Rock Mass Stability Analysis And Reinforcement Study Of A Skarn Mine

As one of the main mining methods of mineral resources,open-pit mining,while obtaining huge economic benefits,the problems it brings cannot be ignored.The continuous extension of mining depth will lead to the formation of high and steep slopes.In addition,the end of mining is the maximum economic benefit,and the final slope angle will often be close to the limit safety allowable value.Such slopes are extremely vulnerable to instability,and have the characteristics of sudden occurrence,rapid spread,wide threat range,and high degree of damage.The stability of mine slopes is a major problem affecting mine safety and production.This article takes the east slope of Tonglushan Mine in Daye City as the research object to conduct stability research and analysis,conducts displacement monitoring on the open slope,and finally puts forward measures for reinforcement and treatment.The main research work and results are as follows:(1)Fully study the site and engineering data of the mine slope,thoroughly study the current status and characteristics of the slope and obtain the physical parameters required for the study,to provide a basis for further adequate research.(2)Using the three limit equilibrium methods included in the GEOSLOPE software to obtain the safety factor of the A-A ’slope in the natural dead weight state,dead weight +rainfall state;then the FLAC3 D software was used to simulate the slope,and the results and limits The balance method is basically the same;the analysis shows that the slope is stable when it is in its own weight state;the slope is relatively stable when it is in the rain state;For expansion and extension,the slope shall be reinforced.(3)Using the three limit equilibrium methods of GEOSLOPE software to obtain the safety factor of A-A ’slope under natural dead weight,dead weight + rainfall conditions;FLAC3D software was used to simulate the slope,and the results and limit balance The method is basically the same;the analysis shows that the slope is in a stable state under natural conditions;the slope is in a relatively stable state under rainfall conditions;To deepen,the slope shall be reinforced.(4)The real-time monitoring of slope displacement and numerical simulation results are combined for comprehensive analysis to verify the rationality of the numerical simulation analysis.Finally,based on the exposed stratum of the slope and the combination of lithology and simulation analysis,a reasonable reinforcement plan was designed,and the A-A ’slope was reinforced by prestressed anchor cables.The parameters of anchoring angle and anchor cable are calculated.Finally,FLAC3 D is used to verify the reinforcement effect of the slope,and the analysis results can be used to improve the safety factor,and it is concluded that the reinforcement measures are feasible.