Pilot tunnel reaming TBM for inclined shaft and construction method

A technology for inclined shafts and pilot holes, which is applied in earth-moving drilling, mining equipment, tunnels, etc., can solve problems such as low construction efficiency of inclined shafts, improve cutting and step-changing stability, reduce safety hazards, and improve construction safety. Effect

Active Publication Date: 2021-02-09
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • 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 TB...

Method used

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  • Pilot tunnel reaming TBM for inclined shaft and construction method
  • Pilot tunnel reaming TBM for inclined shaft and construction method
  • Pilot tunnel reaming TBM for inclined shaft and 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 tunnel reaming TBM for an inclined shaft and a construction method. The problem that in the prior art, the construction efficiency of the inclined shaft is low is solved. The pilot tunnel reaming TBM for the inclined shaft comprises an installed saddle frame and a conical expanding excavation cutterhead, the front end of the installed saddle frame penetrates throughthe conical expanding excavation cutterhead and is provided with a pilot tunnel supporting shoe, and the part, located behind the conical expanding excavation cutterhead, of the installed saddle frame is connected with a rear supporting shoe mechanism and a rear matching part. Preferably, the pilot tunnel supporting shoe is slidably arranged on the installed saddle frame and connected with the installed saddle frame through a front pulling oil cylinder. Aiming at pilot tunnel expanding excavation from top to bottom, the conical expanding excavation cutterhead is adopted to excavate rock strata around a pilot tunnel layer by layer, and the cutting and expanding excavation efficiency is improved; and pilot tunnel expanding excavation is carried out in a TBM mode, the drilling and blasting method excavation mode is eliminated, the hole forming quality is improved, disturbance to surrounding rock is reduced, and potential safety hazards are reduced.

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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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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