采动影响下井筒壁后岩体空间附加应力变化规律

VARIATION REGULARITY OF ADDITIONAL STRESS TO ROCK MASS IN THE BACK OF SHAFT WALL UNDER MINING EFFECT

本文较为详细地介绍了某矿井筒应力观测情况。得出了井筒壁后岩体空间附加应力随工作面推进的变化规律。观测结果表明 :井筒上部壁后岩体在铅垂方向上受张应力影响 ,而井筒底部壁后岩体应力的大小和性质与工作面的布置方式、开采顺序以及井筒与工作面的相对位置有关。

By studying the distribution of shaft stress measured in a coal mine in detail, this paper deals with the variation regularity of 3-D additional stress of rockmass in the back of shaft wall with the advance of working face. The result indicates that the rock mass in the back of the upper part of shaft wall has undergone verticlal.And the properties and amplitude of stress of rock mass in the back of shaft wall at the bottom are related with layout of working face, mining sequence, and distance of the working face to shaft.