Ore rock joint structure simulation method based on native crustal stress field

Abstract

The invention belongs to the technical field of mine geology, and particularly relates to an ore rock joint structure simulation method based on a native crustal stress field. The method is characterized by comprising the steps of (1) investigating a field joint structure; (2) establishing a three-dimensional model; and (3) carrying out ground stress structure inversion numerical simulation. According to the method, the ore rock stress environment during mineralization is restored by utilizing mechanical software; a rock mass model is established in software; stress in different directions andmagnitudes is applied; when the joint fissure development condition matches the existing data, the mechanical environment is considered to be close to the stress condition in the metallogenic period;the stress condition is loaded to other position areas; the joint structure condition of an unknown area is obtained through inversion according to the method, and therefore a large amount of reliable structure data is obtained, and the collapsibility evaluation accuracy can be effectively improved; a large amount of simulation data can be obtained through limited data; and the problems that joint structure field investigation is high in cost, large in difficulty and long in period are thoroughly solved.

Description

technical field [0001] The invention belongs to the technical field of mine geology, and in particular relates to a simulation method of ore-rock joint structure based on an original in-situ stress field. Background technique [0002] Natural caving mining is a safe and efficient mining method that can achieve large-scale continuous mining. This mining method is mainly suitable for the mining of thick ore bodies with relatively developed joints and fissures and steep dip angles. At present, there are more than 50 mines using natural caving mining in the world, mainly distributed in the United States, Australia, Canada, Chile, South Africa, China and other countries. The domestic application mines mainly include Tongkuangyu Copper Mine and Pulang Copper Mine. The evaluation of the caving ability of ore rocks is an important content in the mining design and research of natural caving method. The mining sequence, bottom drawing direction, bottom drawing area, ore extraction met...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for simulating the joint structure of ore rocks based on the original in-situ stress field. This method is suitable for the caving evaluation of ore rocks when mining by natural caving method, and mainly solves the problem of insufficient engineering geological data on site. Using this method, more relevant data can be obtained

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