Mining and stripping cooperative method of determining deep open pit expansion stable production transition depth

Abstract

The invention provides a mining and stripping cooperative method of determining deep open pit expansion stable production transition depth, and belongs to the mining engineering open mining technology field. By introducing a mining and stripping positive and negative deviation variable, a mining and stripping cooperative relation in an open pit slope enlarging transition period is described by constructing a mathematical model. Compared with conventional deep open pit stage stable production transition, the mathematical model of the cooperative relation between the deep open pit bottom new level preparation and the upper part slope enlarging stripping is used to determine the reasonable depth of the deep open pit expansion stable production transition, and then references are provided for decision making of a deep open pit expansion transition production schedule and reasonable arrangement of a production scheduled plan in the transition period, reasonable configuration of production devices, and expansion financing, and in addition, the model and the solving method are suitable for being popularized and applied in mine enterprises and design organizations carrying out the stage mining of the large scale deep open pit slope enlarging transition.

Description

technical field [0001] The invention belongs to the technical field of mining engineering open-pit mining, and in particular relates to a mining and stripping cooperative method for determining the transition depth of expansion and stable production in deep concave open-pit mines. Background technique [0002] Most of the open-pit mines built in my country in the 1960s and 1970s were mined in stages; after decades of production and development, most of them have changed from hillside open-pit mining to deep concave open-pit mining. With the increase of mining depth, the mining conditions are getting worse The size of the stope operation is getting smaller and smaller, the difficulty of mining, transportation and preparation for a new level is increasing, and the production capacity of the mine is constantly declining; deep open-pit mines mined in stages must have a planned and reasonable arrangement for the transition of stages. Combine the mine production with far and near, c...

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Problems solved by technology

[0006] At present, in the transitional design of the expansion of Shenao open-pit mine, the method of determining the transitional depth and transitional time is usually compared with the scheme method, and the approximate method is used for approximate calculation. The algorithm is cumbersome, and the factors considered are relatively simple and cannot be well calculated Reflect the actual situation of the mine, although some manuals or literature mention that it can be solved by mathematical analysis, but there is no relevant literature for in-depth analysis

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