Hao, Xianjie AU - Tian, Chen AU - Wang, Anhu AU - Liu, Yingjie AU - Jia，Tinggui PY - 2020 DA - 2020/12/18 TI -上覆地层的迁移规律研究Gob-Side条目保留由屋顶切割和压力释放的浅埋煤层SP - 8821160六世- 2020 AB -坚硬顶板的力学模型建立了分析减压屋顶切割(RCPR)过程保留(蒙古包)和Gob-Side条目确定了RCPR期间巷道稳定性控制的关键阶段。在对RCPR自动巷道关键参数力学分析的基础上，采用FLAC3D软件进行数值模拟，研究了RCPR高度和角度对自动巷道力学参数的影响规律。分析不同条件下巷道围岩应力和顶板垂直位移的变化趋势，验证哈拉沟煤矿12201工作面最佳顶板切高为6 m，煤层切角为20°。通过现场双向聚能爆破试验，很好地实现了RCPR自动巷道的效果。哈拉沟煤矿在浅开采深度硬煤层顶板结构、恒阻大变形锚索、单液压支柱、龙骨钢11#、钢网加固的巷道围岩控制措施可提供有效的围岩支护。在主动支护的基础上，还可以采用注浆锚杆进行围岩控制。研究结果表明，通过提高顶板切割高度，可以减小巷道煤侧的应力和顶板的垂直位移，有利于巷道的稳定。 Increasing of the roof cutting angle will lead to the increasing of stress in the coal side of the roadway and the increasing of roof displacement with a maximum angle of 20°. Meanwhile, the peak of stress concentrating on both sides of the extreme angle is decreased. Thus, increasing the cutting roof angle at random can be unfavorable to the management of roadway roof. To develop RCPR GER, roadway surrounding rock requires greater support when the mine face passes through a cutting slot. After industrial trials, these measures are proved to be effective in controlling surrounding rock movement and developing GER. SN - 1070-9622 UR - https://doi.org/10.1155/2020/8821160 DO - 10.1155/2020/8821160 JF - Shock and Vibration PB - Hindawi KW - ER -