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Blasting construction method based on certain angle formed between boreholes and joints

A construction method and angle-fixed technology, applied in blasting and other directions, can solve problems such as labor-intensive, underutilized explosives, time-consuming, etc., and achieve the effect of a wide range of crushing

Inactive Publication Date: 2014-05-14
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, in order to solve this problem, it is necessary to use an excavator to install iron rods to strike the rock for secondary crushing, which is not only time-consuming, but also labor-intensive, and the explosives have not been fully utilized.

Method used

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  • Blasting construction method based on certain angle formed between boreholes and joints
  • Blasting construction method based on certain angle formed between boreholes and joints
  • Blasting construction method based on certain angle formed between boreholes and joints

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Effect test

Embodiment 1

[0028] The blasting construction method in this embodiment, in which the drilling and the joints form a certain angle, is mainly applicable to the situation where the general rock occurrence of the whole mountain is not much different in the open-air step blasting site. If it is necessary to level the whole mountain, it is best It is to excavate along the inclination of the rock formation, so that the best excavation steps can be obtained, and it is the excavation direction with the best blasting effect. During construction, the following steps are included:

[0029] (1) Determine the mountain to be blasted, estimate the amount of rocks in the entire mountain and the height after blasting.

[0030] (2) Select several well-exposed rock formations in the entire mountain, and use a geological compass to measure the occurrence of the rock formations at these points—strike, dip and inclination X. Use the several groups of occurrences measured to make statistics to estimate the gen...

Embodiment 2

[0039] like image 3 As shown, the operation steps of this embodiment are basically the same as those of Embodiment 1, the difference being that the inclination angle of the mountain rock formation 3 to be blasted is 0°, and the angle between the drilling direction and the horizontal plane is 45°+φ / 2. After the hole is drilled, the charge 2 is put into it, and the plug 1 is installed at the hole, and the designed rock formation fragment 4 can be obtained after blasting.

[0040] Since the angle of the drilling hole is not perpendicular to the horizontal plane, the amount of charge can be better controlled. For example, for emulsion explosives, the tubes will not be skewed after being loaded into the hole, and they are all connected end to end and lie obliquely in the drilling hole.

[0041] It has been proved by engineering practice that the blasting construction method of the present invention can not only make full use of explosives, but also can obtain smaller rock blocks, ...

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Abstract

The invention discloses a blasting construction method based on certain angle formed between boreholes and joints. The blasting construction method mainly includes measuring occurrence of trend, inclination and dip angle X of to-be-blasted rock formation to acquire the internal friction angle phi, arranging drilling positions along the trend and the inclination crisscross, drilling holes by a drill with a drill pipe forming the angle of 45-degree +phi / 2+X with the horizontal plane, and performing charging, networking detonation and slag removal and the like. The blasting construction method can utilize the detonation energy of explosives to the utmost extent and prevents secondary breakage of rocks and large rock blocks from obstructing construction machines.

Description

technical field [0001] The invention relates to a blasting construction method, in particular to a blasting construction method in which drilling and joints form a certain angle. Background technique [0002] In the open-air blasting construction site, such as when road construction is blocked by a mountain, not only the mountain needs to be blasted, but also the gravel formed after the blasting needs to be reused. Since the purpose of the crushed stone is to fill the roadbed, its volume must not exceed too big. However, in most blasting constructions, in order to save costs, the distance between the blasting holes is generally larger than the design value, and the amount of charge in each hole is also controlled to be low, and all the holes are vertically downward, and the effect after blasting is often not good. ideal. Therefore, there are often rock debris that cannot be pushed by bulldozers, or large rock blocks dug by excavators. Generally, in order to solve this pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D3/04F42D1/00
Inventor 刘军黄超王冰玲
Owner HOHAI UNIV
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