9.Numerical simulation study on multi-working facemining under slope body

Abstract:

Unreasonable coal mining beneath mountainous terrain frequently triggers geological disasters，including landslides，ulti-mately causing unforeseeable catastrophic damage and significant casualties． To mitigate the risk of landslides stemming from coal ex-traction，the study，using the Guanwen Coal Mine in Sichuan Province as a case study，employs FLAC3D numerical simulation softwareto explore the impact of inclined multi-face mining on slope stability． The findings reveal that the slope remains stable prior to miningactivities． However，upon the extraction of the 11 902 and 11 102 working faces，severe landslides are anticipated to occur on theslope． Consequently，a disaster mitigation mining method involving the retention of boundary coal pillars is proposed．

Keywords: deep landslide; underground mining; overburden rock failure; slope stability; boundary coal pillar