are mainly distributed in the roof, bottom and intercolumn of the stope; (3) When the goaf is backfilled from top to bottom, the stress-strain changes at each stage are uneven: the maximum principal stress changes slowly in the early stage, but greatly in the later stage; The change of displacement showed a trend of slowing down in the early stage and stabilizing in the later stage: (4) "waste rock filling + cemented filling" roof joint can realize the transformation of solid waste into treasure in mines, effectively promote the construction of green mines, and is an effective means of goaf treatment.
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Study on the stability of waste rock filling in goaf based on dynamic comprehensive analysis method.
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