摘要
矿井开采引起地表沉陷裂缝以平行开采工作面倾向为特征,在采空区边缘地表拉伸区未见明显的裂缝,而裂缝主要集中出现在对应采空区中央区域。文章以韩家湾煤矿2304工作面开采为研究对象,通过分析地质采矿条件,应用岩梁断裂理论和UDEC离散元计算模拟方法,分析了大采高开采覆岩移动变形的运移过程,揭示了地表裂缝分布形态与覆岩断裂结构演化的内在关系,给出了影响采空区地表裂缝形式的主要因素以及形成这种特殊裂缝分布形态的机理。
Mining subsidence caused by mining is characterized by its parallel inclination with mining face, no obvious cracks, in goaf edge surface tension zone, cracks are mainly concentrated in the central region of the corresponding goaf. Taking Hanjiawan coal mine 2304working face mining as the research object, through studying the geological and mining conditions, applying rock beam fracture theory and UDEC discrete element simulation, the movement and deformation process of the overlying strata caused by large cutting height mining, the internal relations between surfaee crack distribution and structure evolution of overlying strata fracture were revealed , the key influencing factors of goaf surface cracks form and the formation mechanism of this special crack distribution were proposed.
出处
《煤炭工程》
北大核心
2014年第5期84-86,共3页
Coal Engineering
基金
教育部博士点基金项目(20106121110003)
陕西省自然科学基金项目(2011JY005)
关键词
大采高
浅埋煤层
岩梁断裂理论
地表裂缝
large cutting height
shallow seam
rock beam fracture theory
surface cracks
