Novel method for searching large-range unstable fracture diastrophism surface of stope in complex environment

Abstract

The invention discloses a novel method for searching a large-range unstable fracture diastrophism surface of a stope in a complex environment. The method comprises: taking the maximum shear strain increment in numerical analysis as a criterion (combining a stress-displacement result), and searching the position of a series of maximum shear strain increment maximum value coordinates arranged in thesection in the vertical line direction before numerical calculation by compiling an FISH language program; obtaining discrete points of a fracture dislocation surface, performing linear fitting on coordinates of each discrete point by using an improved least square method to obtain a two-dimensional form and a position of the fracture dislocation surface, finally outputting and storing each coordinate of the form and the position of the fracture dislocation surface as a .TXT text format, and automatically obtaining a three-dimensional fracture dislocation surface form by using Sigmaplot drawing software. According to the method, the result obtained through the numerical analysis method is directly searched through programming, the convergence speed or premature problem is not involved, the obtained result is high in precision, the final fracture dislocation surface is in a three-dimensional form, and a theoretical basis can be provided for later stope grouting reinforcement and stopemining.

Description

technical field [0001] The invention relates to a new search method for a large-scale unstable fracture dislocation surface in a stope under a complex environment. Background technique [0002] In order to meet the dependence of my country's economic construction on mineral resources, the mining of mineral resources must not only extend to the deep, but also fully recover the unexploited resources left over from the mining process, especially due to unreasonable design (mining by filling method). For high-grade ore caused by stable collapse, the surrounding rock stability of this type of stope is often very poor, and the environment in which it is located is very complicated, and it affects the stope mining of an area, which poses a problem for the safety of mining. new requirements. For the mining of such mineral resources, the mechanism of instability and collapse caused by previous mining should be analyzed first, and one of the most critical steps is to determine the frac...

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Problems solved by technology

[0005] In order to solve the traditional search algorithm related to the problems of convergence speed and premature maturity, and the applicability of the determination of the instability, collapse, fracture and dislocation surface of underground mines under complex environmental conditions is not strong, and the calculation accuracy is also poor technical problems, this paper The invention provides a new search method for the large-scale unstable fracture dislocation surface in the stope under the complex environment

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