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Terms relating to rockburst
Release time:
2019-08-27
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Source:
【ProceduresProvisions] Article 225 Coal seams that have experienced rock burst within the mine field, or coal seams (or their roof and floor rock formations) that have been identified as having a tendency to impact andEvaluationThe coal seam with shock risk is the rock burst coal seam. The mine with rock burst coal seam is rock burst mine.
Article 227 The mining of coal seams with a tendency to impact must be carried out with a risk of impact.Evaluation.
[Implementation Instructions] Rock burst (rock burst, rock burst) refers to the dynamic phenomenon of sudden severe damage due to the instantaneous release of elastic energy under the action of mining disturbance in the coal and rock mass around the roadway or working face, often accompanied by coal and rock mass throwing, loud noise, air waves and other phenomena.
The impact tendency refers to the natural attribute of whether the coal rock mass can produce impact ground pressure, which can be identified by laboratory test.
Impact risk refers to the possibility and degree of risk of impact ground pressure in coal and rock mass, which is affected by mine geological factors and mining conditions. Impact hazardEvaluationThe results were divided into four levels: no risk, weak risk, moderate risk and strong risk.
The definition of rock burst coal seam and rock burst mine is the basis and premise of rock burst prevention and control. If the mine has experienced rock burst, it is directly identified as a rock burst mine. The mine coal seam or its roof and floor strata have been tested and identified as having a propensity to impact, and have beenEvaluationThe coal seam with impact risk is determined as the rock burst coal seam.
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