大口径工程钻探孔内掉物事故处理技术在大口径钻探施工中，经常会发生转盘大小方补心、垫叉、管钳以及大小手锤等掉入孔内，还有孔壁掉块，以及地表卵、块石在钻进过程中跟下去。诸如此类事故，如不及时处理，或处理不得当，将诱发更大的事故，甚至造成钻孔的报废。本人通... Drilling accidents in drill holes in large-caliber projects In large-diameter drilling constructions, there are often discontinuities such as turntable-sized bushings, forks, pipe clamps, and size hammers, as well as holes in the hole wall. Surface eggs and stones follow in the drilling process. Such accidents, if they are not dealt with in time or handled improperly, will induce even bigger accidents and even result in the scrapping of boreholes. I personally...