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随着开采深度的加大,巷道底臌问题更加突出。因此,要研究底臌现象并找出有效的防止办法。研究结果表明,各向同性(均质)岩体底板的强烈位移是由于巷道轮廓附近应力高度集中所致。因此防止底臌最有效的方法是对巷道轮廓附近岩石进行应力释放(钻孔、槽缝、松动放炮释放)。苏联卡尔岗钦斯克矿区,多采用巷道底板垂直缝卸压法。在1985～1986年间,用槽缝卸压有3000m。开掘槽缝使用截煤机《乌拉尔—33》开缝深度1.6～1.8m。这种方法设备单一,参数变更灵活.随时间推移,槽缝逐渐压缩闭合,直至消失。
With the increase of mining depth, the problem of roadway bottom is more prominent. Therefore, we must study the underlying phenomenon and find effective ways to prevent it. The results show that the strong displacement of isotropic (homogeneous) rock floor is due to the high concentration of stress in the vicinity of the roadway profile. Therefore, the most effective way to prevent the bottom 臌 is to stress relieve the rock near the roadway profile (borehole, slot, loose release). Soviet Calgary Qin Sikes mining area, the use of roadway vertical seam relief pressure relief method. Between 1985 and 1986, there was a relief of 3000 m with slotting. Digging slots use the cutter “Ural -33” slit depth of 1.6 ~ 1.8m. This method of single device, flexible parameter changes over time, the slit gradually closed until it disappeared.