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Fold rock burst control method based on ground fracturing and liquid explosive blasting

A technology of ground pressure shock and liquid explosives, which is applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc. It can solve the problem of high labor intensity of workers, difficulty in covering multiple working faces or one mining area, and affecting the normal working face. Production and other problems, to achieve the effect of low labor intensity, large control range, and reducing the probability of rock burst

Active Publication Date: 2021-12-21
CHONGQING UNIV
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AI Technical Summary

Problems solved by technology

Although the two methods of deep hole blasting and reinforced support can reduce the rockburst in the fold structure area to a certain extent, the control range is generally limited to a single working face, and it is difficult to cover multiple working faces or a mining area. At the same time, the labor intensity of workers is high. Affect the normal production of the working face

Method used

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  • Fold rock burst control method based on ground fracturing and liquid explosive blasting
  • Fold rock burst control method based on ground fracturing and liquid explosive blasting
  • Fold rock burst control method based on ground fracturing and liquid explosive blasting

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Embodiment

[0029] refer to Figure 1-3 Shown is a fold-type rockburst control method based on ground fracturing and liquid explosive blasting, using emulsion explosive 9 as the fracturing hydraulic pressure to fracture the bottom layer rockburst potentially dangerous area 3 in the folded structure area 1 and the second layer shock In the potentially dangerous area 4 of ground pressure, secondly detonate the emulsion explosive 9 in the crack 10 and the vertical well 6, and form a broken pressure relief zone in the rock burst surrounding rock area to control the rock burst. The specific operation process is as follows:

[0030] Taking a mining area of ​​Jinneng Holding Group as an example, there is a fold structure area 1 in this mining area, forming a structural stress concentration area, which may induce rock burst disasters during the mining process. The specific geological conditions of this mining area are as follows: the thickness of the coal seam is 4.0 m, the uniaxial compressive s...

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PUM

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Abstract

The invention discloses a fold rock burst control method based on ground fracturing and liquid explosive blasting. An emulsion explosive is used as a rock burst dangerous position of a fracturing fluid fracturing fold tectonic area; a crack and the emulsion explosive in a vertical well are detonated, a crushing pressure relief zone is formed in the rock burst surrounding rock area to control the rock burst, the tectonic stress of the fold tectonic area can be effectively reduced, the probability of rock burst occurrence is reduced, and meanwhile the method has the multiple advantages that the control range is large, and multiple working faces can be controlled at a time; the labor intensity of workers is low; and normal production is not influenced.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a fold-type rock burst control method based on ground fracturing and liquid explosive blasting. Background technique [0002] Fold structure is a structure formed by bending of rock or coal seam under the action of horizontal and vertical stress extrusion, torsion, etc. Fold structures are ubiquitous in many mining areas in my country, where large tectonic stress is distributed in the area, and coal-rock dynamic disasters are easily induced during the mining process of the working face, forming rock burst. [0003] Aiming at the problem of rockburst in the folded structure area, two methods of deep hole blasting and reinforced support are generally used for coordinated control. On the one hand, the elastic energy accumulated in the hard roof in the folded structure area is reduced by means of deep hole blasting, and the dynamic load disturbance caused by its breaking is redu...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21B43/26E21B43/263E21B43/11
CPCE21F7/00E21B43/26E21B43/263E21B43/11
Inventor 于斌邰阳刘宏杰杨敬轩匡铁军杨昆刘锦荣
Owner CHONGQING UNIV
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