Study On Stability And Stability Of Steeply Dumping Dump In Open Pit

Jinping 3# dump in a mine as the research object, this paper analyzes the security problems typical of steep hillside foundation dump. Safety analysis is generally through the search, analysis and forecast, system engineering, production activities in the process of potentially dangerous and harmful factors and possible risk, extent and consequences, and finally puts forward the research process of the feasible security measures. Study on the safety of safety science that includes the discovery of risk source, risk source analysis and preventive measures, and ultimately to achieve the purpose of safe and stable operation of the system.The dump is one of the major constraints of mine safety hazards, on the steep slope of the dump imminent. At present, the dump slope in the original foundation between 12 degrees -30 degrees, the average slope of 25 degrees, a steep basement dump. Design and dump heap row height is 230 meters, the heap has reached 134 meters high, and the heap row continues, there is a big security riskAnalysis and Research on the security of the dump. First, the paper collected a lot of literature in the previous work, including comprehensive analysis, similar to steep basement dump the local analysis, stability analysis, including disaster patterns, soil material properties, the dump mound, row surrounding and other related issues. Second, in the process of practice, the dump, follow up the production status, analysis of dump, content analysis before comparing the obtained model of the disaster dump, summed up the reference data. Third, make the safety analysis of the current stackpile analysis method using accident tree. From the security analysis revealed that the stability of the dump is the dump safety analysis of the largest impact factors, then the analysis of stability of dump. Fourth, according to the field investigation and engineering dump of the mine field design data and other relevant documents of the dump, dump the typical profile position, application of fast Lagrange method for numerical simulation, the simulation object is the dump the accumulation and basal mountain slope.Based on analyzing the stability of the dump in the corresponding geological model into FLAC3D simulation, dump material properties, combined with the analysis process and the heap heap row row design, will be continued in the heap dump from the bottom to the top is divided into three regions, the first region for the stage tailing dam above third and fourth, second and the fifth to seventh regional level, third to eighth and ninth regional level. The simulation process was evident when the heap row to 30 degrees of the ground section, there are obvious potential sliding surface of slope shoulder slope, slope toe is called compression phenomenon, ground terrain slope where the shear strain rate faster, there are security risks. The research also revealed with the regional load superposition, the mine dump slope deformation and failure mode for expelling internal sliding and sliding composite, and then the three regional accumulation of safety coefficient of rear dump, the safety factor of third regions were the first to 2.1,1.7,1.4: regional, meet the requirement of safe production, relatively stable. Finally, according to the site condition influence of foundation dump safety factors on put forward corresponding measures and suggestions to carry out effective management, improve the whole dump process safety, ensure the safety and efficiency of mine harvest.Provide reference, safety of the research in basement in other similar steep for the dump dump safety related research provide scientific basis as well as other mine dump it, has a certain significance of production safety supervision and management of the research to the dump, with the practical significance of security research on steep basement dump.