摘要
急倾斜煤层覆岩结构的复杂性,使得现有的理论不能很好的解释覆岩移动和地表沉陷规律,为了深入研究急倾斜煤层开采覆岩移动和地表沉陷规律,本文采用MIDAS/GTS对急倾斜煤层开采情况进行模拟,并将"三带"理论应用于急倾斜煤层的研究。根据煤层开采后覆岩移动规律和地表沉陷的特点将煤层开采分为浅部开采阶段和深部开采阶段。浅部开采阶段覆岩破坏范围较小,顶板形成以上下煤柱为拱脚的拱形结构,地表表现为非连续的塌陷坑;深部开采阶段基本顶断裂、垮落在采空区形成铰接结构,地表表现为连续的下沉盆地。
Complexity of steeply inclined seam＇s overburden structure make the existing theory can not explain well the laws of strata movement and surface subsidence. In order to further study the laws of steeply inclined seam＇s overburden strata movement and surface subsidence,this paper uses MIDAS / GTS to simulate the mining situation of steeply inclined coal seam,and applies the theory of ＂three belts＂to the study of steeply inclined seam. According to the characteristics of the movement law of overlying strata and the surface subsidence after mining,the seam mining is divided into shallow mining stage and deep mining stage. In shallow mining stage,overburden strata failure has a smaller range of damage,and the roof forms arch structure,which considers the the upper and under coal pillar as arch foot,and surface appears noncontinuous collapse pit. In deep mining stage,basic roof fractures and collapses over the goaf,which forms a hinge structure,and surface subsidence basin shows continuous.
出处
《中国地质灾害与防治学报》
CSCD
2016年第4期74-80,共7页
The Chinese Journal of Geological Hazard and Control
基金
国家自然科学基金(51274111)
