他指出，今年许多煤矿盛产区都宣布禁止开采。
He points out that many coal-rich areas this year have been declared off limits for mining.
南部过去曾有许多煤矿。但是其中许多已被关闭或者将要关闭。
There used to be a lot of coal mines in the south, but many of them have been closed, or are about to be closed.
冲击地压是许多煤矿生产和技术管理中的难题之一，又是导致煤与瓦斯突出恶性事故的源动力。
Impact earth pressure is one of difficult problems in the production and management in many coal mines and it is the source power resulting in the coal and gas burst.
应用推荐