Control Research on Advance Velocity and Microseismic Events

According to the microseismic events, the degree of strata behaviors and the monitoring results of drilling method in the stoping period of Jining No. 3 coal mine 163 under 05 working face, this paper points out that the changes of advance velocity can affect the releasing process of vibration energy around the face to some extent. The number of daily vibration is smaller and vibration energy is lower when the daily progress of propulsion in the working face is 4.8 to 5.6 m. This paper also tries to discover the interactions between the footage of stoping face and rockburst by analyzing their relationships, and studies on the relationships between the occurring of microseismic events and advance velocity, on the basis of preventing rockburst disasters, determines the reasonable advance velocity of face and proposes a standard to prevent rockburst, which treats footage of stoping as one of the standards. Thus it can give guidelines to the later production phase of working face in the same level and same mining district and provide guarantees to make sure the production safety of coal mine.