基于多项式法的地表移动变形计算模型修正

针对基于概率积分法的地表移动变形值计算结果误差较大，评价煤层开采后上覆构筑物危险性存在安全风险的难题.依据地表下沉值与其它移动变形值之间的计算原理关系，结合煤层开采后地表移动变形计算结果和实测结果，该文提出了利用多项式法对计算模型进行修正的方法，构建基于概率积分法和多项式法相叠加的地表移动变形值计算模型.以某矿已采工作面地表下沉值实测数据为例，研究结果表明：计算模型修正后得到的地表下沉值与实测结果之间的误差范围仅为0.1～0.4 m，极大的减小了计算模型的误差范围.

Modification of surface movement and deformation calculation model based on polynomial method

In view of the large error in the calculation result of surface movement deformation value based on probability integral method， there is a difficult problem of safety risk in evaluating the risk of overlying structures after coal seam mining. According to the calculation principle relationship between surface subsidence value and other movement deformation values， and combined with the calculation results and measured results of surface movement deformation after coal seam mining， a method of modifying the calculation model by polynomial method is proposed， and a calculation model of surface movement deformation value based on the superposition of probability integral method and polynomial method is constructed. Taking the measured data of the surface subsidence value of the mined face of a mine as an example， the research results show that the error range between the surface subsidence value obtained after the correction of the calculation model and the measured results is only 0.1～0.4 m， which greatly reduces the error range of the calculation model.