It is difficult to control roadway floor under strong mining pressure in deep mine.Taken 1103 panel roadway as the research background,the mechanism and technology of floor heave control of deep roadway with strong mining pressure is studied with theoretical analysis,laboratory test numerical simula-tion and field test in order to solve the problems of floor heave control in deep roadway.The results show that the main reasons for floor heave are low strength of surrounding rock,high mining stress and un-coupling relationship between support and surrounding rock.The bottom angle is the key to floor control.The theory and technical system concentrating on pressure relief and strengthening support is proposed.Moderate release of floor stress by slotting at bottom angle and the multi-level coupling reinforcement technology of pouring backfill pressure relief groove,strong support of cable bundle,layered high-effi-ciency grouting and strong-tough layer sealing and hardening are adopted to form a multi-level pressure relief and strengthening coupling strong bearing structure suitable for floor stress and deformation,which can effectively control the deformation and failure of floor.The technical parameters of floor pressure re-lief and strengthening coupling control are determined and successfully applied to the floor heave control of deep roadway with strong mining pressure.
关键词
底鼓/卸压与强化/高效注浆/锚索束支护
Key words
floor heave/pressure relief and strengthening/efficient grouting/cable bundle support
维普
万方数据