Mine water inrush

1) General omen.

(1) coal layer becomes wet, soft; help coal dripping occurs, the phenomenon of watering, and watering from small to large; sometimes appear to help iron rust coal traces.......

Cable identification device works

The cable identification instrument is a special instrument used to identify a specific cable from a bundle of cables in the installation, migration maintenance and troubleshooting of the power cable. In recognition of a particular cable, in addition to using the current dire.......

Causes and preventive measures of open pit mining accidents

The existence of any hidden dangers and the occurrence of accidents have their causes. The existence of hidden dangers in open pit mining accidents is mainly due to the indifferent legal concept of mine owners and employees, the lack of safety awareness, the lack.......