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与缓倾斜煤层开采相比 ,急倾斜煤系地层常隐含软弱夹层 ,其露头容易出现台阶和裂缝 ;与切割岩层的结构面比较 ,层间软弱面并不对移动盆地起全局控制作用 ,而只产生局部影响 通过综合考虑急倾斜地层与层间弱面两个因素 ,阐明了急倾斜煤层开采地表非连续变形的发生条件 ;采用相似材料模型实验 ,研究了岩层垮落、弯曲、离层的方式和形态 ;提出了急倾斜煤层开采岩层的层梁移动模式 ;揭示了地表非连续变形的形态特征和变形机理 ,为进一步研究地表非连续变形的计算提供了依据 图 7,表 2 ,参 7
Compared with the mining of gently inclined coal seam, the steep coal seam strata usually contain weak intercalations, and the outcrops are prone to the steps and cracks. Compared with the structural planes of cutting rock strata, the weak interbeds do not play a global control role in the moving basins. The local influence is produced. By comprehensively considering the two factors of the steeply inclined strata and the inter-layer weakness, the conditions for the occurrence of surface discontinuities in steeply-inclined coal seam mining are clarified. Using the similar material model experiment, the collapse, bending and delamination of the strata are studied And patterns of rock strata in steeply-inclined coal seam are proposed. The deformation characteristics and deformation mechanism of surface discontinuous deformation are revealed, which provide the basis for further study on the calculation of surface discontinuous deformation