Study On The Design Theory And Method For Modern Surface Mining

The surface mining technology system is the main technique decision about open-pit mining design. The surface coal fields are complex in seat condition, what technology is selected for a surface mine has not a reliable and received theory rest on. In this thesis, I founded a surface coal fields classifying index system basis on coal field feature and mining condition by investigating and statistics and analyzing. Digital models of the classifying index are founded; the power coefficient calculating method is eatablished. The coal fields are classified with fuzzy get-together method. And the workable technology systems are matched for any one type coal field. It is founded that are the mining technology system compatibility's evaluating index system and the mining technology suitable for conditions model. We can evaluate a mining technology system via seting up attribution-degree calculating model about any one evaluating factor and the power coefficient. These provided theory basis for selecting the surface mining technology. The deposit models are founded in order to improve mine design quality and working efficiency, to deal fastly with abundant datum. In the thesis, I discussed the found methods of deposit model, estimating value methods, surface model and 3D model set method, reserves calculating, geology drawings plotting method. One improved distance power inverse ratio method of estimating value is put forward, this method think that the coal deposit is different character in every direction. And the model precise is raised. Economic reasonable striping ratio is the foundation to make sure the open pit limit and surface coal field bound. At present, it is confirmed by camparing underground mine cost. It dosn't include that are cost of underground mining accident, cost of the earth's surface sinking and the cost of environment treat of surface mining. This thesis put forward a new economic reasonable stripping ratio confirming method that involve above-mentioned costs, witch are calculated by cost model upbuilded with probability and statistics. For productioun stripping ratio is made certain, a new improved method of thinking coal quality and transportation distance is brought forward. At the same time, the stripping ratio control measours of new design open-pit and producted mine are put forward. Minging more coal with little overbueden under ensureing correspond overbueden and mining coal. This is beneficial for modern surface mining.