陕西煤炭

煤矿采空区地面塌陷治理的前提是正确预测评价地表变形的范围及变形强度,而地表变形的强度与多种因素有关。其中开采煤层的采深采厚比值与采空区的地表变形关系十分密切。通过对几个工程实例的探讨认为:当开采煤层的采深采厚比介于30～100时,采空区地表变形较为强烈,对采空区影响范围内的人类工程活动等的危害也较大。因此建议在进行采深采厚比计算时,宜将深厚土层按一定比例换算成岩石的厚度后,再进行评价更为合适。

The premise of ground subsidence control under coal mining area is forecasting correctly surface deformation scope and intensity that influenced by many factors.Engineering practice shows that ground deformation under mined-out area is relatively strong when the ratio of mining depth and thickness is about 30 to 100.It's more appropriate to convert the soil to a certain percentage of bed thickness in calculating the ratio of mining depth and thickness.