Study Of The Slope Stability On Residual Orebody Mining

In the process of the residual orebody mining, destruction of the original rock stress's equilibrium state, makes the slope and the certain limits surface produce displacement variation. In order to guarantee the normal mining of residual orebody, ensure the safety of life and property, protect the mineral resources and the surface environment, analysis and evaluation on the slope stability are very important, consequently we can take economic and reasonable protective measures based on the result of the analysis, to achieve nip in the bud.Taking gushan open slope as the research object, the article makes analytical investigation in allusion to the slope stability problems caused by the underground mining of residual orebody, the main research contents as follows:(1)Study of mine area's geology and the open and underground mining status;(2) The general factors influencing slope stability, study of slope stability effects and deformation law influenced by residual orebody mining;(3) Numerical simulation analysis of slope stability in the three cases of before and after residual orebody mining and after the goafs filling;(4)Fuzzy comprehensive evaluation of slope stability;(5)Economic and reasonable measures on slope protection.Based on summarizing the research achievements on the residual orebody mining, combining the gushan mining status, taking measures such as field exploration, theory analysis and numerical simulation etc., the article did researches on mining geological survey, rock mechanics properties, slope stability development regularity caused by underground mining, goaf processing and slope stability evaluation, obtained achievements as follows:(1)Analyzed geological survey, mine geology tectonic characteristics, hydrology geology and environment geology condition, proposed the general factors that influence the stability of the slope, focused on the impact on slope stability influenced by underground mining and slope deformation regularity, draw a conclusion:goaf located in different positions under slope everywhere effect is different, may be beneficial is also likely to produce adverse effect;(2)According to the mine actual situation, take safety coefficient mine slope allowed as 1.15, adopting Bishop analysis method calculated safety coefficients of line 11,13 and 15, obtained safety coefficients of the profiles, and compared with the allowed safety coefficient obtained its stability situation;(3) Sampled from the spot, did rock mechanics experiments and get Physical mechanical parameters of rock mass by processing data, did numerical calculation and analysis by Midas/GTS, finally got slope transformations stress and displacement field;(4)Adopt AHP-Fuzzy to do fuzzy comprehensive evaluation of slope stability, and learn that the overall slope is in the basic stable state;(5)Based on the above study results, the article put forward economic and effective protective measures aiming at dangerous parts of the slope where easy to landslide.The article based on the engineering practice, did slope stability study using methods combined mathematical theory and numerical simulation etc., had certain theoretical and practical value.