College of Mining, Liaoning Technical University, Fuxin, 123000, China.
Sci Rep. 2022 Nov 21;12(1):20017. doi: 10.1038/s41598-022-24128-2.
Deformation and failure of the roadway surrounding rock under dynamic disturbance were explored, which is essential for the control of the surrounding rock. The impact of dynamic disturbance on the deformation and failure of the roadway surrounding rock was studied from a single factor perspective using numerical simulation software. The disturbance intensity, frequency, and time were determined to affect the deformation and plastic zone of the surrounding rock. Firstly, a multi-factor integrated study was achieved using an orthogonal experimental design, and the impact of the three factors on the deformation and plastic zone of the surrounding rock were studied by applying mean value and extreme difference. The results show that the degree of influence of deformation of the roof is time > intensity > frequency in order. The impact of the plastic zone volume is intensity > frequency > time in order. Finally, a multivariate regression model was established using multiple regression analysis. The P = 0 < 0.05 for the regression model is obtained by variance analysis, and the equation regression is significant, which can effectively predict the deformation and failure of the surrounding rock under dynamic disturbance.
探讨了动扰下巷道围岩的变形与破坏规律，这对围岩控制至关重要。采用数值模拟软件，从单因素角度研究了动扰对巷道围岩变形的影响。确定了扰强度、频率和时间对围岩变形和塑性区的影响。首先，采用正交试验设计进行了多因素综合研究，通过均值和极值差研究了三个因素对围岩变形和塑性区的影响。结果表明，顶板变形的影响程度依次为时间>强度>频率。塑性区体积的影响依次为强度>频率>时间。最后，采用多元回归分析建立了多元回归模型。方差分析得到回归模型 P=0<0.05，方程回归显著，能有效预测动扰下围岩的变形与破坏。
