# Stability and Distribution of Rock Slope under Asymmetric Excavation
## 5 Conclusions  
1. Due to the influence of the surrounding geological structure, the significant influencing factors affecting the initial position of the south slope were mainly the excavation dip angle and excavation depth of the north slope, and the influence of the excavation dip angle of the north slope was greater than that of the excavation depth of the south slope. When controlling the scope of the stable zone of the south surface, the excavation depth should not exceed 450 m.
2. With an increase in the distance between the F1 fault and the top of the slope, the range of the unstable area on the north side of the open-pit mine gradually expanded, while with an increase in the F1 fault dip angle, the range of the unstable area gradually decreased. In the process of open-pit mining, the range of the unstable area in an area containing a reverse fault can be reduced by reducing the distance between the fault and the top of the slope and selecting a position with a fault dip angle less than 60\({}^{\circ}\) for excavation construction. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Target Parameter** & **Source of Variation** &
\begin{tabular}{c} **Class III Sum of** \\ **Squares** \\ \end{tabular} & **Mean Square** & **F** & **Significance** \\ \hline \multirow{10}{*}{South side, hold steady} & Excavation inclination on south side & 3304.519 & 1652.259 & 0.088 & 0.093 \\  & North slope of excavation & 278,767.185 & 139,383.5 & 7.461 & 0.001 \\  & South-side excavation depth & 853,99.407 & 42,699.70 & 2.286 & 0.002 \\  & Excavation depth on the north side & 130,507.852 & 65,253.92 & 3.493 & 0.081 \\  & F1 fault dip & 108,208.074 & 54,104.03 & 2.896 & 0.113 \\  & F1 distance from the top of the slope & 40,471.185 & 20,235.59 & 1.083 & 0.383 \\  & F1a fault dip & 104,651.630 & 52,325.81 & 2.801 & 0.120 \\  & F1a distance from the top of the slope & 148,866.074 & 74,433.03 & 3.984 & 0.063 \\  & Seam thickness & 191,26.741 & 9563.370 & 0.512 & 0.618 \\ \hline \multirow{10}{*}{North side, hold steady} & Excavation inclination on south side & 261,609.185 & 130,804.5 & 4.688 & 0.000 \\  & North slope of excavation & 683,643.185 & 344,821.5 & 12.251 & 0.001 \\  & South-side excavation depth & 204,758.296 & 102,379.1 & 3.669 & 0.074 \\  & Excavation depth on the north side & 45,606.741 & 22,803.37 & 0.817 & 0.475 \\  & F1 fault dip & 1979,923.852 & 98,961.92 & 3.547 & 0.032 \\  & F1 distance from the top of the slope & 356,293.407 & 178,146.7 & 6.385 & 0.028 \\  & F1a fault dip & 635,85.852 & 31,77.926 & 0.114 & 0.894 \\  & F1a distance from the top of the slope & 77,378.741 & 38,689.37 & 1.387 & 0.045 \\  & Seam thickness & 195,829.407 & 97,914.70 & 3.509 & 0.081 \\ \hline \multirow{10}{*}{Range of instability} & Excavation inclination on south side & 5088.22 & 2544.111 & 0.534 & 0.606 \\  & North slope of excavation & 8744.667 & 4372.333 & 0.918 & 0.092 \\ \cline{1-1}  & South-side excavation depth & 13,601.556 & 6800.778 & 1.428 & 0.295 \\ \cline{1-1}  & Excavation depth on the north side & 4301.556 & 2150.778 & 4.51 & 0.652 \\ \cline{1-1}  & F1 fault dip & 32,108.222 & 16,054.11 & 3.370 & 0.001 \\ \cline{1-1}  & F1 distance from the top of the slope & 72,032.000 & 36,016.00 & 7.560 & 0.000 \\ \cline{1-1}  & F1a fault dip & 4648.667 & 2324.333 & 0.488 & 0.631 \\ \cline{1-1}  & F1a distance from the top of the slope & 12,048.222 & 6024.111 & 1.265 & 0.133 \\ \cline{1-1}  & Seam thickness & 1910.222 & 955.111 & 0.200 & 0.822 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: \(Cont.\)3. The significant influencing factor of the safety factor was the mode of open-pit mining, and the influencing order was as follows: north slope > south slope > north slope > south slope. With increases in the excavation inclinations of the north slope and south slope, the safety factor decreased greatly. The safety factor of the south slope should be designed to be less than 35\({}^{\circ}\), and the safety factor of the north slope should be designed to be less than 30\({}^{\circ}\). Conceptualization, H.S.