施加第2级荷载后，出现第2条微裂隙，与坡顶线斜交，随着时间延长，裂隙走

After the second-level load is applied, a second micro-crack appears, which obliquely crosses the top line of the slope. As time passes, the direction of the crack deflects perpendicular to the top line of the slope. A third crack appeared in the middle area of ​​the surface, perpendicular to the top line of the slope, and the crack gradually extended to the top and toe of the slope. After <br>the third load was applied, a fourth crack appeared at the edge of the slope, and the crack extended to the toe of the slope. 2,3 bar fracture width becomes large and extend to the toe, <br>Article 5 is applied after the fracture load level 4, occurs perpendicular to the top line in slope, 2,3,4 article further increased fracture width, <br>in At the end of the experiment, the toe area of ​​the slope was broken, and the marking points were separated from the slope surface or even disappeared, which fully indicated that the slope toe was severely bulged and the model slipped. verify.

After the second level load is applied, the second micro crack appears, which intersects obliquely with the slope top line. With the extension of time, the crack trend deflects and is perpendicular to the slope top line, and some marked points at the slope toe are separated from the slope surface and slightly uplifted. At the same time, the third crack appears in the middle area of the slope, which is perpendicular to the slope top line, and the crack gradually extends to the slope top and toe,<br>After the third level load is applied, the fourth crack appears at the edge of the slope, and the crack extends to the slope toe. At the same time, the width of the second and third cracks increases and extends to the slope toe,<br>After the fourth level load is applied, the fifth crack perpendicular to the slope top line appears on the slope, and the width of the second, third and fourth cracks further increases,<br>At the end of the experiment, the slope toe area is broken, and the marked points are separated from the slope or even disappear, which fully indicates that the slope toe is seriously bulging and the model slides, which is mutually verified with the tensile shear failure at the bottom of the slope toe of the waste dump with K = 0 in Figure 15.<br>

After the second-level load is applied, the second micro-crack appears, which is oblique to the top line of the slope. As time goes on, the crack trend deflects perpendicular to the top line, and some marked points at the foot of the slope are separated from the slope and slightly bulged. At the same time, the third crack appears in the middle area of the slope, which is perpendicular to the top line and gradually extends to the top and foot of the slope. After the third load is applied, the fourth crack appears on the slope edge, which extends to the foot of the slope, while the width of the second and third cracks increases and extends to the foot of the slope. After the fourth load is applied, the fifth crack perpendicular to the top line appears on the slope, and the width of the second, third and fourth cracks further increases. At the end of the experiment, the area at the foot of the slope is broken, and the marked points are separated from the slope or even disappear, which fully indicates that the foot of the slope bulges severely and the model slides, which is mutually verified by the tensile shear failure at the foot of the dump with K=0 in Figure 15.