摘要
采用相似材料模拟实验研究方法 ,对急斜特厚煤层水平分段放顶煤开采上位顶煤与采场上覆岩层运动与破坏规律以及地表变形进行了系统的研究 ,阐明了上位顶煤与采场上覆岩层存在不稳定拱和地表向顶板方向偏移的非对称性下沉。
Through the simulation test in laboratory, the movement and failure law of the top coal and overburden and surface deformation are systematically studied in horizontal section top coal caving in steep seam. It is clarified that there exists an unstable arch in top coal and overburden and an unsymmetrical subsidence deviating to the roof.
关键词
急斜煤层
不稳定拱
非对称性下沉
steep seam
unstable arch
unsymmetrical subsidence
