Large-diameter deep hole blasting method suitable for coal mine collapse column passing

A technology of deep hole blasting and collapsing column, applied in blasting and other directions, can solve the problems of many blasting cycles, material consumption, slow advancing speed, etc., to reduce production costs, prevent potential safety hazards, and increase rock cracks.

Pending Publication Date: 2022-04-05
山西焦煤集团化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the mining face encounters a relatively hard rock layer and needs to be forced to advance, due to the great changes in the mechanical parameters such as the strength and hardness of the medium, the material consumption such as picks will be very serious when the fully mechanized mining machine is cutting, and the equipment damage rate is high. Propel speed is also very slow
[0003] At this stage, the small-diameter deep hole blasting method and shallow hole blasting method are mainly used. The loosening effect of small-diameter deep hole blasting is slightly worse, and the loosening medium range of shallow hole blasting is small, the number of blasting cycles is large, and the auxiliary operation time is long. The work efficiency is low, the production cost has increased significantly, and the safety risk caused by the number of blasting has also increased significantly

Method used

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  • Large-diameter deep hole blasting method suitable for coal mine collapse column passing
  • Large-diameter deep hole blasting method suitable for coal mine collapse column passing

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Effect test

Embodiment 1

[0024] see Figure 1-2 , the present invention provides a technical solution: a large-diameter deep hole blasting method suitable for collapsing pillars in coal mines, the specific steps are as follows:

[0025] S1. Blasting hole construction: Drill multiple blasting holes along the radial direction of the subsidence column in geological exploration. The blasting holes are parallel to the fully mechanized mining face. At the center of the subsidence column, the actual perforation depth of the blasthole is designed according to the radial length of the subsidence column in geological exploration; the number of blastholes is 5, and the distance between the blastholes is 2m; the diameter of the blasthole is 94m, made of alloy steel The drilling rig for drill bit is used for blast hole construction;

[0026] S2. Plugging construction: fill the blast hole with plugging material and rubber airbag in sequence; the plugging material is high-viscosity rubber material, the filling thic...

Embodiment 2

[0030] refer to Figure 1-2 , the present invention provides a technical solution: a large-diameter deep hole blasting method suitable for collapsing pillars in coal mines, the specific steps are as follows:

[0031] S1. Blasting hole construction: Drill multiple blasting holes along the radial direction of the subsidence column in geological exploration. The blasting holes are parallel to the fully mechanized mining face. At the center of the subsidence column, the actual perforation depth of the blasthole is designed according to the radial length of the subsidence column in geological exploration; the number of blastholes is 5, and the distance between the blastholes is 3m; the diameter of the blasthole is 94m, made of alloy steel The drilling rig for drill bit is used for blast hole construction;

[0032] S2. Plugging construction: fill the blast hole with plugging material and rubber air bag in sequence; the plugging material is high-viscosity rubber material, the fillin...

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Abstract

The large-diameter deep hole blasting method comprises the following specific steps that S1, blast hole construction is conducted, specifically, a plurality of blast holes are drilled in the radial direction of a collapse column for geological exploration, the blast holes are parallel to a fully mechanized coal mining face, and the blast holes are formed in the center position, 1 m or above away from a top plate, of the collapse column according to the height of the top plate and the position of the collapse column; s2, blocking construction is conducted, specifically, the blast hole is filled with a blocking material and a rubber air bag in sequence for blocking; s3, blasting charging: charging the blastholes by adopting a continuous charging mode; and S4, detonation operation is conducted, specifically, detonation of the multiple blast holes is conducted in a series connection mode. The large-diameter cylinder explosive is used for increasing the loosening depth of single blasting, increasing rock fractures of the stope face and reducing equipment loss; series blasting is adopted, blasting times can be reduced, fully-mechanized mining efficiency is improved, and production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of coal mine construction, in particular to a large-diameter deep-hole blasting method suitable for collapsing columns in coal mines. Background technique [0002] When the mining face encounters a relatively hard rock layer and needs to be forced to advance, due to the great changes in the mechanical parameters such as the strength and hardness of the medium, the material consumption such as picks will be very serious when the fully mechanized mining machine is cutting, and the equipment damage rate is high. Propel speed is also very slow. [0003] At this stage, the small-diameter deep hole blasting method and shallow hole blasting method are mainly used. The loosening effect of small-diameter deep hole blasting is slightly worse, and the loosening medium range of shallow hole blasting is small, the number of blasting cycles is large, and the auxiliary operation time is long. The work efficiency is low, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D1/08F42D3/04
Inventor 杨忠原王晓雯韩浩弓辉
Owner 山西焦煤集团化工有限责任公司
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