Trial Work of the Long Way in Thin Lignite Layer

[摘要] Trial excavation road head in the lignite seam was carried out by the application of semimechanized operation with coal seam undercutting. After 6 months of trial work no production effects were attained, so the trial mining field was...

[学科分类] 地质学

[关键词] Long way;Lignite layer;Semimechanized operation;Undercutting