105 Orebody Mined Stability Of The The Guangxi Peak Deep And Filling Processes And Systems

The 105~# ore body is a successive deposit of limited company of Gaofeng Mining Corporation limited, Guangxi, China. A number of illegal mining activities left lots of old shafts, shifts and emptied areas, which is harmful to safe production of the mine. It is necessary to investigate these fatal sources, to clarify their spatial distributions, to analyse their stabilities and to evaluate their risk.degreesfill, as well as to scientificly evaluate current filling system, ahead of recovery of left mineral reserves. The tasks mentioned are carried out in this paper by means of field investigation, laboratory test, therotical analysis and system design, and main conclusions are obtained as follows:1. Numerical simulation results indicate that emptied areas, especially such large ones as No.1, 5, 7 and 8, are potential harmful resources for extraction of 105~# ore body;2. Potential safety problem due to emptied areas could be solved by filling works according to numerical calculation;3. Trial experiment of material component gives basic filling parameters in weight as follows: tailings - crushed sand ratio of 3:1, cement-aggregate ratio of 1: 6, and slurry density of 68-70%;4. Fly ash is suggested to adopt in filling materials if possible because addition of fly ash can improve hydraulic conveying proprety of slurry and reduce cost of filling;5. Current preparation system of filling slurry can still be used for filling works of 105~# ore body;6. Economic and technical comparison among three drafts suggests that 10~# blind inclined shaft system is an optimal choice because of low capital and short pipeline.