Study On Design Theory Of Mining Technology System And It's Application Based On Surface Miner

In light of the principle of surface mining, theory of reliability and method of multi-objective decision, this dissertation reports an intensive research into the system of surface miner in terms of investigation, theoretical analysis and engineering practice. The findings of this research work are as follows:(1)The dissertation made a comprehensive analysis of the characteristics of surface miner system, based on an overview of the application factors in China from various aspects, such as resources, economy, environment, management and other aspects. Taking into account the geological conditions of the open pits in our country, we find the occurrence of resources and reliability of technology system as decisive factors.(2)The dissertation gives a systematic analysis of mining methods and operating parameters of process, offering a qualitative evaluation of the applicable conditions in different mining methods, and reasonable value range of work lines for surface miner- truck mining technology.(3)The dissertation set up an optimization model of surface miner selection based on multi-objective decision and fuzzy mathematics. It defined the basic concept of following time, a key parameter for truck to surface miner matching. The calculation method of match type of the technology with trucks is given by application of system efficiency. The actual capacity of front loader has a linear relationship with the layer's thickness mined by surface miner.(4)The dissertation established the calculation model of coal loss and gangue entraining, on condition that the fixed type of surface miner is working. It gave a formula of refuse rate and the calorific value of gross coal. The formula showed that there was a negative correlation between the effect of mining and the rock parting's layer number and thickness. A principle to determine the thickness of mining and dressing is set up based on the analysis of the influencing factors of mining thickness.(5)The dissertation analyzed the surface mine's failure mode based on its own features, studied the reliability of surface miner and it's process based on repairable series system model. It analyzed the multi-layer, hardness and in cold regions'adaptable with coal and parting.