Lateral-vertical combined multi-dimensional freeze drilling and cutting method for soft-hard strata
A drilling-cutting and formation technology, applied in the field of flank-vertical combined multi-dimensional frozen drilling and cutting, can solve the problems of a single drilling device and cutting device, high cost, collapse of the shield tunnel opening and tool changing surface, etc., and achieve the goal of drilling Various types of cutting tools, saving construction costs, and the effect of side drilling and cutting holes
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[0052] The invention provides a flank-vertical combined multi-dimensional cryo-drilling method for soft and hard formations, comprising:
[0053] When flank drilling and cutting construction is required in water-rich soft and hard formations:
[0054] The high-strength drilling head corresponding to the telescopic arm is controlled by the annular flank drilling controller to extend into the formation vertically until the vertical drilling and cutting construction is completed;
[0055] When vertical press-in drilling and cutting construction is required:
[0056] Through a number of drill head control doors arranged at the bottom of the wear-resistant rotating chassis, the corresponding thread drill head and pentagon drill head are respectively controlled to rotate and cut the formation, and at the same time, the core is driven by the embedded sliding connection between the outer side of the central shaft and the high-strength hollow center frame. The drilling and cutting hea...
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