To exploit this amount of ore,the design of mining zone ambit is optimized thus the utilization rate of mineral resource is increased,the service life of mine is prolonged and remarkable economic benefit is achieved.

Deep mining boundary optimization of Yingpanshan stope of Lanjian Iron Ore Mine;

The mining boundary integral decision at the west Lanshan Mine is taken as an engineering example to introduce the procedures and methods for providing qualitative and quantitative indices for the five subordinate mining boundary decision objectives by establishing the deposit geological model, rock and earth work model, mining process model and economic appraisal model.

on the basis of a brief analysis and evaluation of the existing method for determining the open pit mining limit, this paper points out the limitation of the existing method based on static economic analysis, and puts forward a new method based on dynamic ecomomic analysis for determinig the open pit mining limit.

Aiming at multi-projects of open pit mining limits obtained by parameter-function method,using margin benefit to determine the rational mining limit,it succeed in obtaining the best design of open pit limit,which is obtained from the counting result of parameter-function method.

Discussion and application of boundary stripping ratio in open-pit;