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Construction method for converting dangerous rock treatment blasting material into dam filling-level burdening

A construction method and a technology of graded ingredients, which are applied in the field of converting blasting materials for dangerous rock treatment into dam filling-grade ingredients, can solve problems such as the inability to fully meet the construction requirements of reservoir dams and the small blasting slag, and increase the blockage of blast holes. The effect of length, increasing rock content, increasing rock particle size

Inactive Publication Date: 2020-11-24
CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the small particle size of the blasting slag after blasting, it cannot fully meet the construction needs of the reservoir dam. Therefore, it is necessary to optimize the design of the construction plan for dangerous rock treatment. By optimizing the blasting parameters, change the blasting material gradation, and increase the blasting mass The ratio of diameter and stone materials is reduced, so as to realize the purpose of directly applying blasting slag to dam construction

Method used

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  • Construction method for converting dangerous rock treatment blasting material into dam filling-level burdening
  • Construction method for converting dangerous rock treatment blasting material into dam filling-level burdening
  • Construction method for converting dangerous rock treatment blasting material into dam filling-level burdening

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Effect test

Embodiment 1

[0039] A construction method for converting hazardous rock treatment blasting materials into dam filling-level ingredients. The hazardous rock mass adopts a layered and partitioned blasting construction scheme, and pre-split blasting is carried out along the design contour surface of the excavation slope. After excavation layer by layer, blasting is carried out. The slag is transported back to the reclaiming platform 12 whose height is lower than the construction surface;

[0040] Include the following steps:

[0041] 1) The "deep hole step blasting method" is used for slope cutting construction, and the trailing edge parent rock is grading;

[0042] 2) Use the drilling rig 9 to drill the blast hole 8, and the drilling angle of the blast hole 8 is the same as the design slope angle;

[0043] 3) The blasting hole 8 is filled with explosives by means of spaced charge, and the single-hole single-ring blasting network is used for detonation to increase the clamping effect of rock...

Embodiment 2

[0050] like Figure 2-3 , on the basis of Example 1, the first section of construction area 4 is excavated from the dangerous rock mass 1 to the parent rock 2 to exceed the crack 3, and the excavation area includes the dangerous rock mass 1 and the parent rock 2;

[0051] The second-stage construction area 5 is excavated from the parent rock 2 in the direction of the side slope 7 to approach the side slope 7 and a protective layer 6 is reserved;

[0052] The protection layer 6 is excavated after the excavation of the first-stage construction area 4 and the second-stage construction area 5 is completed and the subsequent slope support construction is completed.

[0053] The horizontal excavation on the plane to the parent rock 2, that is, the construction part includes the dangerous rock mass 1 and part of the parent rock 2, can ensure that the dangerous rock mass 1 suddenly collapses to the parent rock 2 quickly.

[0054] The preferred solution is image 3 Among them, the fi...

Embodiment 3

[0057] like Figure 5-7 , On the basis of Example 1, in the step 3), the density coefficient of the blasthole 8 is greater than 1, the delay time difference between the blastholes in the front and rear rows is 110ms, and the delay time difference between blastholes in the same row is 50ms. Section detonator detonator.

[0058] When the density coefficient of the blast hole 8 is greater than 1, the particle size of the rock after blasting is larger, and the content of particles with a particle size greater than 5 mm in the blasting slag can be increased.

[0059] The preferred solution is Image 6 In the step 4), the charging section 801 and the packing section 802 are staggered in the blasting hole 8, and the detonating detonator 803 is penetrated in the charging section 801 and the packing section 802, and extends to the blasting hole 8 outside the orifice. The above-mentioned interval charging method is adopted to disperse the explosive energy and reduce the excessive cru...

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Abstract

The invention discloses a construction method for converting dangerous rock treatment blasting material into dam filling-level burdening. The construction method comprises the following steps that 1),slope cutting construction is carried out through a deep hole bench blasting method, and sloping is carried out on trailing edge mother rock; 2), blast hole drilling operation is performed by using adrilling machine, and the blast hole drilling angle is the same as the designed slope angle; 3), the blast holes are filled with explosives in an interval charging mode, and detonating is carried outby adopting a single-hole single-sound detonation network; and 4), after layered and sectioned excavation, the blasting slag materials are transferred through a dump truck, and the blasting slag materials are pushed to a material taking platform through a bulldozer. By the adoption of the method, the purpose of changing blasting gradation is achieved by optimizing blasting parameters, the proportion of large-diameter stones after blasting is increased, and when the large-diameter stones are blasted and pushed to the material taking platform, stone sources meeting other construction projects are formed by means of collision of the large-diameter stones, and the purpose of directly applying the blasting slag materials to dam construction can be achieved.

Description

technical field [0001] The invention relates to the field of hazardous rock blasting, in particular to a construction method for converting hazardous rock treatment blasting materials into dam filling-grade ingredients. Background technique [0002] When the landform type of the dangerous rock belt is high and steep cliff topography, there will be many dangerous rock bodies distributed on the cliff. Two-level dangerous rock belt, the total scale of possible collapse of the dangerous rock belt is 593.86×104m 3 , is a super-large dangerous rock belt. The spatial shape of the dangerous rock is semi-cylindrical, the upper part is wide and the lower part is narrow, the middle and upper part of the dangerous rock body slightly bulges to the outside of the cliff, and the maximum height of the dangerous rock is about 220m. The parent rock at the trailing edge is completely separated. The dangerous rock treatment body is located on a 90° vertical steep slope, with a vertical drop ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D1/08F42D3/04
CPCF42D1/00F42D1/08F42D3/04
Inventor 田秋芬涂胜熊建武金跃春皮定坤陈慧军李锐杨云风刘国强魏晓兰李丹吴凡王蓓蓓
Owner CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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