The invention discloses a three-step
stoping method suitable for a deep, heavy and large ore deposit. The three-step
stoping method comprises the following steps: arranging panels along the directionof an ore body, temporarily reserving barrier pillars among the panels, and dividing the inner parts of the panels into stope rooms and pillars along the direction vertical to the ore body;
stoping: step one, stoping the stope rooms, and subsequently, carrying out
cement filling by whole
tailings; step two, stoping the pillars, and subsequently, carrying out weak cemented filling by the whole
tailings; step three, stoping panel barrier pillars, and subsequently, filling by the whole
tailings. The step one is used for stoping under a two-side primary ore and rock supporting condition, the steptwo is used for stoping under a two-side
cement filling
mass condition, and the step three is used for stoping under a three-surface filling
mass condition. The three-step stoping method disclosed bythe invention has the following advantages that principles of stress slow release and
dynamic balance are fully utilized, the safety conditions of stoping of panel stopes are improved, and regional
ground pressure control is facilitated; simultaneous stoping of multiple panels can be carried out, and the production capacity is large; the panel stoping
modes are flexible, and the production stabilization can be favorably maintained.