煤矸石堆积体稳定性及灾害防治对策研究

Study on Coal Gangue Stability and Disaster Prevention Measures

在对矸石堆积体地质条件、结构特征和已有变形特征分析的基础上,分析了堆积体产生变形的机理和潜在破坏模式,并利用数值模拟技术对矸石堆积体的变形特征和破坏规律进行模拟,确定潜在滑动面位置和形态,分析各种工况下矸石堆积体的稳定性,确定相应的防治措施,并提出了防治矸石灾害的对策。实例研究表明,在强降雨的条件下矸石堆积体沿基覆界面滑动的可能性较大,同时在堆积体的后缘存在局部失稳的可能,采用削方压脚、排水及挡墙等综合治理方法可取得良好的防治效果。

Based on the exploration of the structure and deformation characteristics of gangue hill, the deformation model and potential failure model are analyzed. Numerical simulation technology is adopted to analyze the deformation characteristics and failure model, which helps confirm potential slid- ing surface. Then the stability of the gangue is calculated by limiting equilibrium theory, and the geohazard prevention measures are proposed. A studied example shows that the surface of the greatest possibility to slide is between bed rock and accumulated body and the effect is well after top-cut and press -bottom, drainage and retaining wall.