Rock coal supporting method based on loose rock coal seam grouting reinforcement
A technology of grouting reinforcement and coal seam, which is applied in the direction of earthwork drilling, shaft equipment, shaft lining, etc. It can solve the problems of lack of protective measures in the roadway, difficulty in ensuring the stability of the roadway, and insufficient support strength, so as to achieve ideal supporting effect and low cost , Increase the effect of stable performance
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[0018] In the first embodiment of the present invention, a rock coal support method based on loose rock coal seam grouting, including the following steps:
[0019] A: After the roadway digging, the mutually symmetrical drilling is opened on both sides of the middle of the roadway, wherein the drilling depth is 6 cm;
[0020] B: The stainless steel wire mesh is evenly laid on the roof of the roadway, and 12 vertical and horizontal threaded steel anchors are reinforced, and two vertical welding brackets perpendicular to itself on the inner wall of the roadway, with the threaded steel anchor and horizontal direction. In 13 ° distribution, the spacing between adjacent two sets of bolts is 650 mm, and the spagnetic distance is 720 mm;
[0021] C: Prepare the grouting liquid, perform the first high pressure spray on all the exposed faces of the roadway rock coal, form the first layer of protective layer, prevent the soft rock from weathered, then laid the two-layer spacing of 10cm suppo...
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