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A pilot hole reaming tbm for inclined shaft and its construction method

A technology for inclined shafts and pilot tunnels, which is applied in the direction of earthwork drilling, mining equipment, tunnels, etc. It can solve the problems of low construction efficiency of inclined shafts, improve the stability of cutting and step change, reduce potential safety hazards, and improve construction safety Effect

Active Publication Date: 2022-04-29
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • A pilot hole reaming tbm for inclined shaft and its construction method
  • A pilot hole reaming tbm for inclined shaft and its construction method
  • A pilot hole reaming tbm for inclined shaft and its construction method

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Embodiment 3

[0032] Embodiment 3: A construction method for a TBM with a pilot hole reaming for an inclined shaft as described in Embodiment 2, the steps are as follows: S1. Align the pilot hole support shoe 101 with the pilot hole 200 and tighten it on the inner wall of the pilot hole , to provide stable support for the TBM; when the TBM is excavating rock, the conical expanding cutterhead 102 rotates, and under the action of the propulsion force, the hob on the conical expanding cutterhead 102 penetrates into the rock to break the rock. During TBM rock-breaking excavation, the over-excavation hob part 204 of the conical expanding cutter head 102 stretches out to excavate the rock formations around the pilot tunnel in advance, and then the hobs on the conical expanding cutter head 102 excavate the surrounding rock formations of the pilot tunnel. The rock formation is excavated layer by layer again, and the slag generated during the excavation process enters the pilot tunnel under the actio...

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Abstract

The invention discloses a pilot hole reaming TBM for inclined shafts and a construction method, which solves the problem of low construction efficiency of inclined shafts in the prior art. The TBM for guide hole reaming for inclined shafts of the present invention comprises a mounting saddle frame and a conical expanding digging cutterhead. The part at the rear of the expanding cutter head is connected with a rear support shoe mechanism and a rear matching. Preferably, the hole guide shoe is slidably arranged on the mounting saddle, and is connected with the mounting saddle through a front pulling cylinder. The present invention aims at expanding and excavating the pilot tunnel from top to bottom, and adopts a conical expanding excavation cutter head to excavate the rock formations around the pilot tunnel layer by layer, thereby improving the efficiency of cutting and expanding excavation. The drilling and blasting excavation method improves the quality of the hole and reduces the disturbance to the surrounding rock, reducing potential safety hazards.

Description

technical field [0001] The invention relates to the technical field of inclined shaft construction, in particular to a pilot hole reaming 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 of the hole is poor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/02E21D9/08
CPCE21D9/02E21D9/08E21D9/065
Inventor 宁向可于庆增张喜冬秦庆华张啸
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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