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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

Pending Publication Date: 2021-03-30
BIN COUNTY WATER CURTAIN CAVE COAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the support strength of the existing rock coal support method is not high enough to ensure the stability of the entire roadway, and there is also a lack of corresponding protective measures outside the roadway, which is prone to collapse and other problems

Method used

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Embodiment Construction

[0018] In embodiment 1 of the present invention, a kind of rock coal supporting method based on loose rock coal seam grouting reinforcement comprises the following steps:

[0019] A: After the roadway is excavated, mutually symmetrical drill holes are opened on both sides of the middle of the roadway, and the depth of the drill holes is 6cm;

[0020] B: Lay stainless steel wire mesh evenly on the roof of the roadway, and use 12 criss-crossed threaded steel anchors to reinforce it, and weld two vertical reinforcement brackets vertically on the inner wall of the roadway, of which the threaded steel anchors are parallel to the horizontal direction It is distributed at 13°, the distance between two adjacent groups of bolts is 650mm, and the row distance is 720mm;

[0021] C: Prepare the grouting fluid, and carry out the first high-pressure grouting on all exposed surfaces of the rock coal in the roadway to form the first protective layer to prevent the soft rock from weathering, a...

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Abstract

The invention relates to the technical field of rock coal supporting, and discloses a rock coal supporting method based on loose rock coal seam grouting reinforcement. The rock coal supporting methodcomprises the following steps: A, after roadway tunneling, drilling holes which are symmetrical to each other are formed in two sides of the middle part of a roadway, and the depth of each drilling hole is 5-10 cm; and B, stainless steel wire meshes are evenly laid on a roadway roof, 10-20 criss-cross deformed steel bar anchor rods are adopted for reinforcement, and two reinforcing supports perpendicular to the reinforcing supports are longitudinally welded to the inner wall of the roadway. The roadway is supported in an internal and external reinforcing mode, the stability of the roadway is greatly improved, collapse and other phenomena of the roadway are prevented, the bottom of the roadway is backfilled with excavated broken stones and then poured with cement paste, the bottom of the roadway can also be reinforced, the whole roadway is more ideal in overall supporting effect, subsequent deep operation is easier, and the supporting method is low in cost and high in supporting strength and has a certain market popularization prospect.

Description

technical field [0001] The invention relates to the technical field of rock coal support, in particular to a rock coal support method based on grouting reinforcement of loose rock coal seams. Background technique [0002] The unconsolidated rock coal seam is difficult to mine because the coal seam and the roof and floor are soft and broken. At present, for the mining of the unconsolidated rock coal seam, in order to prevent the roof from appearing during the mining process, it is necessary to carry out grouting reinforcement on the pre-mining section. Before grouting reinforcement, rock coal needs to be supported. [0003] However, the support strength of the existing rock-coal support method is not high enough to ensure the stability of the entire roadway, and there is also a lack of corresponding protective measures outside the roadway, which is also prone to problems such as collapse. Therefore, those skilled in the art provide a rock coal support method based on loose r...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/10E21D11/15E21D11/20E21D11/28E21D20/00
CPCE21D11/00E21D11/152E21D20/00E21D11/28E21D11/10E21D11/107E21D11/20E21D20/003
Inventor 李乃录李伟张恒宋凯冯超辉白东东
Owner BIN COUNTY WATER CURTAIN CAVE COAL
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