【摘要】 为研究急倾斜煤层开采覆岩垮落带破坏特征,以大台煤矿急倾斜煤层为研究对象,基于2台相似材料模型试验,分别研究了急倾斜煤层深部局部开采和浅部—深部全部开采垮落带的破坏特征和法向高度,并利用高分辨率地球物理勘探技术实测了大台煤矿深部开采垮落带的破坏形态和法向高度。结果表明,该矿急倾斜煤层深部局部开采垮落带易形成梯形拱形结构,法向高度约为煤厚的2.5倍,急倾斜煤层浅部—深部全部开采,垮落带呈带状分布,法向高度增大并趋于稳定,约为煤厚的5.0~6.0倍,物探成果表明煤层顶板垮落区与煤层近似平行,呈带状分布,顶板垮落带法向高度约为煤厚的5.6倍,与相似材料模型试验结果基本吻合。更多还原

【Abstract】 In order to research the failure characteristics of caving zone of steep seam mining,this paper took steep seam of the Datai Colliery as example,the two similar material models were employed to research the caving zone failure characteristics and the normal height of deep mining and shallow to deep mining. The failure pattern and normal height of caving zone due to steep seam deep mining of Datai Colliery were measured by the high resolution geophysical exploration. The results showed that the caving zone form trapezoidal arch structure due to the deep mining and the normal height was about 2. 5 times of the mining thickness. The caving zone form zonal distribution due to the shallow to deep mining and the normal height was about 5. 0 ~ 6. 0 times of the mining thickness. The geophysical exploration results showed that the caving zone form zonal distribution and the normal height was about 5. 6 times of the mining thickness. The results of geophysical exploration and similar material model were identical.更多还原