Pilot tunnel chambering suspension cutting TBM for inclined shaft and construction method

Abstract

The invention discloses a pilot tunnel chambering suspension cutting TBM for an inclined shaft and a construction method. The problem that in the prior art, the inclined shaft pilot tunnel chamberingsuspension cutting efficiency is low is solved. The pilot tunnel chambering suspension cutting TBM for the inclined shaft comprises a central main beam and a suspended-cutting and expanded-excavatingcutter head, the front end of the central main beam penetrates through the center of the suspended-cutting and expanded-excavating cutter head and is provided with a pilot tunnel supporting shoe, thepart, located behind the suspended-cutting and expanded-excavating cutter head, of the central main beam is connected with a propelling system, a driving supporting shoe device and a safety supportingshoe device, and the tail part of the safety supporting shoe device is connected with a rear matching sleeve. According to the pilot tunnel chambering suspension cutting TBM for the inclined shaft and the construction method, aiming at pilot tunnel expanding excavation from top to bottom, the suspended-cutting and expanded-excavating cutter head is adopted for conducting suspended cutting excavation layer by layer on a rock stratum around a pilot tunnel, the cutting and expanding excavation efficiency is improved, the suspended-cutting and expanded-excavating cutter head changes the traditional TBM hob rolling rock breaking principle, the characteristic that the rock shearing strength is far smaller than the uniaxial compressive strength and free face rock breaking is utilized, a suspended cutting hob is adopted for rock breaking, and the rock breaking efficiency and the rock breaking specific energy are improved.

Description

technical field [0001] The invention relates to the technical field of inclined shaft construction, in particular to a pilot hole reaming suspension cutting TBM for inclined shafts and a construction method. Background technique [0002] The traditional raise drilling rig method is mostly used in the construction of large-slope inclined wells in China. The excavation of the inclined shaft section with large diameter (>7 meters) is divided into three steps: 1. Drilling a pilot hole with a diameter of about 200 mm; A pilot hole with a diameter of about 3 meters is excavated by means of a disk; 3. Radially drill holes in the pilot hole, and excavate to a set diameter by drilling and blasting. The main problem of the traditional raising drilling method lies in the third step. The blasting operation in long inclined shafts has great potential safety hazards. At the same time, the drilling and blasting operation has a large disturbance to the surrounding rock, and the quality ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the above-mentioned background technology, the present invention proposes a kind of pilot hole reaming suspension cutting TBM and construction method for inclined shafts, which solves the problem of low efficiency of inclined shaft pilot hole expansion and excavation in the prior art

Images