Influence of Deep Thick Alluvium Wide Strip Skip Mining on Surface Subsidence

To solve the problem of low recovery rate of strip mining technology, the use of characteristics of small surface movement and deformation under the condition of large mining depth and thick alluvium, based on the principle of critical deformation value of buildings, we proposed wide strip skip mining techniques to improve the rate of coal mining, and to liberate deep coal under buildings. We used FLAC numerical simulation to analyze the impact of coal mining and sequential mining jumping on the surface. Finally, we verified the feasibility of the technology by a project example.