Analysis of Excavation Stability and Reinforcement Treatment of the Cutting Slope under the Influence of Old Goaf

To analyze the excavation stability and reasonable reinforcement measures of cutting slope with a goaf collapsed roadway mining face, finite element software Midas GTS NX was used to model change in coefficient under different ratios. Combined scope project land, it is proposed that ratio grades 1–3 (close top cut) 1:1.5, while 4–6 bottom 1:1, excavate slope. During process, plastic zone after each level further analyzed, control variable method influence face on stability. We found one main factors affecting slope, effects schemes were we can be stabilized by third- fourth-level slopes adjacent face. In this study, old are combined, analyzed coupling. This research provides scientific basis for analysis goafs future has great practical engineering significance.