Axial non-coupling water spaced charging structure and smooth blasting method using same

A technology of interval charge and smooth surface blasting, which is applied in the field of blasting, can solve the problems of increased drilling cost, large damage to the pre-retained rock mass, and large blasting vibration, so as to reduce the generation of blasting dust, reduce the frequency of blasting vibration, The effect of reducing peak pressure

Inactive Publication Date: 2021-11-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the smooth blasting uses the simultaneous initiation of the smooth blasting holes, but the simultaneous initiation will cause large blasting vibrations and relatively large damage to the reserved rock mass, which is not conducive to the formation of a more stable slope wall.
Secondly, most of the smooth surface blasting technologies at the present stage are air-free coupling charges or charge coupling structures with the blasthole wall. Light blasting holes usually adopt the form of less charges and more holes, which will increase the drilling cost. At the same time, the amount of dust generated by blasting cannot be controlled, which has a great impact on the workers on the construction site and the environment.

Method used

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  • Axial non-coupling water spaced charging structure and smooth blasting method using same
  • Axial non-coupling water spaced charging structure and smooth blasting method using same
  • Axial non-coupling water spaced charging structure and smooth blasting method using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: The Figure 1-4 Shown uncoupled An axial space blasting water, comprising a tubular bag I12 of, drug volume 11, the tubular bag II9, stemming 8, detonating cord 7; blasthole substrate placed I12 of the tubular bag, the tubular I12 drug volume water bag 11 connected to the tip, drug volume 10 or 11 on both sides of the air gun is coupled with the hole wall, drug volume 11 using direct air radially decouple charge coupled or radial air charge, the distal end 11 drug volume II9 tubular bag is connected, the distal end of the tubular bag made from II9 stemming obturator 8, the entire blast hole 7 through the detonating cord 11 to the bottom of the drug volume.

[0027] The present invention employs an axial decoupling space blasting water provided by hole initiation of detonation in the network environment slope excavation required for accurate initiation by extension of the digital electronic control detonator, after explosion, the walls can slope semi-hole is prefer...

Embodiment 2

[0047] Example 2: Construction of the environment of the present embodiment and the construction standards different from Example 1.

[0048] In this embodiment with the standard required by the construction method of the center to both sides of the smooth blasting detonating sequentially consistent in Example 1, except that: the optical aperture 3 borehole diameter 45mm, pitch of 60cm; hole main borehole 4 having a diameter of 75mm, pitch of 70cm, row distance of 110cm. The presence of the excavation walls slope at an angle with the ground, belonging to the slope of the inclined wall. According to the construction requirements, slope excavation contour is in the form of an arc, so that the borehole is arranged as a light arc, arc 80 °, due to the high slope excavation, 4 hole main borehole depth reaches 11m, light 3 hole borehole depth is 10m. And a light main borehole 4 drilled boreholes 3 are angled, the main borehole 4 80 ° angle with the ground, the light popping 3 70 ° angle...

Embodiment 3

[0049] Example 3: adjusting the light borehole 3, charge structure of the main borehole 4, reducing the peak pressure during blasting of the hole wall.

[0050] Examples of this slope excavation smooth blasting method is substantially the same as in Example 1, except that: the optical aperture 3 borehole diameter 30mm, pitch of 30cm; 4 hole main borehole diameter of 50mm, pitch is 50cm, row spacing is 100cm. At the same time the main blasting initiation region 2 is, the same sequence as in Example 3 borehole light initiation, delay time between the holes is 10ms. Contour line slope in the presence of a certain curvature, was 15 °, the main borehole 4 is more perpendicular to the ground, the ground was 70 ° angle, contribute to the formation of the inclined wall slope, slope light formed borehole 3 Stablize. Decoupling charge structure in this example as Figure 4 , The drug is not coupled to the air volume in the presence of light borehole 3 in the radial direction, so that is more...

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Abstract

The invention relates to an axial non-coupling water spaced charging structure and a smooth blasting method using the same, and belongs to the technical field of blasting. The axial non-coupling water spaced charging structure comprises a tubular water bag I, a cartridge, a tubular water bag II, stemming and a detonating cord. The tubular water bag I is placed at the bottom of a blast hole, the front end of the tubular water bag I is connected with the cartridge, the front end of the cartridge is connected with the tubular water bag II, the front end of the tubular water bag II is filled with the stemming, and the whole blast hole penetrates to the bottom of the cartridge through the detonating cord. The smooth blasting method comprises the overall steps that main blasting holes are blasted firstly, and then smooth blasting holes are blasted; in a main blasting area, a row away from the outermost layer of the smooth blasting holes is blasted firstly, and then the remaining main blasting holes are blasted at the same time; and the smooth blasting holes are blasted from the center to the two sides in sequence. According to the axial non-coupling water spaced charging structure and the smooth blasting method using the same, blasting vibration can be greatly reduced, damage to reserved rock mass is small, meanwhile, vibration is small, damage is small, disturbance to the reserved rock mass is small, a formed slope is good in stability and effect, and meanwhile, blasting dust can be reduced.

Description

Technical field [0001] The present invention relates to a coupling without axial space blasting and water using a smooth blasting method thereof, belonging to the technical field of blasting. Background technique [0002] Blasting refers to the body part of the rock blasting, an effective free surface, then arranged in a borehole in the light of the contour line, as a protective layer "light burst layer" bombing other, forming a flat open digging surface. Blasting is a more advanced control blasting technology. It has been widely used in the construction of tunnels and develop, slope, hydropower stations and the like. Blasting is to control the scope and direction of the blast, the rock surface after blasting smooth, to prevent cracking of the rock face, in order to reduce over-excavation, digging and the amount owed engineering support and increase the stability of rock blasting vibration reduction effect, in order to achieve a technique for controlling the profile of the rock e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D1/10F42D3/04
CPCF42D1/00F42D1/10F42D3/04
Inventor 李祥龙方程王建国张智宇黄永辉陶子豪左庭李强
Owner KUNMING UNIV OF SCI & TECH
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