Surrounding rock stability control method for deep ultra-large section dense chamber group

A technology with surrounding rock stability and super-large cross-section, which is applied in underground chambers, earthwork drilling, wellbore lining, etc., can solve the problems of increasing major disasters and accidents, increasing broken rock mass, increasing water inflow, etc., and achieves perfect construction technology , avoid secondary support, reduce the effect of later maintenance

Pending Publication Date: 2021-02-09
中国平煤神马控股集团有限公司
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Problems solved by technology

The continuous deterioration of geological conditions, changes in the stress environment of the rock mass and the resulting variation in the mechanical properties of the rock mass, rock mass structure, strength, deformation and other characteristics have resulted in an increase in broken rock mass, inc

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  • Surrounding rock stability control method for deep ultra-large section dense chamber group
  • Surrounding rock stability control method for deep ultra-large section dense chamber group

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[0035] In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] One embodiment of the present invention is a method for controlling the stability of the surrounding rock of the deep ultra-large cross-section dense chamber group as follows: figure 1 shown. exist figure 1 , this example includes:

[0037] Step 100: analyze the geological conditions of the coal rock mass, and measure the physical and mechanical parameters of the coal rock mass;

[0038] Step 100 specificall...

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Abstract

The invention relates to a surrounding rock stability control method for a deep ultra-large section dense chamber group. The technical problem that existing deep ultra-large section chamber surrounding rock is unstable is solved. The method comprises the following steps that geological conditions of coal and rock masses are analyzed, and physical and mechanical parameters of the coal and rock masses are measured; support parameters are determined according to the chamber surrounding rock deformation rule and the chamber surrounding rock stability mechanism under the high stress condition; theposition and the size of an ultra-large section chamber are determined according to the analysis result and the surrounding rock physical and mechanical parameters; tunneling is performed in a drilling and blasting mode; according to the support parameters, a combined supporting mode of a metal net, anchor rods, anchor cables and sprayed concrete is adopted for supporting the arch-shaped ultra-large section of the chamber; and the coal seam is mined, and gangue generated in the post-mining area is used for backfilling into the goaf of the pre-mining area. According to the method, the construction process of the deep ultra-large section chamber is perfected, the supporting strength is improved, the deformation of the surrounding rock of the chamber is controlled to be stabilized within an allowable range for a long time, later maintenance of the chamber is reduced, secondary supporting is avoided, and meanwhile green mining is achieved.

Description

technical field [0001] The invention relates to the technical field of deep large-section surrounding rock control, in particular to a method for controlling the stability of surrounding rock stability of dense chamber groups with super-large deep sections. Background technique [0002] With the deep mining of coal resources, the ground stress increases rapidly, and a large number of chambers with difficult support appear. The continuous deterioration of geological conditions, changes in the stress environment of the rock mass and the resulting variation in the mechanical properties of the rock mass, rock mass structure, strength, deformation and other characteristics have resulted in an increase in broken rock mass, increased water inflow, and increased ground temperature. High, deteriorating operating environment, difficult maintenance of chambers, increased costs, and difficulty in ensuring safety, etc., have also led to an increase in major disasters and accidents in dee...

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Application Information

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IPC IPC(8): E21D11/15E21D11/10E21D20/00E21D21/00
CPCE21D11/152E21D11/10E21D20/00E21D21/0026
Inventor 张建国程伟邓五先代志旭李松陈晓龙王山磊王维薛千成
Owner 中国平煤神马控股集团有限公司
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