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Deep hole crack control blasting method for grouting reinforced surrounding rock

A technology of controlling blasting and grouting reinforcement, applied in blasting and other directions, can solve the problems of how much the grouting strength is increased, no practical application, different grouting effects, etc., and achieve the effect of reducing the number and expanding the diffusion range

Inactive Publication Date: 2013-08-07
GUIZHOU XINLIAN BLAST ENG GRP
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] At present, domestic and foreign studies on the strength of rock mass reinforced by grouting have only obtained some qualitative results, but they have not been applied in practice; measure
[0003] The fissures of the rock mass are irregular fracture surfaces formed under natural conditions, and their irregular features strongly affect the seepage process of the grout, while the distribution and surface characteristics of the fissures are random, and the pores or fissures of the rock mass are the channels for the flow of the grout , due to the different rock mass structures, the ways and paths of grout flow are different, resulting in different grouting effects. At present, there is no deep hole crack control blasting method for effective grouting to strengthen the surrounding rock

Method used

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  • Deep hole crack control blasting method for grouting reinforced surrounding rock
  • Deep hole crack control blasting method for grouting reinforced surrounding rock

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example 1

[0016] Such as figure 1 , figure 2 As shown, in a rock mass slope project, the rock mass is dominated by limestone, among which, the rock solidity coefficient f=6-7, the rock layer inclination angle is about 75 degrees, and the water content is relatively large. There is water 2 meters below the surface layer. After the excavation, the rock formation of the slope is unstable, and the slope outside the slope is reserved, and a drilling rig is used to drill holes with a diameter of 70 mm, a depth of 6 meters, and a distance of 6 meters between adjacent holes. Put the charge tube 1 in the borehole, and load the explosive coil 3 in the charge tube 1. The charge tube 1 is formed by lap welding of two arc-shaped plates, and the uncoupling coefficient of the explosive coil 3 is 1.5, the line charge density is 1.1 kgm -1 , tie the detonating cord on the loaded explosive volume 3, and after the length of the explosives installed with the detonating cord reaches the requirements of t...

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Abstract

The invention discloses a deep hole crack control blasting method for a grouting reinforced surrounding rock. The deep hole crack control blasting method comprises the following steps: (1) drilling holes on a rock body needing grouting, wherein the diameter of the drilled holes is 50-120mm, the depth of the drilled holes is 6-9m, and the distance between two drilled holes is 3-9m; (2) placing explosive containing tubes in the drilled holes, and filling stick explosive into the explosive containing tubes, wherein each explosive containing tube is formed by welding two arc-shaped plates in an overlapping mode, the decoupling coefficient of the stick explosive is 1.5-2.5, and the density of linear explosive is 1.1-1.7kg / l; and (3) performing presplitting blasting on the explosive in the drilled holes after explosion, and then filling grouting materials into cracks of the drilled holes. A plurality of cracks can be formed in a stratum, blast holes can be reserved and cannot collapse, grouting dispersing range is expanded, accordingly effective grouting curtains can be formed, the effect of grouting and water plugging can be achieved, and the surrounding rock can be reinforced.

Description

technical field [0001] The invention relates to a deep hole crack control blasting method for grouting and reinforcing surrounding rock, and belongs to the field of geotechnical engineering and blasting. Background technique [0002] At present, domestic and foreign studies on the strength of rock mass reinforced by grouting have only obtained some qualitative results, but they have not been applied in practice; measure. [0003] The fissures of the rock mass are irregular fracture surfaces formed under natural conditions, and their irregular features strongly affect the seepage process of the grout, while the distribution and surface characteristics of the fissures are random, and the pores or fissures of the rock mass are the channels for the flow of the grout , Due to the different rock mass structures, the ways and paths of grout flow are different, resulting in different grouting effects. At present, there is no deep hole crack control blasting method for effectivel...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D3/04
Inventor 赵明生池恩安成旭魏兴谢春明明悦沈晓松
Owner GUIZHOU XINLIAN BLAST ENG GRP
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