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Cutting undermine structure and blasting control method

A cutting hole, the same technology, applied in the field of cutting structure and blasting control, can solve the problems of high cost and slow construction progress.

Pending Publication Date: 2019-11-15
中铁二局第二工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the non-blasting excavation reduces the impact on existing buildings (structures), the construction progress is slow and the cost is high

Method used

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  • Cutting undermine structure and blasting control method
  • Cutting undermine structure and blasting control method
  • Cutting undermine structure and blasting control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Please refer to Figure 1 to Figure 5 , the present embodiment provides a cutout structure 10, including a large cutout hole 100 and a small cutout hole 200 which are both arranged on the same vertical horizontal plane of the palm face. Wherein, the vertical horizontal plane refers to the plane in the horizontal direction among the vertical planes of the face.

[0041] The setting of the large cut hole 100 and the small cut hole 200 is specifically as follows: the large cut hole 100 includes a first cut hole 110 and a second cut hole 120, and the center line of the first cut hole 110 and the second cut hole The centerlines of the holes 120 are distributed along the two waistlines of the first isosceles trapezoid 130 , and are arranged at an included angle of 60°. Small cut hole 200 comprises the 3rd cut hole 210 and the 4th cut hole 220, the center line of the 3rd cut hole 210 and the center line of the 4th cut hole 220 form the two waists of the second isosceles trape...

Embodiment 2

[0061] Please refer to Figure 1 to Figure 5 , the present embodiment provides a blasting control method 30, which uses the cutout structure 10 in Embodiment 1, calculates the total amount of explosives in the cutout hole by empirical method, and divides the total amount of explosives into several equal parts, and respectively sets them in Dynamite placement point 300.

[0062] Each aliquot of explosive is configured to blast a substantially equal volume of rock. Multiple explosive placement points 300 in the same cut hole are separated by a distance L 0 Setting, the explosive built in the first cut hole 110 and the explosive built in the second cut hole 120 are symmetrical about the axis of symmetry 131, the explosive built in the third cut hole 210 and the explosive built in the fourth cut hole The explosive of the hole 220 is symmetrical about the axis of symmetry 131 . In this way, it can be realized that several equally divided explosives are arranged at intervals in e...

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Abstract

The invention relates to the field of tunnel engineering, and discloses a cutting undermine structure. The structure comprises a large cut hole and a small cut hole which are arranged on the same vertical horizontal plane of a tunnel surface, wherein the large cut hole comprises a first cut hole and a second cut hole, and a center line of the first cut hole and a center line of the second cut holeare distributed along two leg lines of a first isosceles trapezoid correspondingly and are arranged at an included angle of 60 degrees; and the small cut hole comprises a third cut hole and a fourthcut hole, and a center line of the third cut hole and a center line of the fourth cut hole are distributed along two leg lines of a second isosceles trapezoid correspondingly and are arranged at an included angle of 60 degrees. The length of the leg line of the first isosceles trapezoid is larger than the length of the leg line of the second isosceles trapezoid, a plurality of explosive placementpoints are arranged in each of the large cut hole and the small cut hole for ordered blasting, and the too large vibration caused by blasting of a cutting undermine area is avoided through mutual cooperation of the large cut hole and the small cut hole.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a cutting structure and a blasting control method. Background technique [0002] For tunnels constructed by drilling and blasting method, weak blasting is often used in order to avoid or reduce the damage or impact of blasting vibration on existing buildings (structures) when they are constructed close to buildings (structures). The investigation and analysis of the current situation shows that it is very difficult to control the blasting vibration velocity within 1cm / s when the distance from the excavation face is less than 15m, especially in hard rock formations. When the vibration control standards cannot be met, non-explosive excavation methods can only be used, such as hydraulic hammer, static crushing, CO2 blasting technology, single-arm roadheader and other measures. However, although the non-blasting method of excavation reduces the impact on existing buildings (structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04F42D5/045E21D9/00
CPCF42D1/00F42D3/04F42D5/045E21D9/006
Inventor 杨家松许士成刘斌邓明才杨龙伟杨贵均杨超段义文
Owner 中铁二局第二工程有限公司