采场上覆岩层“三带”高度与岩性的关系

Relationship between Height of "Three Zones" and Lithology in Overlying Strata in Mining Yard

综采用于缓倾斜、倾斜煤层时,影响"三带"发育高度的主要因素有采煤累积厚度和采空区上覆岩性。根据公式可准确计算出"三带"的高度值,还可以依据采场及岩性的一些参数做地表变形预计图参考"三带"高度值。

When the fully mechanized coal mining is applied in the gently inclined and inclined coal seam, the main factors of influencing the development height of ＂three zones＂ are the cumulative thickness of coal mining, and the lithology of overlying strata in go~ The height value is accurately calculated according to the formula. According to some parameters of mining yard and lithology, the expecting map of surface deformation was made, for reference of ＂three zones＂ height values.