A method of blasting to increase seepage and its application

A technology of blasting holes and regular hexagons, which is applied in blasting and other directions, can solve problems such as large limitations, no effect, and limited seepage enhancement, and achieve the effects of reducing dosage, increasing permeability, and reducing labor

Active Publication Date: 2017-07-07
ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydraulic fracturing has great advantages in transforming coal rocks and increasing the permeability of coal rocks, but has great limitations. It has a good effect in the case of high hardness coal rocks, but for low hardness coal rocks, Increased penetration is limited or even non-existent

Method used

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  • A method of blasting to increase seepage and its application
  • A method of blasting to increase seepage and its application

Examples

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] A certain tunnel construction has a coal-piercing section, the coal-rock grade is grade IV, the joints are developed, and the rock mass is rich in gas. The gas emission rate is 0.5m3 / min after monitoring. In order to increase the construction speed and gas discharge speed, the method of blasting to increase seepage is used to increase the permeability of coal and rock, so that the gas can be discharged as soon as possible.

[0030] The construction steps are as follows:

[0031] 1) Determine the distribution position of the pilot holes in the blasting center.

[0032] Determine the center point of the tunnel profile through construction stakeout, and mark it as the center guide hole 1.

[0033] 2) Determine the distribution positions of pilot holes and blast holes.

[0034] Such as figure 1 As shown, take 2m as the side len...

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PUM

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Abstract

The invention discloses a method for increasing penetration by blasting, which comprises the following steps: (1) drilling a blast hole and a plurality of guide holes distributed around the blast hole; (2) filling explosives into the In the blast hole, wherein, the uncoupling coefficient is 1.5; (3) after blocking the blast hole, the explosives loaded are exploded in one salvo. Further discloses the application of the method for increasing seepage by blasting: it is applied to blasting fracturing of rocks with a hardness of IV; further, it is applied to gas discharge in tunnel construction projects, gas mining in coal mines, and water discharge from rock cracks in construction sites. The blasting seepage enhancement method of the present invention has obvious effect on increasing the penetration of low-permeability coal rocks, is simple and convenient in construction, saves resources, provides guarantee for construction safety, and has a wide range of applications, and can be applied to the extraction and treatment of gas and crack water.

Description

technical field [0001] The invention relates to the field of road and bridge construction engineering, in particular to a method for increasing seepage by blasting and the application of the method. Background technique [0002] Since the founding of our country, engineering blasting has been widely used in railways, transportation, water conservancy and hydropower, mining and other national economic construction departments, which has effectively promoted the development of national infrastructure. Mainly include open-pit blasting in mines, controlled blasting of road rockwork, large-scale blasting for directional damming of reservoirs, large-scale blasting for leveling and loosening construction sites, large-scale blasting for seaport throwing and reclamation, etc. The research on blasting technology as gas drainage control is still in the preliminary stage both at home and abroad. Strengthening the management of gas disasters is an important guarantee to prevent serious ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D3/04
Inventor 高世强肖向荣刘怀刚檀兴华杨立新刘伟杨幼江薛维龙彭卫东刘敦文葛纪平张铮江帆褚夫蛟谭力海
Owner ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD
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