特厚煤层综放面小煤柱留巷煤柱宽度设计
특후매층종방면소매주류항매주관도설계
Design for Pillar Width of Retaining Roadway with Narrow Pillars at Fully-Mechanized Mining Face with Caving of Top Coal in Extreamly Thick Coal Seam
저자의 최근 논문