In the mine drainage system many drainage pumps must work correspondly. 摘要在煤礦井下的排水系統中,需要多台排水泵協調地工作。
The research on probing into water bearing structure and watery of fore and lateral survey under coal mine is made by TEM. 利用瞬變電磁法在煤礦井下巷道開展了超前和側向探測含水構造及富水性的試驗研究。