Deep-hole groove-broaching top-breaking gangue-returning-free charging structure and operation method thereof

A technology of deep hole pulling and top breaking, applied in blasting and other directions, can solve the problems of blasting work, crushing the barrel, blocking the blast hole, etc., and achieves the effect of effectively reducing the amount of explosives and reducing the phenomenon of backlash.

Pending Publication Date: 2022-03-18
ANHUI TONGGUAN (LUJIANG) MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the whole process, the operators were all worried and careful, because the forklift may fall into the empty space if they don’t pay attention, which is very unfavorable to safe production; The gun barrel, blocked the blast holes, so that a large number of waste holes were generated, which also brought great troubles to the follow-up blasting work

Method used

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  • Deep-hole groove-broaching top-breaking gangue-returning-free charging structure and operation method thereof
  • Deep-hole groove-broaching top-breaking gangue-returning-free charging structure and operation method thereof
  • Deep-hole groove-broaching top-breaking gangue-returning-free charging structure and operation method thereof

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Embodiment 1

[0024] see Figure 1-4 : a kind of deep-hole slotting of the present embodiment breaks the roof and avoids returning gangue charge structure, including some blastholes distributed in the groove area of ​​the roof breaking area, and some of the blastholes are distributed in circles from the inside to the outside, and on each circle layer The blastholes are evenly distributed, the blastholes on the outermost ring layer are equipped with corresponding blasting components, and the blastholes on the inner ring layer are equipped with corresponding blasting components or blanks, and the blastholes are empty. Used as free surface and air outlet.

[0025] The blastholes in this embodiment are distributed in several circles. By leaving several blastholes as free surfaces and air outlets, it can effectively reduce the backflush phenomenon caused by excessive concentration of explosives, and avoid the blasting work carried out later after the blasting zone of the front hole is damaged. ...

Embodiment 2

[0041] This embodiment also discloses an operation method for breaking the roof of the deep-hole pull groove and avoiding the return of the gangue charge structure. The order is: the bottom layer 0ms millisecond delay detonator 1 stage two shots in the first circle, the second floor 75ms millisecond delay detonator 4 stage two shots, the third circle 150 / 200ms millisecond delay detonator 6 / 7 stage two shots, the second The middle layer of the 310ms millisecond delay detonator in the first circle has two shots at the 9th stage, the second lap has the middle layer of the 380ms millisecond delay detonator and the 10th stage has two shots, the third lap has the middle layer of the 460 / 550ms millisecond delay detonator and the 11th / 12th stage has two shots, and the upper layer of the first circle The 650ms millisecond delay detonator has two shots at the 13th stage, the middle 760ms millisecond delay detonator has two shots at the 14th stage, and the third lap has the upper 880ms mi...

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Abstract

The invention provides a deep hole groove broaching top breaking gangue returning-free charging structure which comprises a plurality of blast holes distributed in a groove area of a top breaking area, the blast holes are distributed in a circle layer mode from inside to outside, the blast holes in each circle layer are evenly distributed, and corresponding blasting assemblies are arranged in the blast holes in the outermost circle layer. Corresponding blasting assemblies or empty devices are arranged in the blast holes in the inner ring layer, and the blast hole empty devices are used as free faces and air outlet holes. The invention further provides an operation method of the deep hole groove broaching top breaking gangue returning-free charging structure. According to the method, blasting is sequentially carried out from inside to outside and from bottom to top, the last section of blasting provides a compensation space for the next section of blasting, and the time interval between the sections is obtained through a theoretical computer and on-site actual application; rock breaking can be effectively achieved, and the conditions that sintering extrusion is dead and a front blasting belt damages a rear blasting hole are avoided, so that the problem of gangue back-flushing after groove pulling and top breaking is solved, and unnecessary safety risks are avoided.

Description

technical field [0001] The invention relates to the technical field of large-diameter deep-hole blasting in mining engineering, and in particular to a deep-hole slotted top-breaking structure and an operation method thereof. Background technique [0002] When mining in the stope, the VCR method is used to carry out deep hole slot blasting to form a well before large-scale mining can be carried out. The process of pulling the trough is bottom-up, and the blasting height is generally 5 meters at a time; when the height of the last trough area is 12 to 14 meters, the blasting is completed at one time to form a patio, which is called breaking the roof. The roof breaking work must be successful at one time, otherwise it will cause a suspended roof, which is very difficult to handle and seriously threatens safety. Therefore, the amount of medicine in the trough area will be very heavy when the roof is broken; The gangue piled up in the rock drilling chambers around the empty area...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/08F42D1/18F42D1/02F42D1/06F42D1/00F42D3/04
CPCF42D1/08F42D1/18F42D1/02F42D1/06F42D1/00F42D3/04
Inventor 王振乾党建东蒋锋童春陈资南赵锐于向阳
Owner ANHUI TONGGUAN (LUJIANG) MINING CO LTD
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