三角块结构相关论文
针对沿空掘巷技术,研究沿着工作面长度方向,基本顶来压形成"O-X"断裂后,在沿空掘巷的上部边界形成弧形三角块结构,通过建立三角块......
Focusing on the stability of surrounding rock around the roadway driving along next goaf with a narrow coal pillar, a me......