Abstract
The ore body has a great influence on the stability of surrounding rock and mining safety under different mining modes, and the reasonable selection of mining mode depends on other characteristics, such as ore structure surface feature, rock mass mechanical property, and ground stress distribution. Given the insufficient mining research data, this study establishes a 3D model by using the FLAC3D calculation program. Through numerical simulation and other technical means, a preliminary study on plastic and minimum stress changes during horizontal pillar mining, stress changes under different mining modes, and the effect comparison of full filling mining modes is conducted. Results show that the surrounding rock at the corner of pillar 1 is damaged, the plastic zone decreases, and the minimum stress in each working procedure increases slightly. The area of the plastic zone in alternate mining is smaller to that in continuous mining. This study provides a theoretical basis for ore body mining.
Highlights
In underground ore body mining, the mining method plays an important role in the stability of the stope structure and ground pressure control
Zuo et al [11],by studying the deformation and failure characteristics of rock under different mining conditions, the transition of brittleness and ductility of surrounding rock is closely related to the axial loading rate, which is related to the mining method of coal seam, and the more confining pressure Large, plastic features are more obvious
The present research selects the middle section of a mine in Jiangxi as the content and combines on-site monitoring, theoretical discussion, and numerical simulation to analyze the stability of the stope structure under different mining methods to provide reference for complex ore body mining
Summary
In underground ore body mining, the mining method plays an important role in the stability of the stope structure and ground pressure control. Zhao et al [8,9,10], used FLAC3D numerical simulation technology on the basis of the optimization of the mining scheme in Dajishan Tungsten Mine. They obtained the alternative and one mining schemes, which are further conducive to stope stability and can improve the stope production capacity. The present research selects the middle section (section 417) of a mine in Jiangxi as the content and combines on-site monitoring, theoretical discussion, and numerical simulation to analyze the stability of the stope structure under different mining methods to provide reference for complex ore body mining.
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