Medium and deep hole blasting method

Abstract

The invention discloses a medium-deep hole blasting method which includes the steps: drilling holes; examining and measuring the holes before explosive is filled; filling the explosive; mounting a detonating and initiating device; igniting the detonating and initiating device. The medium-deep hole blasting method suits for applications of mechanical explosive filling and on-site explosive mixing and filling technology, so that the explosive and the hole wall of a blasting hole are best coupled, leakage and waste of the explosive caused by underground holes or cracks are prevented, potential safety hazards caused by springing blasting formed by the holes connected with the blasting hole are eliminated, manual operation risks are reduced, and the use rate of the explosive is increased.

Description

technical field

[0001] The invention relates to the field of engineering blasting, in particular to a medium and deep hole blasting method. Background technique

[0002] With the popularization of mechanized charging and on-site explosive mixing technology, breakthroughs have been made in the safety level and mechanization of blasting engineering. With the improvement of the world's technological level, it is an inevitable development trend to use mechanical automation equipment for blasting engineering.

[0003] The main process of medium and deep hole blasting is to deliver the explosives to the inside of the blasting hole, and then detonate it with a detonating device to complete the operation. However, the current explosive shapes are mainly divided into three types: powder, slurry and liquid. When the explosive is transported into the blast hole, there will be various holes and cracks under different engineering geological conditions. The holes and fissures in the roc...

Examples

Embodiment 1

[0042] A medium-deep hole blasting method, such as figure 1 shown, including the following steps:

[0043] S1. Drilling: Use drilling equipment to drill down the blasting hole, set the diameter of the blasting hole d = 50mm ~ 400mm, the depth of the blasting hole l = 5m ~ 30m, and the blasting hole is located on the straight line and the horizontal plane in the direction of its length Angle α=45°~90°;

[0044] S2. Inspection and measurement before charging: detect whether the diameter, depth, and inclination of the blasting hole meet the design requirements, observe, photograph and locate the holes and cracks inside the blasting hole, and determine the corresponding blasting disposal plan;

[0045] S3. Explosive filling: Aiming at the holes and fissures distributed in the blast hole, lay an explosive package skin at the bottom of the blast hole, and fill the explosive package skin with the preset amount of explosives from the bottom to the top, and seal the explosive package ...

Embodiment 2

[0057] The difference between this embodiment and Embodiment 1 is that the diameter of the blasting hole is 50mm, the angle α between the straight line and the horizontal plane of the blasting hole in its length direction is 45°, the depth of the blasting hole is 5m, and the blasting hole is 5m deep. The film thickness of the sheath was 0.03 mm.

Embodiment 3

[0059] The difference between this embodiment and Embodiment 1 is that the diameter of the blasting hole is 400mm, the angle α between the straight line and the horizontal plane of the blasting hole in its length direction is 60°, and the depth of the blasting hole is 20m. The film thickness of the sheath was 2 mm.

technical field

[0001] The invention relates to the field of engineering blasting, in particular to a medium and deep hole blasting method. Background technique

[0002] With the popularization of mechanized charging and on-site explosive mixing technology, breakthroughs have been made in the safety level and mechanization of blasting engineering. With the improvement of the world's technological level, it is an inevitable development trend to use mechanical automation equipment for blasting engineering.

[0003] The main process of medium and deep hole blasting is to deliver the explosives to the inside of the blasting hole, and then detonate it with a detonating device to complete the operation. However, the current explosive shapes are mainly divided into three types: powder, slurry and liquid. When the explosive is transported into the blast hole, there will be various holes and cracks under different engineering geological conditions. The holes and fissures in the roc...

Examples

Embodiment 1

[0042] A medium-deep hole blasting method, such as figure 1 shown, including the following steps:

[0043] S1. Drilling: Use drilling equipment to drill down the blasting hole, set the diameter of the blasting hole d = 50mm ~ 400mm, the depth of the blasting hole l = 5m ~ 30m, and the blasting hole is located on the straight line and the horizontal plane in the direction of its length Angle α=45°~90°;

[0044] S2. Inspection and measurement before charging: detect whether the diameter, depth, and inclination of the blasting hole meet the design requirements, observe, photograph and locate the holes and cracks inside the blasting hole, and determine the corresponding blasting disposal plan;

[0045] S3. Explosive filling: Aiming at the holes and fissures distributed in the blast hole, lay an explosive package skin at the bottom of the blast hole, and fill the explosive package skin with the preset amount of explosives from the bottom to the top, and seal the explosive package ...

Embodiment 2

[0057] The difference between this embodiment and Embodiment 1 is that the diameter of the blasting hole is 50mm, the angle α between the straight line and the horizontal plane of the blasting hole in its length direction is 45°, the depth of the blasting hole is 5m, and the blasting hole is 5m deep. The film thickness of the sheath was 0.03 mm.

Embodiment 3

[0059] The difference between this embodiment and Embodiment 1 is that the diameter of the blasting hole is 400mm, the angle α between the straight line and the horizontal plane of the blasting hole in its length direction is 60°, and the depth of the blasting hole is 20m. The film thickness of the sheath was 2 mm.

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