A super-large-diameter vertical shaft full-face tunneling machine and its construction method

Abstract

The invention discloses a super-large-diameter shaft full-section tunneling machine, which includes an excavation system, a shield body, a main drive system, a slag discharge system and a hoisting system; the excavation system includes a pilot tunneling device and a cutter head assembly; the cutter head assembly is equipped with Install the installation hole of the pilot tunneling device; the pilot tunneling device includes a pilot cutter head, a pilot shield body, a pilot drive, etc., and the pilot cutter head is connected with the pilot shield body through the pilot drive to realize the excavation of the pilot hole; the hoisting system includes hoisting components, hoisting components It includes a lifting device and a traction piece, the lifting device is connected with the shield body through the traction piece, and the traction piece is connected with the shield body in a cable-stayed manner. The invention adopts a special structure excavation system and slag discharge system, overcomes the problems of insufficient power and difficult slag discharge, and successfully realizes the full-section excavation and slag discharge of super-large-diameter shafts (diameter greater than or equal to 16m). The invention discloses a construction method for a full-section of a super-large-diameter shaft. Based on the above-mentioned roadheader, the full-section construction of a super-large-diameter shaft is efficiently realized.

Description

technical field [0001] The invention relates to the technical field of shaft construction, in particular to a super-large-diameter vertical shaft full-face boring machine and a construction method thereof. Background technique [0002] Shafts, also known as vertical shafts, are the main passages for underground mineral mining, ventilation of large and long tunnels and other underground projects, and have an irreplaceable position in underground projects. [0003] Existing shaft construction mainly includes drilling and blasting method and drilling method, specifically: [0004] The first type, drilling and blasting method: the main construction equipment of this method includes umbrella drill / small excavator, rock grabbing machine, hanging pump, derrick, hoisting winch, stabilizing car, bucket, etc., and its main processes include rock drilling, rock loading, lifting , Drainage, ventilation, formwork lining, etc. Shaft construction needs to be equipped with sealing plates, ...

AI Technical Summary

Problems solved by technology

[0011] 1. Power problem: For the construction of super-large-diameter shafts, based on the existing equipment structure, the driving power of the cutter head cannot meet the requirements, and the excavation construction cannot be carried out.

[0012] 2. The problem of slag discharge: For the construction of super-large-diameter shafts, the amount of slag discharge is large, and the existing bucket slag discharge method is slow in transporting slag, which cannot meet the demand for slag discharge; the existing mud pipeline slag discharge is controlled by the structure of the pipeline system Due to the limitation of slag, it has high requirements for slag, which cannot meet the needs of complex slag composition and large amount of slag discharge in super-large-diameter shafts.

[0013] 3. The stability of the excavation surface: the drilling and blasting method construction, the excavation surface is not a full section, and it is connected to the outside world, the excavation surface and the retaining wall cannot maintain pressure, the construction efficiency is low and the safety is poor; the drilling rig method construction requires more shafts with large sections Secondary expansion excavation, the excavation face and retaining wall cannot maintain pressure, the verticality control of the shaft is poor, and the comprehensive excavation efficiency of the bedrock stratum is low

[0014] 4. Hoisting problem: the existing equipment adopts the vertical hoisting method, and the load-bearing steel structure adopts the cantilever beam force mode. The weight of the load-bearing steel structure is heavy and the cost is high; Increase the construction strength of the ground lock foundation and further increase the difficulty of construction

Images