论文部分内容阅读
研究开采沉陷灾害发生及发展的动态过程具有重要的理论意义和工程应用价值。因采场上覆岩层及采矿过程的复杂性,全面研究采矿过程中上覆岩层的移动及地表的沉陷具有很大的难度,以研究地表沉陷区观测点下沉变化过程的时间序列为切入点,对开采沉陷的动态过程进行了研究。通过研究地表沉陷区观测点下沉量的时间序列发现,Weibull(韦布尔)函数可较准确地拟合和描述地表观测点的下沉过程曲线。煤层开采地表移动过程的FLAC3D模拟研究发现,同一沉陷区内各观测点的下沉过程在时间和空间上具有独立性。在该基础上,将概率积分沉陷曲线模型与Weibull时间序列函数相结合,给出沉陷区主剖面的动态下沉、倾斜和曲率曲线的唯象学模型,经实例证明建模思路是可行的。
It has important theoretical significance and engineering application value to study the dynamic process of occurrence and development of subsidence disaster. Due to the complexity of overlying strata and mining process in the stope, it is very difficult to comprehensively study the movement of overlying strata and the subsidence of the ground during the mining process. Taking the time series of the process of subsidence as an example, , The dynamic process of mining subsidence has been studied. By studying the time series of the subsidence of observation points in the surface subsidence area, weibull function can fit and describe the subsidence curve of surface observation point more accurately. The FLAC3D simulation study of surface movement process of coal seam found that the sinking process of each observation point in the same subsidence area has independence in time and space. Based on this, the probabilistic integral subsidence curve model and Weibull time series function are combined to give the phenomenological model of the dynamic subsidence, inclination and curvature curve of the main section in the subsidence area. It is feasible to prove the modeling method through examples.