We are puzzled by the pervious to water, the underground coal seam fire prevention, the question of deep zone mining and coal mining from incidence in Jixi.
透水、地下煤层防灭火、深部开采问题、大倾角采煤已经成为困扰鸡西煤炭开采的技术问题。
2
As the economic speed is creasing, the request of the mining quantity of the undergroundwater resources is creasing too.
并且随着经济速度的不断加快，对地下水资源开采量要求也不断提高。
3
Tthey formed complicated underground steam caves, which have good or bad influence on tourism, water supply, water power energy utilization, mining and underground construction.