Abstract:
In order to determine the influence range and influencing factors of mining process on the disturbance of surrounding rock in coal mine roadway, the mainstream disturbance monitoring technologies in the current coal mine industry are summarized. Based on the monitoring principle and application effect, the typical problems existing in each method and the later improvement strategies are clarified. The spatial distribution characteristics of surrounding rock disturbance events were systematically analyzed based on micro-seismic monitoring technology, and the influence range of mining action on surrounding rock disturbance of coal mine roadway was preliminarily determined. Based on the stress redistribution of surrounding rock mining disturbance, geological characteristics of coal seam endowment and mining method, the influence of mining action on the disturbance range of surrounding rock is explored. It is found that: multi-parameter joint monitoring method combined with different types of monitoring technology can make up for the deficiency of single monitoring method; micro-seismic events are distributed in the range of -50 to 300 m along the strike of working face and -20 to 40 m above and below the roof and floor of coal seam along the horizon direction; the influence of stress redistribution and mining methods on surrounding rock disturbance is concentrated in the range of 200 m before working face, and the geological characteristics of coal seam endowment have a great influence on the range of 100 m before working face.