底0.8
In the sinking project, often encounter a variety of difficult to deal with problems, such as tube water is too small, borehole bending, stuck accidents, difficult to drill the formation. In the case of powerless use of other methods, the use of blasting method can shorten the duration of quick results, but also save financial and material resources, the smooth progress of the project. Cite a few examples, communicate with your peers. Blasting of Bedrock Borehole Accident Blasting Treatment of Bedrock Bedding Well in Weishan Village of High Mountain with a hole depth of 220m and a bore of 350mm. In the construction of 90 meters below the encounter broken rock formation, when the drill to 177.80 meters, large pieces of rock collapse hole, not only buried core tube drill, but also buried more than 70 meters from the drill. With mechanical lifting, the drill bit away from the bottom of the hole 0.8