Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/5582218/figures/5582218.fig.008a.svgz" name="5582218.fig.008a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>The layout of survey points for the first step</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/5582218/figures/5582218.fig.008b.svgz" name="5582218.fig.008b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>The layout of survey points for the second step</td></tr></table>

<div>The layout of survey points on the surrounding rock and overlying strata in the PFC model for the first excavation step and the second excavation step.</div>

Geofluids

fig8

Figure 8

Figure 8: Macro-Micro Response Characteristics of Surrounding Rock and Overlying Strata towards the Transition from Open-Pit to Underground Mining 