Support method for high stress roadway coal-rock mass

A technology for coal rock mass and high stress, which is applied to the support field of high stress roadway coal rock mass, can solve the problems of insufficient strength of chemical slurry, unsatisfactory support effect, loss of support function, etc. The effect of eliminating high stress and improving self-supporting capacity

Inactive Publication Date: 2012-06-13
TAIYUAN UNIV OF TECH
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Problems solved by technology

The rock mass strengthened by simple inorganic cement grout shows rigid characteristics, and it is easy to be deformed and collapsed after being disturbed by repeated stress and loses the supporting function; the rock mass reinforced by pu

Method used

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  • Support method for high stress roadway coal-rock mass

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Embodiment Construction

[0019] Implement the support method of a kind of high-stress roadway coal rock mass provided by the present invention, through the scientific and rational application of the anchoring and grouting support method, combined with the composition of the surrounding rock mass of the roadway, the surface surrounding rock is used to construct a strong and tough transition seal layer, The shallow surrounding rock is constructed as a rigid layer, and the deep surrounding rock is in-situ modified into a flexible layer, which changes the properties of the broken coal and rock mass under high stress conditions, strengthens the self-bearing capacity of the surrounding rock, and realizes high stress and The anchor-grouting support system for broken coal and rock mass ensures the stability of the surrounding rock of the high-stress roadway.

[0020] Because the surrounding rock of the roadway is highly stressed and easily broken, the ordinary grouting method is used for drilling. When the dri...

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Abstract

A support method for high stress roadway coal-rock mass includes constructing surface wall rocks into a tough transition seal layer after the roadway is excavated and formed, respectively intersecting and distributing a self-entrance type grouting long anchor rod and a short anchor rod into the roadway coal-rock mass, injecting rigid slurry materials and soft slurry materials in the wall rocks inlayering mode, constructing the rigid slurry-material-injected wall rock into a rigid support layer in situ, modifying the soft-slurry-injected wall rock into a soft decompression layer in situ, and forming a rigid and soft nesting transition layer at the mutual nesting position of the two layers. The support method for the high stress roadway coal-rock mass improves the capacity of deep rock mass of the roadway wall rocks for adapting to large deformation and self-bearing, improves a stress distribution state of the high stress roadway wall rocks, enables the high stress roadway to be formedat one step and supported at one step, ensures the stability of the roadway under the conditions of complex structures, high stress, large range loosening and crushing and large deformation.

Description

technical field [0001] The invention is related to the support method for the broken surrounding rock mass of the roadway, and further relates to a support method for the deformation and failure of the high-stress broken coal rock mass in the roadway. Background technique [0002] The mining depth of the mine continues to increase. When the mining depth is above 600 meters, the high stress field formed by the coupling of the self-gravity stress field, the residual structural stress field and the support stress field caused by excavation makes it difficult to control the stability of the roadway surrounding rock. High stress, large deformation and its broken characteristics make it more difficult to support the roadway surrounding rock. Many mining areas have adopted multiple renovations and multiple grouting to maintain production, and were even forced to abandon mine mining under high-stress conditions, which seriously affected the safe production of mines. [0003] At pre...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D20/02
Inventor 李彦斌杨永康康天合苏学贵李剑坤
Owner TAIYUAN UNIV OF TECH
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