A bolt-modified surrounding rock anti-shock rock pressure method for extra-thick coal seams
A technology of ultra-thick coal seam and rock burst, which is applied in the field of bolt modified surrounding rock anti-burst, can solve the problems of reduced overall strength of coal and rock mass, integrity and stability of coal and rock mass, and achieves improved stability. performance and impact resistance energy dissipation capacity, avoid pressure relief damage or softening damage, and weaken the effect of shock wave intensity
Active Publication Date: 2020-09-11
LIAONING TECHNICAL UNIVERSITY
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] The purpose of the present invention is to provide a rock bolt modified surrounding rock anti-shock rock pressure method for extra-thick coal seams, which can change the impact tendency of the deep surrounding rock outside the loosening circle through the full-range anchoring method of the deep surrounding rock of the roadway, and strengthen the deep part of the roadway The strength of the surrounding rock consumes the impact energy in advance, weakens the strength of the shock wave, and then protects the shallow surrounding rock and the basic support structure of the roadway. Among them, the extra-thick coal seam refers to the coal seam whose thickness is greater than 8m.
[0029] In this example, in a working face of a certain mine, the thickness of the coal seam is 12m, the roof of the coal seam is siltstone, the roof is sand shale, the occurr...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of mine safety and provides an anti-impact ground pressure method for the bolt-modified surrounding rock in an extra-thick coal seam. The method comprisessteps that S1, after tunneling is completed, basic support bolts, anchor cables, metal meshes and steel strips are used to perform shallow surrounding rock basic support of the roadway roof and two sides; S2, the stress increase area and the stress peak position of the roadway surrounding rock are determined; S3, according to laws of mine pressure in the mining process of the working face, the dangerous area of ground pressure in the mining process of the working face is delineated; and S4, in the dangerous area of ground pressure, the full-length anchored resistance-enhanced support bolts areused to perform deep surrounding rock modified resistance-enhanced support for the roadway roof and the two sides. The method is advantaged in that the method can change impact tendency of the deep surrounding rock, enhance the strength of the deep surrounding rock in the roadway, consume impact energy in advance, weaken the shock wave intensity, protect the shallow surrounding rock of the roadway and the basic support structure and effectively prevents the impact ground pressure.
Description
technical field [0001] The invention relates to the technical field of mine safety, in particular to an anti-shock ground pressure method for modifying surrounding rock with anchor rods for extra-thick coal seams. Background technique [0002] With the continuous development of mine mining and the continuous expansion of the scope of coal mining, rock burst dynamic disasters in mine roadways and stopes have become more frequent. Rockburst causes massive destruction of mine roadways and chambers, massive casualties, and equipment damage, which poses a huge threat to mine safety production. [0003] In recent years, the research work on the prevention and control of rock burst has been continuously advanced. The existing roadway and stope anti-rock burst methods mainly include: [0004] 1. Passive support of roadway surrounding rock: U-shaped steel or single pillars are used for passive support of roadway surrounding rock. This kind of method is easy to be crushed, fractured...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21D20/02E21D21/00E21D11/15
CPCE21D11/152E21D11/155E21D20/00E21D20/021E21D20/025E21D21/0026
Inventor 王爱文高乾书潘一山何峰代连朋李忠华
Owner LIAONING TECHNICAL UNIVERSITY