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Coal Loading Operations-Blasting Coal Loading
Release time:
2022-12-27
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Coal Loading Operations-Blasting Coal Loading
blasting coal loading
The process of automatically loading coal into the scraper conveyor by using the energy of the blast hole blasting in the coal mining face.It's called blasting coal. Blasting coal loading improves the efficiency of coal loading, reduces the labor intensity of workers, and reduces the number of workers.Personal injury and death accidents.
Methods to improve the effect of blasting coal loading:
(1) The scraper conveyor must be pushed against the coal wall (the gap between the scraper conveyor and the coal wall cannot be greater than 300mm),And in the scraper conveyor goaf side installationCoal baffle. Blasting in time, blasting firstBreak the top eye, will fall most of the coal loadedInto the conveyor; Then hang the top beam, timelySupporting the roof; blasting the bottom hole again, throwing the coalThrow into the conveyor,If properly operated, the blasting coal loading rate can reachMore than 60%.
(2) The blasting method with shallower shot hole and less charge shall be adopted.
(3) Millisecond blasting with millisecond detonator.
If there is a single row of eyes, the detonator section numbers are 1, 2, 3,4, 5, or 1, 2, 3, 2, 3, 4, 3, 4, 5For double-row eyes, refer to Figure 5-2 for lightning installation.Tube. Do not use detonators at intervals between shot holes. BlastingAt the same time, the conveyor will be turned on to prevent too much coal from being crushed to death.Conveyors.In order to meet the requirements of blasting coal loading, the following coordination shall be made between hole punching and blasting:
(1) Add 1~2 cutting holes. Except for cutting holes with angles, all other holes are straight holes.
(2) When the mining height is small, two rows of gun eyes can be fired, the eye distance should be smaller, and the top eye charge should be less to reduceVibration of the roof by blasting.
(3) When hitting three rows of shot holes with large mining height, first put the waist eye, second put the top eye, and then put the bottom eye, because the bottom is put back.The upper blasting coal can be smoothly loaded into the conveyor. Blast hole arrangement for blasting coal loading can be based onTimely adjustment of specific conditions of working face
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