Research Of Mining Method And Supporting Technology For Weak Ore Body In Jinshandian Iron Mine

Mining ore body in weak rock is always a stubborn problem in mining engineering. IN this paper, studying on the weak and fragmentized ore body above the -270 meter level in Jinshandian Iron Mine, the author tried to survey effect of stope structural parameters to tunnel stability and tunnel supporting technical for weak rock.In the second chapter of this paper, basing on the data by surveying and exploring on the spot, the writer systematically summarized the mining technological conditions of weak ore body in Jinshandian Iron Mine; In succession,after analyzed and compared the virtues and defects of some dominating mining methods adopted previously in Jinshandian Iron Mine, the writer selected Sublevel caving without sill pillar as mining method for ore body above the -270 meter level in Jinshandian Iron Mine, and then propose to optimize the, improve Tunnel Supporting technology; In the forth chapter, by the method of numerical simulation and calculation, aiming to enhance stability of tunnels in weak rock, the writer constructed computer models for underground stope, then optimized stope structural parameters. At last, in the fifth chapter, the author investigated current tunnel supporting technology in Jinshandian Iron Mine systematically, and has improved it, which can provide academic basic for safety produce in the mine.By researching this task, the technical problem of tunnel collapse in weak ore body in Jinshandian Iron Mine has been solved basically. It also can direct produce and practice in similar mines significantly.