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Method for maintaining broken roof of negative coal pillar roadway by grouting reinforcement anchor rod suspension

A broken roof, grouting reinforcement technology, applied in the installation of anchor rods, tunnels, tunnel linings, etc., can solve problems such as deformation, broken roof, etc.

Active Publication Date: 2022-02-01
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0004]The present invention proposes a method of grouting and filling the broken roof to form a new direct roof, and then using high-traction bolts (cables) to suspend the roof, which can Effectively solve the problem of broken roof and artificial false roof bulging and deformation in the way of negative coal pillar roadway layout

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  • Method for maintaining broken roof of negative coal pillar roadway by grouting reinforcement anchor rod suspension
  • Method for maintaining broken roof of negative coal pillar roadway by grouting reinforcement anchor rod suspension
  • Method for maintaining broken roof of negative coal pillar roadway by grouting reinforcement anchor rod suspension

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Embodiment Construction

[0022] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0023] The invention provides a method for suspending and maintaining the broken roof of a negative coal pillar roadway by grouting and reinforcing anchor rods.

[0024] Such as figure 1 , figure 2 and image 3 As shown, the method includes the following steps:

[0025] S1: In the coal body 9, when the upper layered working face 4 is mined, after the roof caving directly above the layered roadway 1 is completed, the grouting reinforcement 10 process is implemented on the broken roof 8 that has collapsed, so that the layered roadway 1 breaking the top plate 8 into a complete body;

[0026] During the grouting process, grouting from the floor of the roadway on the upper layered working face will be done in several different places, mainly to ensure th...

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Abstract

The invention provides a method for maintaining a broken roof of a negative coal pillar roadway through grouting reinforcement anchor rod suspension, and belongs to the technical field of mining. The method comprises the following steps: firstly, during upper layer mining, after an immediate roof above a layered roadway finishes collapsing, grouting reinforcement is performed on a collapsed broken top plate, so that the broken top plate of the layered roadway becomes a whole; then, after mining of an upper layered working face is finished and grouting of the broken roof of the layered roadway is completed, the layered roadway is tunneled; in the layered roadway tunneling process, a high-traction-force anchor rod is adopted to suspend the whole top plate after grouting reinforcement, so that the top plate is suspended on a lateral hard top plate; after tunneling and anchoring of the layered roadway are completed, the working face of the layered roadway is stoped, and meanwhile, a broken top plate of a next layer is treated, or an upper layer roadway of a next working face is tunneled; and operations are repeated. The method can effectively solve the problems of roof crushing and artificial roof bulging and deformation in a negative coal pillar roadway arrangement mode.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a method for grouting and reinforcing anchor rods to suspend and maintain the broken roof of a negative coal pillar roadway. Background technique [0002] With the continuous increase of mining depth and intensity of mines in my country, the number of rock burst mines is gradually increasing, and the mine mining design based on the prevention and control of rock burst and the pressure relief methods of high-stress coal and rock mass present diversity and complexity. Among them, the roadway layout based on the negative coal pillar mining method has been approved and widely used in the thick coal seam layered mining in some mines. The special surrounding rock structure of the negative coal pillar roadway layout can solve the problems of high stress and high elastic energy accumulation of surrounding rock faced by the conventional roadway layout, and can eliminate the risk of rock bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/02E21D11/10E21D21/00
CPCE21D20/02E21D11/10E21D21/008
Inventor 张俊文董续凯宋治祥范文兵张杨安赛
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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