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定向复合钻进技术在穿过破碎层时极易出现塌孔埋钻事故,针对该难题专门研制出一种新型扩孔器。从结构设计和加工工艺2个方面作了详细介绍,研制出准110 mm/准89 mm通缆扩孔器,为定向复合钻进技术应用到破碎层中提供一套新方法。
Directional composite drilling technology is very prone to tunnel collapse burial accident through the crushing layer, in order to develop a new type of reaming device for this problem. The structure design and processing technology are introduced in detail from two aspects. The quasi - 110 mm / quasi - 89 mm cable reamer has been developed to provide a new method for the application of directional composite drilling technology in the crushing layer.