Failure Mechanism And Control Measures On South Slope Of Fushun West Open-pit Mine

Slope stability of open-pit mine is always the key technology problem in open-pit mine production, and has been the elementary sentence of rock mechanics and other related subjects. The stability of open-pit slopes is directly related to the economic benefits and safety production of open pit mining. By the statistics, when the overall slope angle of a large high slope add a steep degree, can save the cost of striping rock over ten million yuan even hundred million yuan. So carry out in a deep-going way of the mechanism of sliding instability, as well as stability analysis on high rock slope; has important theoretical and practical significance to ensure safety mine production.The engineering background of this article base on the south side slope of Fushun west open-pit mine. through Site investigation, experimental analysis, data integration, theoretical research, numerical simulation, etc. acquire mechanic parameters of rock mass of south side slope and conduct rock mass quality classification, at the same time build three-dimensional geological model. Conduct failure mechanism research use RFPA in different research plan, use Geo-slope for evaluation of slope stability and propose prevention countermeasures. The propose research of this article as follows:1. Through site investigation and data compilation, confirm engineering geological condition of mining area; according to mine plan and geological section map, use 3D-Mine build three-dimensional geological model of mining area.2. Conduct the rock dynamic experiment, and acquire the physical and mechanical properties of rock. Use ShapeMetrix 3D digital photogrammetry measuring system, acquire the information of the structural plane and complete the rock quality designation. Base on the modified generalized Hoek-Brown strength criterion, acquire the compressive strength (UCS), tensile strength, Young’s modulus, cohesion and internal friction angle of rock mass.3. Build the geological model figure of south slope, and raise different research programs. Base on Strength reduction method, conduct numerical simulation though RFPA to acquire failure mechanism of slope4. According to the failure mechanism of slope in different research programs, base on the limit equilibrium method, conduct slope stability analysis though Geo-slope to acquire the safety factor, and raise the prevention countermeasures.