The development trend of scraper conveyor used at working face of underground coal mine overseas is to have greater driving power.
国外用于采煤工作面的刮板输送机的发展趋势是加大驱动功率。
The drainage in a coal mine under exploitation may give a strong impact on the underground water flow regime, causing negative influence on the development of the groundwater resources.
煤矿开采过程中的矿坑排水对地下水流场和地下水资源利用具有强烈影响。
The drainage in a coal mine under exploitation may give a strong impact on the underground water flow regime, causing negative influence on the development of the groundwater resources.
煤矿开采过程中的矿坑排水对地下水流场和地下水资源利用具有强烈影响。
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