影响底部放矿的采矿法开采工艺有效发展的原因之一,是沿用的锥形巷道(漏斗、堑沟)与运搬巷道的连接处不够稳固。这些连接处(眉线)往往呈尖角形,从而导致应力集中和削弱其稳定性。此外,矿石沿会集到放矿口中心的轨迹在锥形放矿巷道内运动时,有可能造成某种程度的堵塞。增大了的应力集中,经常出现的堵塞,以及处理堵塞 One of the reasons for the effective development of the mining method that affects the bottom draining is that the conical tunnel (funnel, trenches) that is used and the place where the moving roadway is connected are not stable enough. These connections (eyebrows) tend to be sharp-pointed, resulting in stress concentration and weakening of their stability. In addition, there may be some level of blockage of the ore along the trajectories converging to the center of the discharge mouth as it moves within the conical discharge tunnel. Increased stress concentration, frequent blockages, and blockages