Abstract
Rock mechanics test is not only the basis for obtaining the mechanical parameters of rock but also an important means for studying rock mechanics and engineering. In this paper, the uniaxial compression deformation test, Brazilian splitting test, and cornea pressure shear test are carried out for rocks in the Dajishan tungsten mine. The basic mechanical parameters such as uniaxial compressive strength, tensile strength, elastic modulus, Poisson’s ratio, and internal friction angle of ore rock and surrounding rock are obtained. Meanwhile, damage characteristics of rock are deeply studied and analyzed under different experimental conditions. According to rock mechanics parameters which are obtained from indoor rock mechanics tests, three design schemes of stope structure parameters are optimized by using the FLAC3D numerical simulation software. On the premise of ensuring the stability of the stope structure, the recovery rate of ore and the production capacity of the stope are taken into consideration. It is suggested that the second scheme should be adopted for mines (18 m for ore room and 7 m for ore pillar), which provides scientific guidance for the safe and efficient mining of mines.
Highlights
As the main body of underground engineering, the evaluation of the stability of underground structures is based on the stability analysis of engineering rock mass
On the study of rock mechanics properties, domestic and foreign scholars have carried out a large amount of scientific research and achieved fruitful results
The current high technology electronic computing and theoretical analysis have reached a high level, the rock mechanics test is still irreplaceable as a direct solution to the mechanical problems in practical engineering [7]
Summary
As the main body of underground engineering, the evaluation of the stability of underground structures is based on the stability analysis of engineering rock mass. In order to comprehensively evaluate the rock mass quality and surrounding rock stability of the mine and provide reliable basic data for the design and optimization of the subsequent deep mining plan of the mine, in this paper, the basic mechanical parameters and failure characteristics of ore rock and surrounding rock are obtained according to the uniaxial compression test, Brazilian splitting test, and cornea compression shear test. On this basis, three different stope structural parameters are compared and studied to provide reference for mine safety and efficient mining
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