Supporting method capable of preventing roof and wall falling accidents

Abstract

Provided is a supporting method capable of preventing roof and wall falling accidents. By means of the supporting method, joist steel, metal nets and a hydraulic support are adopted for supporting a broken roof plate of a working surface in an auxiliary mode. When an opening is cut in the working surface, metal nets with certain specifications are overlaid on a section of a cut opening on the whole working surface are fixedly connected onto the section of the cut opening, and certain pitches among the metal nets are connected through iron wires. Afterwards, the hydraulic support is installed in the cut opening, a top beam of the hydraulic support butts against a direct top, so that the connected metal nets can droop in front of the hydraulic support and butts against a coal mine wall through a face guard plate. The joist steel is horizontally bundled on the metal nets before the hydraulic support through iron wires. In coal mining, the face guard plate is drawn back, and the metal nets in front of the hydraulic support are bundled on a column through iron wires. When coal mining is not performed, the metal nets are put down, the face guard plate butts against the coal mine wall, the support moves frontward, the metal nets are connected with the joist steel and moves to cover on the roof plate relative to the support, then work for connecting the metal wires and bundling the joist steel can be performed uninterruptedly and repeatedly until actual mining on the working surface is finished.

Description

technical field [0001] The invention relates to a method for supporting an anti-cave roof, and is especially suitable for the roof support when the working face is easy to collapse and the roof is recovered. Background technique [0002] With the continuous increase of coal mining intensity, especially the rapid development of high-yield and high-efficiency technologies in recent years, most coal seams with good mining conditions have been nearly exhausted within a short service life. At this time, some coal seams with poor occurrence conditions and roof conditions Coal seams that are prone to roof collapse, such as "three soft" coal seams, "two soft and one hard" coal seams, etc., have been exploited. Due to the complex working face conditions of such coal seams, the roof is weak and broken, and the coal quality is soft. During the mining process of the face, due to the influence of factors such as the mining of the working face and the repeated support of the hydraulic sup...

AI Technical Summary

Problems solved by technology

[0002] With the continuous increase of coal mining intensity, especially the rapid development of high-yield and high-efficiency technologies in recent years, most coal seams with good mining conditions have been nearly exhausted within a short service life. At this time, some coal seams with poor occurrence conditions and roof conditions Coal seams that are prone to roof collapse, such as "three soft" coal seams, "two soft and one hard" coal seams, etc., have been exploited. Due to the complex working face conditions of such coal seams, the roof is weak and broken, and the coal quality is soft. During the mining process of the face, due to the influence of factors such as the mining of the working face and the repeated support of the hydraulic support, the stability of the surrounding rock of the working face is poor, the roof is broken, the roof of the roof is serious, and the position of the roof of the roof is uncertain and irregular. It seriously affects the routine mining of the working face and causes serious safety hazards

Nowadays, there is no effective way to deal with the roof fall of the sheet side. Most of them are supported by a single hydraulic support to prevent the occurrence of the roof fall. When the roof of the working surface is encountered, the passive auxiliary support measures are adopted, and the effect is not good. Good, and prone to roof fall accidents

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