Strength weakening of rock bursts in coal mines

The strength weakening controlling mechanism of rock bursts in coal mines was put forward. The strength of coal and rock mass can be weakened through deep hole relieving shot, so the ability of energy accumulation is reduced, and a large amount of elastic energy accumulated in coal and rock mass is released, which makes it sure that the elastic energy accumulated in coal and rock mass do not exceed the minimum energy induced rock burst. Simultaneously, electromagnetic emission (EME) is used to check out the effect of eliminating or reducing the danger of rock bursts. The validity of this kind of control technology is fully proofed by the engineering practice of 9202 high-danger working face in Sanhejian Coal Mine and 6303 danger working face in Jining No. 3 Coal Mine in China.