1) mine water
Discussion on the quality control of determination in mine water;
Applied technology of mine water treatment and utilization;
2) acid coal mine drainage
Migration of hazardous elements in acid coal mine drainage;
3) coalmine [英]['kəulmain] [美]['kolmaɪn]
Emergency measures in coalmine during earthquake;
4) Underground Drainage in Coal Mine
5) wasted water in coal mine and coal washery
6) coal mine underground
Study on scheme of IF mobile communication in coal mine underground;
The status of mobile communication in coal mine underground is introduced, the difficult technical problems including laneway infection for wireless transmission and weak signal reception and noise interference are analyzed, and ways to solve these problems are proposed.
To solve the problem of frequent over-grade trip of fast short-circuit protection in high voltage power supply system of coal mine underground,a scheme of adaptive protection system based on independent substation was proposed.