Method for automatic tunneling for coal mine small section tunnel by use of pipe-jacking coal mine automatic tunneling equipment

Abstract

A method for automatic tunneling for a coal mine small section tunnel by the use of pipe-jacking coal mine automatic tunneling equipment utilizes pipe-jacking coal mine automatic tunneling equipment to conduct small section tunnel construction in a coal mine. A section can be formed for one time and high construction efficiency can be achieved. Tool pipes are arranged on the back side of a machine head; external diameter sizes of the tool pipes and the machine head are the same; with a socket-connection way, a front flange of a pipe behind is tightly applied to a back flange of a pipe front; a main jacking device is disposed in a work chamber; the pipes are pushed and jacked by the main jack device; when main jack oil cylinders forwardly extend in place, the main jack oil cylinders are collected; I-shaped steel and an electric hoist are arranged over the chamber; tool pipes placed in an auxiliary chamber can be hoisted to a main jack guide rail by the electric hoist; after pipelines are connected with cables, the equipment continues to jack forward until the tunnel construction is finished. The method is advantaged by fast tunneling speed, small labor intensity and work difficulty reduction; work danger can be reduced and labor intensity of workers can be reduced; and an important meaning is provided for cost reduction and effect improvement in the coal mine industry.

Description

technical field [0001] The invention relates to the field of tunneling methods for small-section roadways in coal mines, in particular to a method for autonomously driving small-section roadways in pipe-jacking coal mines. Background technique [0002] At present, there are two main methods of excavation for small-section roadways in coal mines: 1. artificial excavation, and 2. excavation with fully mechanized excavators. These two excavation methods have their own limitations. [0003] First, gun excavation is an excavation method in which the rock is broken down by drilling and blasting. Small-section roadway excavation technology is still dominated by manual blasting, which has strong applicability and requires less equipment in the early stage. However, due to the limitations of explosive performance, blasting technology, and construction methods, the construction progress has been within a certain limit. Especially for tunnels with small cross-sections and high rock ha...

AI Technical Summary

Problems solved by technology

Small-section roadway excavation technology is still dominated by manual blasting, which has strong applicability and requires less equipment in the early stage. However, due to the limitations of explosive performance, blasting technology, and construction methods, the construction progress has been within a certain limit. Especially for tunnels with small cross-section and high rock hardness, manual excavation is prone to problems such as low safety, slow drilling speed, low blasting efficiency, high labor intensity, and difficulty in gangue extraction.

[0004] Second, the fully mechanized excavator is also used in the tunneling construction of coal mine roadways, but the fully mechanized excavator needs to balance the cutting force on the working surface through its own weight, so the machine is heavy and bulky, and it is not convenient to go into the mine. Not suitable for excavation less than 10m 2 Especially when excavating rocky roadways with relatively hard rocks, the excavation efficiency of fully mechanized excavators is low, the picks are severely worn, and the economic benefits are low

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