CN2315523Y

CN2315523Y - Controller for rock directional breaking blasting

Info

Publication number: CN2315523Y
Application number: CN 97201153
Authority: CN
Inventors: 杨永琦
Original assignee: Beijing Graduate School Of China University Of Mining And Technology
Current assignee: Beijing Graduate School Of China University Of Mining And Technology
Priority date: 1997-02-03
Filing date: 1997-02-03
Publication date: 1999-04-21
Anticipated expiration: 2007-02-03

Abstract

The utility model discloses a controller for rock directional breaking blasting. The outside of the cartridge of the controller for rock directional breaking blasting is sheathed with a plastic tube; the tube wall of the plastic tube is provided with a cutting joint or a V-shaped cutting groove in a longitudinal direction; the controller for rock directional breaking blasting can be arranged in a cannon hole by a positioning rod; the cutting joint aims at the core connecting surface of the cannon hole, and the error is smaller than 15 DEG; hole wall which is corresponding to the cutting joint can form a radial crack first when the controller for rock directional breaking blasting is used for blasking; the communicating of the cannon hole can be accelerated under the function of concentrated blasting gas energy; the utility model can form smooth wall surface, and the half eye mark rate of a soft rock can reach to more than 90 percents; the unevenness is less than 10 cm; the utility model can save material, reduce cost, and can enhance surrounding rock stability and grubbing speed.

Description

The borehole directional fracture blasting control device

The utility model relates to a kind of rock directional blasting control device; Be applicable in the industries such as coal, metallurgy, railway, water power, building materials and geology and particularly in the soft rock tunnelling, more show effect unique in stone head (tunnel), coal road, half coal rock tunnel, vertical and the slope excavating excavation work.

In China's stone head tunneling construction, the drill eye blasting method accounts for more than 90%, and drill eye blasting also in the highest flight abroad; The popularization of smooth Surface Blasting Technology is greatly improved the laneway molding quality, but still ubiquity periphery Forming Quality is poor so far, blasting efficiency is not high, half hole mark rate is low, and the out break phenomenon is more serious, especially in than incompetent bed or broken rock, irregularity degree is particularly outstanding, thereby causing wasting a large amount of cement, the roof timbering shakiness is seriously restricting the raising of driving speed.Once adopted improvement photoface exploision structural parameters to attempt to address the above problem for this reason, but because the restriction of photoface exploision self principle and parameter, be at random to the radial fissure that produces on the blasthole hole wall after the explosion, energy is concentrated along predetermined direction, can not strengthen the directional fracture blasting effect.

The purpose of this utility model is to design a kind of borehole directional fracture blasting control device of the plastic tube that is provided with joint-cutting at explosive cartridge outside suit for overcoming above-mentioned weak point, utilize the directional fracture blasting control device that explosive energy blast back is transformed, producing strong directed dissection aspect the heart face along the big gun hole, reduce the blast action of other direction of big gun hole, thereby it is low to have solved the tunnel-surrounding half hole mark rate up hill and dale, the problem that irregularity degree is excessive.

The utility model content, the powder stick outside suit of borehole directional fracture blasting control device plastic tube, vertically is provided with joint-cutting or " V " shape grooving along the plastic tube tube wall.

Plastic tube adopts the non-toxic plastic pipe, and also available metal pipe, glass tube, earthenware or wooden bamboo substitute pipe.

The utility model advantage, the utility model can make the tunnel-surrounding half hole mark rate bring up to more than 90% from existing about 50% in tunnel blasting, irregularity degree is controlled in 10 centimetres, it is poor to have solved all edge formings more up hill and dale, high material consumption, the shortcoming that driving speed is low, this also is the high target of present home and abroad.As with supporting scientific and technological achievement burn cut method, directed joint-cutting explosion optimization for program and process matching, in the realization, the deep hole directional fracture blasting, will improve the laneway molding quality, reduce cost and material consumption, improve driving speed greatly, improve the country rock unstability; Promoting this technology will make smooth Surface Blasting Technology bring up to a new stage.

Description of drawings:

Fig. 1 is the utility model sectional schematic diagram.

Fig. 2 is the utility model blast back blasthole hole wall stressing conditions schematic diagram.

Below in conjunction with the preferred embodiment of description of drawings the utility model, commercial explosive volume 4 is loaded on 1 li of the BY non-toxic plastic pipe that is provided with joint-cutting, this non-toxic plastic pipe is loaded on 3 li in big gun hole, and joint-cutting 2 is aimed at the big gun holes face that connects with the heart; Because the setting of joint-cutting, after the explosion, corresponding to the preferential small radial fissure that forms in the blasthole hole wall place of joint-cutting, then accelerating the crack under the effect of detonation gas 5 runs through, because the superposition of stress field between the expansion in crack and directed big gun hole, add the resistance of BY non-toxic plastic tube wall, suppressed the generation of radial fissure at random of other direction of big gun hole; Adopt light in modern age, electric integration test technology that principle and mechanism, stress field parameter distribution and the power conversion rule of the effect of the utility model explosion directional fracture are furtherd investigate, qualitative and confirmed the reliability of the utility model directional fracture blasting effect and the advance of technology quantitatively; For the stone head of different robustnesses, adopt its half hole mark rate of big gun hole of different cut shot method and different depth will be greater than 90%, irregularity degree will be less than 10 centimetres; Laneway molding is good, has saved cement, has reduced cost, has improved blast hole utilizing factor and has reduced the big gun hole number, has strengthened the stability of back.Dispose large, medium and small three kinds of specifications according to different blasthole diameter the utility model, can satisfy the needs of various engineerings.Use the utility model explosion in soft rock, half rate of its periphery brought up to about 95% by 40%, and irregularity degree is less than 10 centimetres, and stone fling distance is less than 14 meters; The utility model cooperates the burn cut method in a word, in the enforcement, deep hole blasting will make driving speed bring up to a new stage and obtain huge economic benefit.

Claims

1, a kind of borehole directional fracture blasting control device is characterized in that: powder stick outside is set with plastic tube, vertically is provided with joint-cutting or " V " shape grooving along the plastic tube tube wall.

2, borehole directional fracture blasting control device as claimed in claim 1 is characterized in that: plastic tube adopts the non-toxic plastic pipe, and also available metal pipe, glass tube, earthenware or wooden bamboo substitute pipe.