Author introduces the structure and the working principle of the secondary dust removal device with negative pressure as well as the application to fully mechanized mining face in Shuoli colliery.

Basing on finite element method and visual display technology, this paper analyses the gas drainage problem of goaf in Dalong mine.

Winning the line also went Tashan mine mechanized mining companies face two teams on the ground to understand the company's safety, equipment operation, on-site management, staffing and so on.