论文部分内容阅读
影响函数法广泛应用于地下层状矿体的开采沉陷计算。理论上,该方法适用于水平地表条件下的沉陷预计。将地形变化纳入影响函数法,使此方法可以应用于非水平地表条件下。为了剔除其他开采和地质因素的影响,除地形变化外可能影响沉陷形态的因素都被固定了的简化数值模型被应用于研究中。根据这些数值模拟实验的结果,若干影响函数法的参数,包括影响半径、影响角和下沉率,通过4个地形相关的修正系数被重定义为地表相对矿体高程的函数。优化后的影响函数法可以更好的拟合非水平地表条件下的数值模拟结果和现场观测数据。相较于经典影响函数法,该方法需要将地表点相对矿体的高程作为输入数据。在其他开采、地质条件下,构建简单数值模型的方法可以被用于估算相应条件下的地形影响修正系数。
The influence function method is widely used in the mining subsidence calculation of underground layered ore body. In theory, this method is suitable for subsidence prediction under horizontal surface conditions. The inclusion of topographic changes in the influence function method enables this method to be applied to non-horizontal surface conditions. In order to eliminate the effects of other mining and geological factors, a simplified numerical model with fixed factors other than topographical changes that may affect the subsidence morphology was applied to the study. Based on the results of these numerical simulations, several parameters influencing the function method, including the influence radius, influence angle and sinking rate, are redefined as the function of surface relative ore body elevation by correlating the four topographic corrections. The optimized impact function method can better fit the numerical simulation results and field observation data under non-horizontal surface conditions. Compared with the classical influence function method, this method needs to take the elevation of the surface point relative to the ore body as the input data. Under other mining and geological conditions, the method of constructing a simple numerical model can be used to estimate the correction factor for topographic effects under the corresponding conditions.