Crossed building block wall body supporting method for reinforcing forefield abandoned roadway

Abstract

The invention discloses a crossed building block wall body supporting method for reinforcing a forefield abandoned roadway. When a working face passes through the abandoned roadway, crossed building block wall bodies are built in the abandoned roadway for reinforcing; each crossed building block wall body consists of a main wall and an auxiliary wall; and the distances between adjacent crossed building block wall bodies are determined by calculating the supporting resistance on the crossed building block wall bodies. Abandoned roadway supporting resistance preventing basic burst broken rock blocks from being unstable is calculated according to the basic burst situation above the forefield, the supporting resistance on the crossed building block wall bodies is calculated by multiplying the resolved abandoned roadway supporting resistance with an extra coefficient 1.5, and thus the distances between adjacent crossed building block wall bodies can be obtained, namely, the abandoned roadway is supported by building crossed building block wall bodies with aerated concrete building blocks for building. the method has the advantages of simple process, convenience in construction, easiness in operating, direct cutting of the crossed building block wall bodies via a coal mining machine when the forefield passes through the abandoned roadway, convenience in recovering an ordinary crossed H steel ceiling support in the abandoned roadway and reduction in recovering work and unsafe factors.

Description

Technical field [0001] The invention relates to a wall supporting method, in particular to a cross-block wall supporting method suitable for reinforcing an advanced working face empty roadway in a coal mine. Background technique [0002] With the continuous increase of coal mining intensity and the gradual exhaustion of mine resources, further increasing the recovery rate of coal resources has become an important issue for high and stable production and sustainable production in mines. Among them, the mining and recovery of residual coal pillars is an important part of the recovery of coal resources. Due to the changes in coal seam storage conditions, the recovery of a large number of residual coal pillars left after formal mining and block layout has gradually become an urgent problem to be solved in the middle and late stages of large mines to maintain stable and high production. [0003] In the process of recovering residual coal pillars, the working face will often pass throug...

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Problems solved by technology

[0004] I-shaped steel sheds are generally used for support in the empty alley, which brings great inconvenience to the recovery work when the working face passes through the empty alley

[0005] To sum up, the existing technology is passive and dangerous for the safe passage of gobs in the working face, which greatly limits the recovery of such coal pillars, reduces the coal recovery rate, causes waste of resources, and does not meet the safety and efficiency requirements of mines. production principles

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