地面沉降预测参数的变化规律与计算方法

为了合理确定非层状地下空间环境条件下地面沉降预测模型中的预测参数,基于地下空间围岩破坏机理及地面沉降规律,分析了预测参数与地下空间形状之间的内在联系,探讨了预测参数的变化规律,并导出了预测参数的计算公式.根据非层状地下空间处地层产状及定位特征点数,给出了确定地层构造形态的方法.最后,给出了1个预测实例.结果表明,用该方法预测地面沉降,其预测精度比传统方法提高约40%.

Variation Laws and Computational Methods of Surface Subsidence Prediction Parameters

To reasonably determine prediction parameters in a surface subsidence model for an underground non-bedded shape room environment, the internal relations between prediction parameters and underground room shapes were analyzed based on the principles of surface subsidence. In addition, the variation laws of prediction parameters were investigated and the corresponding calculational formulas were derived. From the attitude of strata and the number of characteristic point at an underground non-bedded shape room, the method to determine the equation of stratum structure was presented. Finally, a practical example of surface subsidence predicting was given. The predicted result shows that compared with the conventional method, the proposed method raises the prediction precision of surface subsidence by about 40%.