A smooth blasting method for shaft excavation in high stress environment

A smooth blasting and high-stress technology, applied in blasting and other directions, can solve problems such as rock burst, underground personnel, equipment threat, rock burst, etc., and achieve the effects of reducing the impact of vibration, smoothing the empty surface, and preventing rock burst

Active Publication Date: 2021-09-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, blasting operations under high stress conditions are likely to cause rockburst (rock burst), which is undoubtedly a potential threat to underground personnel and equipment.

Method used

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  • A smooth blasting method for shaft excavation in high stress environment
  • A smooth blasting method for shaft excavation in high stress environment
  • A smooth blasting method for shaft excavation in high stress environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: as Figure 1~2 As shown, a smooth blasting method for shaft excavation in a high-stress environment, a central hole is opened at the center of the blast hole arrangement of the shaft rock in a high-stress environment, and several layers of ring-shaped main blast holes are opened on the periphery of the central hole. A ring-shaped smooth blasting hole is set on the periphery of the hole, uncoupled charging devices are installed in the main blast hole, and uncoupled charging devices are arranged at intervals in the smooth blasting hole; the uncoupled charging device in the main gun hole is controlled by a digital electronic detonator Accurately delay the detonation layer by layer from the inside to the outside and detonate the uncoupled charge device in the main blast hole of each layer at the same time, and the uncoupled charge device in the ring-shaped smooth blasting hole is controlled by digital electronic detonator to accurately delay the detonation hole...

Embodiment 2

[0034] Embodiment 2: as Figure 1~2 As shown, a smooth blasting method for shaft excavation in a high-stress environment, a central hole is opened at the center of the blast hole arrangement of the shaft rock in a high-stress environment, and several layers of ring-shaped main blast holes are opened on the periphery of the central hole. A ring-shaped smooth blasting hole is set on the periphery of the hole, uncoupled charging devices are installed in the main blast hole, and uncoupled charging devices are arranged at intervals in the smooth blasting hole; the uncoupled charging device in the main gun hole is controlled by a digital electronic detonator Accurately delay the detonation layer by layer from the inside to the outside and detonate the uncoupled charge device in the main blast hole of each layer at the same time, and the uncoupled charge device in the ring-shaped smooth blasting hole is controlled by digital electronic detonator to accurately delay the detonation hole...

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Abstract

The invention relates to a smooth blasting method for shaft excavation in a high-stress environment, and belongs to the technical field of mine development. In the present invention, a central hollow hole is set at the center position of the blasthole arrangement of the vertical shaft rock in a high-stress environment, and several layers of ring-shaped main blastholes are opened on the periphery of the central hollow hole, and ring-shaped smooth blast holes are arranged on the periphery of the main blasthole. The uncoupled charge device is installed inside, and the uncoupled charge device is set at intervals in the smooth blasting hole; the uncoupled charge device in the main gun hole is precisely delayed by digital electronic detonator control and detonates layer by layer from the inside to the outside, and each layer of the main gun The uncoupled charge devices in the hole are detonated at the same time, and the uncoupled charge devices in the ring-shaped smooth blasting hole are controlled by digital electronic detonators and detonated accurately and delayed hole by hole. The method of the invention can effectively carry out the blasting operation in a high-stress environment, and perform blasting and pressure relief work.

Description

technical field [0001] The invention relates to a smooth blasting method for shaft excavation in a high-stress environment, and belongs to the technical field of mine development. Background technique [0002] The depth of resource excavation and mining continues to increase. With the increase of mining depth, the problems faced gradually increase. For example, the high stress situation in the deep environment. With the increase of mining depth, the original rock stress and structural stress of the mine continue to strengthen , and grows linearly. Moreover, blasting operations under high-stress conditions are likely to cause rockburst (rock burst), which is undoubtedly a potential threat to underground personnel and equipment. Contents of the invention [0003] The present invention proposes a smooth surface blasting method for shaft excavation and blasting operations in such a high-stress environment. This method can effectively perform blasting and pressure relief work,...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor李祥龙侯猛张智宇杨阳王建国袁芝斌张其虎王子琛母永烨吴霄
OwnerKUNMING UNIV OF SCI & TECH