急倾斜矿层开采地表移动变形预计

Prediction of the Surface Movement and Deformation of Steeply Inclined Ore Seam Mining

常用预计方法不适用于急倾斜矿层开采地表下沉预计,预测结果与实测数据相差较大,难以符合实际生产要求。在急倾斜矿层开采地表移动变形预计中一般采用皮尔森Ⅲ型函数,由于该模型所需的计算参数较多且求取方法较为复杂,在实际工作中并未得到广泛应用。采用改进的皮尔森Ⅲ型函数进行急倾斜矿层地表移动变形预计,改进后的皮尔森Ⅲ型函数与经典皮尔森Ⅲ型函数具有相同的性质,参数物理意义明确且方便求解应用。根据某金矿地表移动观测资料,采用改进的皮尔森Ⅲ型函数为预计模型,应用MATLAB软件进行了模拟计算,预计了急倾斜金矿层开采引起的地表下沉、倾斜和曲率,分析了地表移动变形预计的特点,为金矿建(构)筑物下安全开采提供了依据,为实现急倾斜矿层开采地表移动变形精确预计奠定了基础。

The commonly-used prediction methods are not suitable for the prediction of surface subsidence in steeply inclined ore seam mining.The prediction results are quite different from the measured data,and it is difficult to satisfy the actual production requirements.Pearson type Ⅲ function is generally used to predict surface movement and deformation in steeply inclined ore seam mining.Because the model needs more calculation parameters and the method is more complex,it has not been widely used in practical work.In order to solve the above problems,the improved Pearson type Ⅲ function is used to predict the surface movement and deformation of steeply inclined seams.The improved Pearson type Ⅲ function has the same properties as the classical Pearson type Ⅲ function.The physical meaning of the parameters is clear and the parameters are easily solved and applied. Based on the observation data of surface movement of a gold mine,the improved Pearson type Ⅲ function is used as the prediction model,and the simulation calculation is carried out by MATLAB.The surface subsidence,inclination and curvature caused by steeply mining of gold mine are predicted.The characteristics of surface movement and deformation prediction are analyzed,which provide a basis for the safety mining under structures and buildings in a gold mine,furthermore,the improved Pearson type Ⅲ function provides a basis for the accurate prediction of the surface movement and deformation in steeply inclined ore seam mining.