A blasting method for anti-rejection blasting of layered rock mass with a gentle dip angle

A gentle inclination, layered technology, applied in blasting and other directions, can solve problems such as hidden safety hazards, high block rate, over-under-digging, etc., and achieve the effects of improving safety, simple operation, and reducing mutual misalignment.
CN109737846BActive Publication Date: 2021-04-16WUHAN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV
Publication Date
2021-04-16

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Abstract

The invention discloses a blasting-proof blasting method for a layered rock mass with a gentle dip angle. Through geological forecasting and drilling process records, the distribution map of the rock formation in the blasting area is drawn; It is set on different rock layers, and a certain number of holes are arranged in the explosion area at the same time; a detonation point is set at the hole and the bottom of the hole, and the detonating cord runs through the entire charge. The upper and lower charge rolls are in close contact and in a straight line, and are detonated in a quincunx or V-shaped detonation manner. By improving the charge structure and optimizing the detonation mode, the present invention can solve the problem that the explosives fail to blast due to the mutual displacement of the rock layers during the blasting process of the layered rock mass with a slow dip angle, reduce the large block rate of the hard rock layer blasting, and avoid the lack of foundation surface. It not only improves the safety of the blasting network, but also facilitates rapid construction.
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Description

technical field

[0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and in particular relates to a blasting-proof blasting method for layered rock mass with a gentle dip angle, and is particularly suitable for blasting areas where there are layered rock masses with a gentle dip angle and part of the rock stratum with well-developed joint surfaces. Background technique

[0002] Drilling and blasting, as an economical and efficient means of rock mass excavation, has been widely used in various basic engineering constructions and mining of mineral resources. With the continuous development of drilling equipment and transportation tools, the advantages of blasting excavation, such as high production efficiency, low cost and easy use of comprehensive mechanized construction, have gradually attracted people's attention. However, in step blasting, blastholes often pass through rock formations with different lithologies, as well as fa...

Claims

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