STUDY ON THE ONCE REINFORCED ENHANCED SUPPORT TECHNIQUES FOR STOPE DRIFT IN THE HIGH-STRESS FRACTURED ORE BODY AND ITS APPLICATION

Based on the experiences in the ongoing mining engineering practice in the high-stress fractured ore body, the paper first presents a key support technique(OTEST) according to the primary-secondary coordinated interaction zones. The technique not only emphasizes support time and support strength for fractured rock in roadways under high stress, but it most importantly different from the conventional to first evade then to resist, and to take secondary support guiding principle. Further , OTEST has also its detail and clear definition of the support type, support structure and operation procedure. The successful application experience of this technique to typical sites at the Xiaoguanzhuang Iron Mine shows that the technique OTEST is correct and useful.