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Measures for prevention and control of rock burst
Release time:
2022-11-08
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Measures for prevention and control of rock burst
- Measures for prevention and control of rock burst
1. For coal seams and rock strata evaluated as having the risk of rock burst, corresponding preventive measures must be taken in the design of mining area, tunneling and coal mining operation regulations.
2、coal seam water injectionIt is a more effective regional preventive measure against rockburst. Coal seam pre-injection time should be advanced mining work1-2 months. The water injection amount shall be based on the standard of increasing the water content of the coal seam by more than 2% and the coal conversion rate by more than 5%.
3, mining face mining, to choose a closer distance of no impact ground pressure or weak impact ground pressure coal seam as the protective layer first mining.
4,High pressure water injection of roof.When the roof of the coal seam is hard or harder rock, the roof height shall be adopted.
Pressure water injection softening precautions to eliminate or reduce the risk of impact ground pressure.
5、Roof loosening pre-splitting blasting.When the roof of the coal seam is a hard rock layer, it should be taken.Preventive measures for advance loosening and pre-splitting blasting for drilling holes and charging blasting to the roof.
6. All coal seams and rock formations evaluated as having impact risk must be taken preventive measures in advance by the mining area team. Implementation and implementation shall be carried out in accordance with the methods, processes, technical parameters and quality standards specified in the mining area design and tunneling and coal mining operation procedures. Any mining face that is not carried out in accordance with the regulations shall not be produced.
7, in particular, to strengthen the driving face and its vicinity within 50m range, coal mining face and its vicinity roadway within the scope of the impact of the support pressure, large geological structure zone near the prevention work. From the opening of the tunneling roadway to the design position, from the start of mining to the stop line position, all preventive measures should be fully implemented to avoid the occurrence of rock burst as much as possible.
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Key words:
Ground pressure, Coal seam, Impact, Preventive measures, Roof, Water injection, Tunneling, Rock strata, Mining
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