And the properties and amplitude of stress of rock mass in the back of shaft wall at the bottom are related with l ayout of working face, mining sequence, and distance of the working face to shaf t.

• 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。