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Construction method for rapidly passing through high-outburst mine underground gob through advanced bag pre-grouting

A construction method and pre-grouting technology, applied in shaft lining, underground chamber, mining equipment, etc., can solve the problems of easy landslide in excavation, variable gas concentration, gas pressure, unfavorable construction, etc., to ensure construction safety Effect

Inactive Publication Date: 2019-03-19
PINGMEI SHENMA CONSTR ENG GROUP
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Problems solved by technology

[0003] Because the collapse situation of the goaf is not easy to determine, the strength of the collapsed surrounding rock is low, the excavation is easy to collapse, and the roof accident occurs. At the same time, the gas content in the goaf of the high outburst mine is high, and the gas concentration and gas pressure are variable, which is very harmful to the construction. unfavorable

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  • Construction method for rapidly passing through high-outburst mine underground gob through advanced bag pre-grouting
  • Construction method for rapidly passing through high-outburst mine underground gob through advanced bag pre-grouting
  • Construction method for rapidly passing through high-outburst mine underground gob through advanced bag pre-grouting

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Embodiment Construction

[0034] The specific embodiment of the present invention sees Figure 1-4 :

[0035] A construction method for advanced bag pre-grouting to quickly pass through the underground goaf of high outburst mines, such as Figure 1-4 , including the following steps:

[0036] (1) Determine the path, cross-sectional shape and size of the excavated roadway 1, and the cross-section of the excavated roadway 1 is arched;

[0037] (2) Manufacture of pipe shed pipe 5: use DN40 welded steel pipe as the grouting pipe 51, the diameter of said pipe shed pipe 5 jack is not less than 55 mm, the tail end of said grouting pipe 51 is processed into a tip closed, said The starting end of the grouting pipe 51 is connected with a pipe diameter less than the grouting pipe 52 of the grouting pipe 51. The grouting hole is arranged at the afterbody of the grouting pipe 51. Exhaust pipe 53, the head of the exhaust pipe 53 is provided with threads and connected to the valve, the tail of the exhaust pipe 53 i...

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Abstract

The invention relates to a construction method for rapidly passing through a high-outburst mine underground gob through advanced bag pre-grouting. Pressurized by a grouting pump, cement grout is filled into bags via a grouting pipe to form cylindrical cement columns around the contour of roadway extraction to support and reinforce the roof and the surrounding rocks of a roadway and further to forma layer of waterproof and stable bearing case on the surrounding rocks of the pre-excavated roadway; meanwhile, lapped sections can serve as advanced anchor bolts to achieve the aim of prolonging theself-stabilization time of the rocks, improving the self-stabilization capacity of the surrounding rocks of an excavated surface and limiting stratum loosened deformation.

Description

technical field [0001] The invention relates to the technical field of coal mine roadway excavation, in particular to a construction method for rapidly passing through the underground goaf of a high outburst mine by pre-grouting an advanced bag. Background technique [0002] Before the mining of coal resources, it is necessary to design a development preparation roadway serving the entire mining area. During the construction process of the development preparation roadway at the next mining level, it is often encountered that the goaf of the previous mining level will be crossed. [0003] Because the collapse situation of the goaf is not easy to determine, the strength of the collapsed surrounding rock is low, the excavation is easy to collapse, and the roof accident occurs. At the same time, the gas content in the goaf of the high outburst mine is high, and the gas concentration and gas pressure are variable, which is very harmful to the construction. unfavorable. Contents...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/38E21D15/02E21D21/00E21D11/00
CPCE21D11/003E21D11/10E21D11/38E21D15/005E21D15/02E21D21/0026
Inventor 黄东超吴铭郝万海武江海张红涛孙鹏翔王冲杨红波张延年高飞高志兴张文山罗飞宇李文超李洋常涛李书豪
Owner PINGMEI SHENMA CONSTR ENG GROUP
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