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.
英
美
- 觀(guān)測結果表明：井筒上部壁后巖體在鉛垂方向上受張應力影響，而井筒底部壁后巖體應力的大小和性質(zhì)與工作面的布置方式、開(kāi)采順序以及井筒與工作面的相對位置有關(guān)。
