Strong mining tremors (SMTs) frequently occur in super-thick strata near the goaf when mining. Since 2021, there have been three consecutive SMTs with magnitude greater than 2.0 longwall 1208 of Shilawusu Coal Mine. These caused mine production to be suspended for more 290 days and affected over 100 households located on shaking ground, seriously threatened safety underground workers restricted...

Surface subsidence in coal mine areas can cause serious geological hazards. After a seam is mined, the overlying rock layers fracture, collapse, and expand; fractured bulking masses are then continuously compacted under action of overburden load, which eventually leads to surface subsidence. Overburden isolated grout filling via boreholes, high-pressure grouting mining-induced fissures hard lay...