Dip-oblique longwall mining along the strike of steeply inclined seams

摘要

It is very difficult to mine coal in thin and medium-thick steeply inclined seams under complicated geological conditions. Adoption of the dip-oblique mining method in Guangwang Coal Mining Administration improve safety and economics in this conditions. The paper describes the typical dip-oblique lognwall method along strike, the face layout and selection of main parameters, observations on strata control and other aspects of this type of operation.