| Based on the analyzing and commenting on the researches of groundwater flow in fractured rock mass and waste dump , characteristic and numerical simulation for groundwater flow in slope fractured rock mass and waste dump of mine are studied, the main contents of this paper are showed as follows:(1)The fractures' characteristics , rock structures , hydro-geological boundary conditions and normal displace of fracture under unload stress are discussed and researched. The characteristics of groundwater flow in slope fractured rock mass of mine under stress are studied, the results show that simulation of groundwater flow under gravity and digging unload stress is beneficial to stability of mine rock slope, the influence on groundwater flow in slope fractured rock mass of mine is greater than that on groundwater flow in common slope fractured rock mass under same condition.(2)Based on the equivalent principle for the volume of flow and the theory of finite element method, the formula of equivalent hydraulic conductivity tensor based on single fracture for element is proposed, so the theoretic tool based on equivalent continuous model for discrete fracture netwok model and discrete- equivalent continuouse coupled model is provided. The drainage effect of artery fractures is simulated without mathematic difficutes of discrete- equivalent continuouse coupled model and flow exchange, the resalts are reasonable.(3) Based on the the formula of equivalent hydraulic conductivity tensor based on single fracture for element, the finite element method for stochastic characteristics of groundwater flow in fractured rock mass based on three-dimension stochastic fracture network is proposed. A case study shows that the results reflect the stochastic characteristics of groundwater flow in slope fractured rock mass of mine, without mathematic difficutes of discrete fracture netwok model.(4) Both the advantages and disadvantages of fuzzy clustering method and ISODATA fuzzy clustering method for fracture occurrences are analyzed, then combines the two fuzzy clustering methods into a synthetical fuzzy clustering method for fracture occurrences, the procedure and case of the synthetical fuzzy clustering method is proposed. The method and it's numerical inversion model for determining the hydraulic conductivity tensor of fractured rock mass and the equivalent hydraulic width of fracture are discussed, the procedure and case of their inversion by real number coding genetic algorithm is presented. Based on the determining of fracture data , the groundwaterflow characteristics in fractured rock mass of Zhujiabaobao iron mine south-slope under stress are analyzed, the influence of groundwater flow on stability of slope is discussed, the results show that a increasing on stability with influence of groundwater flow under digging unload stress.(5)The hydro-geological classificasion of mine waste dump and their infiltration supplement, run-off and drainage are analyzed. The groundwater flow characteristics of mine waste dump are discussed by analyzing the rainfall and groundwater flow drainage data of a waste dump, ideal conceptual model. According to the hydro-geological boundary conditions and rainfall convergence characteristics of mine waste dump, a general finite elemrnt method with rainfall convergence for saturated groundwater flow of waste dump is proposed. A case study shows a reasonable result Based on the general finite element method with rainfall convergence and nonlinear-seepage formula, a numerical model of groundwater flow in waste dump is established, a case results showed that nonlinear-seepage movement exists in all the seepage area of the waste dump. Therefore, the seepage modeling using nonlinear-seepage model is suitable and safe for mine waste dump.(6)The characteristics of composition structure, hydro-geological structure and settlement displace of mine waste dump are analyzed, a hydraulic parameter predictive method for unsaturated soil of mine waste dump under settlement displace is proposed, case study show a development of multi-layer saturated zone under rainfall with time, the decresing development of high water content zone under settlement displace and compaction of dumping equipment.
|
PDF Full Text Request