孤岛工作面冲击矿压危险及其控制

孤岛工作面及其周围巷道附近应力集中程度高，顶板运动剧烈，再加上地质构造的影响，当采深较大时，冲击危险程度很高，很容易引发冲击矿压。孤岛工作面冲击矿压危险检测预报及控制的技术是先分析冲击危险程度，确定冲击危脸指数，提出早期预报，然后，采用电磁辐射和钻屑法进行及时预报，最后，采用卸压爆破进行处理，并采用电磁辐射和钻屑法检验防治措施的效果。实践证明，这套技术安全、可靠、有效，能够保证在工作面进行高效生产。

HAZARDS OF ROCK BURST IN ISLAND COAL FACE AND ITS CONTROL

At the island coal face and its surrounding roadways,the stress concentration is at a very high level,the movement of the roof is also drastic,and the influence of the geological tectonics is significant. The more the mining depth is,the more the hazard degree of rock burst is. So the rock burst can be rendered easily near the island coal face,and monitoring,forecasting and controlling of the hazard are necessary. Firstly,the hazard extent of rock burst is analyzed to determine the index of the hazard of rock burst and to present the incipient forecast. Secondly,the rock burst can be forecasted instantaneously with electromagnetic emission (EME) and drillings. Finally,the island coal face should be handled with relieving shot,and the effect of control measures can be proved with EME and drillings. The practices prove that the presented technology can assure the safety and high production efficiency of the coal face.