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本文根据灰色系统理论,用量测位移的反时间序列建立灰色GM(1,1)模型,以此模型预测巷道围岩在量测前发生的位移,然后以断面上围岩切向应力量测值和围岩收敛值以及量测前已释放的位移预测值之和为原始数据,用虚边界元法建立包含独立反算参数的线性方程组并求解各参数,最后求取加权平均后的综合反算值,并将其输入虚边界元程序,求出相应测线的相对位移,得到了令人满意的结果。
According to the gray system theory, a gray GM (1,1) model is established by using the inverse time series of measured displacements to predict the displacements of the surrounding rock of the roadway before the measurement. Based on the measured tangential stress of the surrounding rock The value of the surrounding rock and the convergence value of the surrounding rock as well as the displacement predicted value before the measurement are taken as the original data. The virtual boundary element method is used to establish the linear equations containing the independent inverse parameters and solve the parameters. Finally, the weighted average Inversely calculate the value and input it into the virtual boundary element program to find the relative displacement of the corresponding survey line, and obtain satisfactory results.