高应力区破裂岩体回采巷道一次强化支护技术及其应用研究

基于对高应力区破裂岩体回采巷道支护 10多年的经验和教训 ,本文首次提出了相对于主次承载区协调作用关系的关键支护技术 ,即一次强化支护技术。该支护技术不仅强调了对于高应力区破裂岩巷道支护时间的及时性 ,支护强度一次到位 ,更重要的是区别于先让后抗、二次支护的指导思想 ;同时 ,一次强化支护技术还详细明确了支护类型、支护结构以及施工工艺。该支护技术在小官庄铁矿高应力区的应用成功 ,表明该支护关键技术是正确的。

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.