Yunnan Open Pit Stope Rock Mechanical Parameters And Stability

Open-pit rock slope engineering is for the structure of engineering materials and engineering to mining operations and the formation of means for the construction of large-scale rock engineering.With the increase in the depth of open-pit mining, a high degree of year-on-year increase of slope, and gradually form a high and cliffy open slope, which led to worsening conditions for the extraction of production, so that the maintenance of open-pit slope of the more difficult to mine production and living brought great harm and economic loss. So how to open-pit slope stability analysis in a rational manner has gradually become specialized study.Open-pit slope stability analysis to determine the geotechnical parameters of the mechanical strength of the premise. Because rock and soil as a result of discontinuities, non-uniform and time-varying characteristics, a reasonable accurate determination of geotechnical parameters is the physical rock excavation, reinforcement, support, and ensure construction safety, engineering, economic, and building safety of the basic parameters of the project. Therefore, it works for the rock mass (slope, underground engineering, etc.) the calculation of the stability of simulation analysis and evaluation, engineering design, and engineering practice are of great significance.This paper about the study where at an open-pit mine in YunNan, ManJiaZHai south slope engineering. Apply Geological Survey, indoor soil test, point load test and the scene in situ by means of direct shear test to determination of parameters, stability analysis and evaluation of rock mass quality based on the corresponding. For the determination of parameters, First of all, for the actual construction of the open pit and the available relevant information, Laboratory test in order to come to the physical and mechanical parameters of rock and rock mass quality evaluation scores based on RMR, and comprehensive consideration of jointed rock fissures, rock structure, the impact of groundwater use Hawk-Brown (Hoek-Brown) strength criterion rock mechanics parameters to be revised discount converted into rock mechanics parameters, Then check the in situ test and limit equilibrium back-analysis method compared to results from the parameters of rock mass mechanical parameters of the final. The study will compare the two measures to get the outcome of the solution parameters to determine the accuracy, comprehensiveness and so on, has some innovative.In the survey, research based on the above difference method (FLAC numerical analysis software) carried out the status obtain the static slope stability analysis of the status of open-pit slope, and slope stability analysis of the latter part of the exploitation of mines with to potential safety problems. In order to ensure the safety of the exploitation of the latter and ultimately the stability of the slope, the ultimate reasonable slope angle and the corresponding control, regulatory measures. In this paper, the findings of stope mine slope stability and follow-up of the design, production engineering of practical significance.