Abstract:

The underground of Sizhuangmining area exists old workings thatwas formed byminingmethod of past, because we can’t take filling treatment method for old workings for long times, it lead to parts of general collapse and form hidden danger of orebody nearby mining. Through construction of a little under direction patio engineering and gap transfixion, erection of grizzly for backfilling lots of waste rock produced tunneling engineering,we make dry backfill forworkings, and recovery top pillar ore of primary shrinkage method as backfilling roof contact. The comprehensive treatmentmethod is advantage of low cost, consump tion of tunneling waste rock, recovery ore pillar, and has reference value for old workings of similar middle-small mine.

Key words: Workings treatment, Dry backfill, Recovery top pillar, Sizhuang mining area, Jiaojia gold mine, Shandong