Purpose. Creating a generalized algorithm to account for factors (coal seam thickness, enclosed rock mechanical properties, the dimension and bearing capacity of artificial support patterns) causing gateroad state under effect longwall face goaf. Methods. The assessment stability is based on numerical simulation stress-strain (SSS). finite element method used find out changes in SSS surrounding...

Large-area goafs in a gypsum mine tend to collapse after 10 or more years, but the influencing factors are still unclear, and effects of multiple have not been comprehensively considered. In this study, failure mechanism mode room-pillar goaf structure were analyzed, uniaxial compressive strength tests pillars under different conditions carried out laboratory. The influences water, temperature,...

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...