求翻译：下山巷道作为采区的重要行人、运输通道，其稳定性直接影响煤矿的生产和安全，近年在深部开采条件下，随着外部环境的变化，呈现出巷道底鼓难以治理的现象。是什么意思？

Down the roadway as an important mining area pedestrian, transport corridors, and its stability directly affect the production and safety of coal mines, in deep mining conditions in recent years, with the changes in the external environment, showing a phenomenon difficult to renovate the floor heave

Qixin mountain parklands as a pedestrian, the important transport corridor, directly impact the stability of the coal production and safety in recent years, the deep mining conditions, with changes in the external environment, there is a gallery floor drum harder to govern.

正在翻译，请等待...

Down the tunnel as an important pedestrian area, transport channels, its stability directly affect the production and safety of coal mines, under the condition of deep mining in recent years, with changes in the external environment, showing roadway floor drum is difficult to control.

Descends a mountain the important pedestrian who the tunnel achievement picks the area, transports the channel, its stable direct influence coal mine production and the security, recent years under the depth portion mining condition, along with the external environment change, presented the phenomen