The mining with filling in goaf provides advantages for the rational mining of coal under buildings, railroads and water bodies.
采空区充填开采为“三下”煤炭的合理开采创造了条件。
The mining with filling in goaf provides advantages for the rational mining of coal under buildings, railroads and water bodies.
采空区充填开采为“三下”煤炭的合理开采创造了条件。
应用推荐