"两硬"条件厚煤层网下放顶煤开采支架与围岩相互作用关系探析
"량경"조건후매층망하방정매개채지가여위암상호작용관계탐석
Mutual Relationship Analysis of Supports and Surrounding Rock in Caving Mining under Metal Mesh in Thick Coal Seam with Hard Roof and Hard Coal