Long-distance jacking pipe tunneling method for coal mine roadways

Abstract

Disclosed is a long-distance jacking pipe tunneling method for coal mine roadways. A construction principle of a jacking pipe is adopted, long-distance jacking pipe tunneling is ensured, and internaldismantling and transportation can be achieved; the method comprises the following steps that finite element analysis and theoretical calculation methods are utilized, sampling is conducted on rock ofa stratum to be constructed, jacking force required for construction is calculated, a main jacking mechanism is designed, intermediate jacking stations are arranged, and single long-distance jackingpipe tunneling is achieved through the cooperation with a grouting friction-reducing technology; a modular design is adopted for internal equipment of a jacking pipe machine for mine, all cutting tools of the jacking pipe machine can be replaced inside, a transmission system is assembled and disassembled inside, after the jacking pipe machine conducts tunneling to a destination, the cutting toolsof the jacking pipe machine, the internal transmission system, an internal slag discharge pump, a hydraulic pumping station and oil cylinders of the intermediate jacking stations are detached from anexisting equipment shell, and the components are moved out of an inner pipe body and used for next engineering. The method has the advantage of solving the problems that existing long-distance jackingpipe tunneling methods for coal mine roadways are low in success rate and construction speed, and machine heads cannot be recycled.

Description

technical field [0001] The invention relates to the field of underground roadway excavation in the coal mine industry, in particular to a pipe jacking method for long-distance coal mine roadway. 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 hardness, artificial blasting ...

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. It is not suitable for excavating sections less than 10 square meters, especially when excavating rock 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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