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A kind of pilot hole reaming suspension cutting TBM for inclined shaft and its construction method

A construction method and technology for inclined shafts, applied in earthwork drilling, mining equipment, tunnels, etc., can solve the problems of low expansion and excavation efficiency of inclined shaft pilot tunnels, improve rock breaking efficiency and rock breaking specific energy, and increase excavation expansion Efficiency and the effect of reducing potential safety hazards

Active Publication Date: 2021-10-12
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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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

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  • A kind of pilot hole reaming suspension cutting TBM for inclined shaft and its construction method
  • A kind of pilot hole reaming suspension cutting TBM for inclined shaft and its construction method
  • A kind of pilot hole reaming suspension cutting TBM for inclined shaft and its construction method

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Embodiment 3

[0032] Embodiment 3: A construction method for a pilot hole reaming suspension cut TBM 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 in the pilot hole On the inner wall, when the TBM excavates through rock, the cutter head 102 for hanging cutting and expanding excavation rotates, and the hanging cutter on the cutter head 102 for cutting and expanding cuts the face of the tunnel face. Before TBM rock-breaking excavation, according to the tunnel diameter that needs to be expanded, adjust the position of cutter beam 201 on the spoke structure 202 through radial cylinder 203 to form an excavation profile that meets the requirements; The face of the tunnel is cut layer by layer to form a hanging cutting excavation; the dregs generated during the excavation process enter the pilot tunnel under the action of the hanging cutting hob 205 inclined on the hanging cutting expans...

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Abstract

The invention discloses a guide hole reaming suspension cutting TBM for inclined shafts and a construction method, which solves the problem of low expansion and excavation efficiency of inclined shaft guide holes in the prior art. The guide hole reaming suspension cutting TBM for inclined shafts of the present invention includes a central main beam and a suspension cutting expansion cutterhead. The part of the beam located at the rear of the hanging cutting and expanding cutter head is connected with a propulsion system, an active boot device and a safety shoe device, and the rear part of the safety shoe device is connected with a rear supporting device. The present invention aims at expanding and excavating the pilot tunnel from top to bottom, adopts the hanging cutting and expanding excavation cutter head to carry out the layer-by-layer hanging cutting and excavation of the rock formation around the pilot tunnel, improves the efficiency of cutting and expanding excavation, and the hanging cutting and expanding excavation cutter head changes the traditional The principle of rock breaking by TBM hob rolling utilizes the characteristics that the shear strength of rock is much smaller than the uniaxial compressive strength and rock breaking on the air surface, and adopts the suspension cutting hob to break rock to improve the rock breaking efficiency and rock breaking specific energy.

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 ...

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 贾连辉于庆增宁向可张啸刘建峰
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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