开采沉陷动态预计流变模型及应用

Rheological model of Dynamic Prediction on Mining Subsidence and Its Applications

通过对采场覆岩移动变形规律进行研究,从流变力学角度,给出地表下沉时间位移函数,并结合实测资料对有关参数进行回归分析,运用推导公式与实测资料进行了结果对比,总结出符合大同矿区地表动态下沉经验公式。提出地表下沉推迟时间tr的概念,可作为划分开采沉陷剧烈程度的量化指标。

Based on the study of the movement and deformation regulation on overburden strata of the mining field, a time-displacement function of surface subsidence is provided in light of rheology; and by using the method of regression analysis, this paper gives out an empirical formula of dynamic surface subsidence suited to Datong mining area, the calculated results are fitted well with the actual measurement. Besides, the authors put forwards the index of the retardation time for the surface subsidence firstly, which can be used as numerical indicator for mining subsidence areas.