A method for the expansion and support of return airway in soft rock working face of coal mine

Abstract

The invention relates to a method for repairing and supporting an air return roadway in a soft rock working face of a coal mine. Firstly, a side loader is used to pull the bottom, and a roadway repair machine is used to carry out roof lifting and side expansion; For the net cable, use steel sheds for inclined miners, trough-type wooden piles and sided wooden piles to strengthen the support; for the U-shaped steel shed support section roadway, re-erect U-shaped steel sheds, trough-type wooden piles and sided wooden piles for reinforcement support. The present invention is mainly to solve the problem that during the mining process of the working face, under the influence of mine pressure and mining disturbance, the soft rock roadway will converge on the roof, floor and two sides, resulting in a significant reduction in the roadway section, affecting ventilation, pedestrians, material transportation, Coal transportation and other problems. Through the implementation of the present invention, it is also possible to effectively reduce the repair frequency of the roadway, reduce the labor intensity of workers, and increase the advancing speed of the working face, which is of great significance for improving the economic benefits of the mine.

Description

Technical field[0001]The invention belongs to the field of expansion and support of a return airway in a soft rock face of a coal mine, and relates to a method for expansion and support of a return airway in a soft rock face of a coal mine.Background technique[0002]With the continuous increase in the intensity and depth of coal mining in my country, the objective conditions for coal mining have become more complicated, especially in the central and eastern mining areas. Some coal mines have entered the stage of deep mining, and the return airway of the deep mining face is subject to in-situ stress and mining disturbances. Convergence and deformation are extremely easy to occur, which seriously affects the safe and efficient mining of the working face. At the same time, with the continuous improvement of my country's coal mechanization level, the development trend of mining equipment is large-size and high-power, and the average daily productivity of working faces has also been great...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for the expansion and support of return air lanes in soft rock working faces of coal mines, which is suitable for medium-thick and thick coal seams with relatively soft roof and floor lithology, poor surrounding rock conditions, and serious roadway convergence deformation The support of the return airway of the working face is used to overcome the problems of the roof sinking of the return airway of the existing soft rock working face, the bottom drum and the convergence of the two lanes. The present invention can better adapt to the characteristics of the soft rock return airway. It can effectively improve the expansion efficiency and improve the support effect

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