Method for passing through top-coal caving region of roadway

Abstract

The invention discloses a method for passing through a top-coal caving region of a roadway and belongs to the field of mine supports. The method comprises the following steps: firstly determining the position of the top-coal caving region in the roadway, and digging a side channel at the upper part of the top-coal caving region except the head-on position of the roadway; respectively building a grout stopping wall at the inner side and the outer side of the caving edge of the top-coal caving region with the need of digging the side channel and filling consolidating materials; reinforcing supports at a top plate of the front parts of the grout stopping walls, drilling holes to the top part of the top-coal caving region, arranging filling pipes in the holes of the top-coal caving region, filing the consolidating materials into the filling pipes so as to enable gangue in the range of the top-coal caving region to be consolidated into a whole body; according to the shape of the section of the roadway, arranging a pipe shed to provide a support at the positions of the grout stopping walls at the outer side of the top-coal caving region; digging out the caving gangue consolidated in the section of the roadway at the pipe shed, and reinforcing the support at the section of the roadway; and till digging the side channel to pass through the roadway of the top-coal caving region. The method disclosed by the invention has the advantages of simple process, strong universality, easy mastering by workers, low cost, less underground auxiliary transportation volume and high safety and reliability.

Description

technical field [0001] The invention relates to a method for passing through a high-risk area of ​​a roadway, and is particularly suitable for a method for passing through a high-risk area of ​​a roadway in an underground coal mine roadway. Background technique [0002] During the excavation and support process of coal mine roadway, when encountering faults, bends and other geological structures or impacts of mining, the roadway roof caving often occurs, and the height and length of the caving are often different, and the caving gangue cannot If it is completely compacted, there may be a gap above the falling gangue. Usually, this kind of roadway cannot pass directly under the falling gangue. If it is not handled properly, it will not only affect the succession of mine excavation, but also the safety of construction will not be guaranteed. Special measures must be taken. In order to pass through the high-risk area safely, quickly and reliably, the support method must be adop...

AI Technical Summary

Problems solved by technology

[0002] During the excavation and support process of coal mine roadway, when encountering faults, bends and other geological structures or impacts of mining, the roadway roof caving often occurs, and the height and length of the caving are often different, and the caving gangue cannot If it is completely compacted, there may be a gap above the falling gangue. Usually, this kind of roadway cannot pass directly under the falling gangue. If it is not handled properly, it will not only affect the succession of mine excavation, but also the safety of construction will not be guaranteed. Special measures must be taken. Safe, fast and reliable passage through the high-risk area

[0003] The application number is: 201210008434.7, which discloses a fast and safe masonry support method for the over-elevation area. The waste I-beam or channel steel is used as the advanced temporary support during the excavation of the shaft, and the waste I-beam or channel steel is sequentially installed on the outside of the waste I-beam or channel steel. Fix the woven cloth and steel mesh or lead wire mesh on the waste I-beam or channel steel to form a temporary support for the roof. After the formwork is constructed, concrete is poured to form an arched concrete arch bearing structure. Complicated, labor-intensive, poor safety

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