Study on rock mechanical properties and the correlation of the mechanical parameters of Liuzuo Copper Mine

Cao, Hui; Xie, Lianku; Liu, Yi

doi:10.1201/b14917-37

Cited by 2 publications

(2 citation statements)

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“…Rock mechanics tests have always been the main means to understand the mechanical properties of rocks under different stress states, and also the main basis for establishing strength theory and intrinsic structure relations [1][2] . Due to the limitation of science and technology development level and experimental means, the fruitful research on the mechanical properties of rocks is only about half a century, and rock mechanics experiments are the basis for the study of rock mechanics theory and engineering technology, and the accuracy of test results determines the reliability of rock mechanics problem calculation and engineering design.…”

Section: Introductionmentioning

confidence: 99%

Study of triaxial compression test on mechanical parameters of coal rock

2023

AJAGE

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The stability problem of the coal seam roof and bottom slab has been an important issue for mine safety in the process of coal mine workings in the recovery process. To solve this problem, rock mechanics tests are needed to study the mechanical properties of coal seams and top and bottom plates. In this paper, triaxial compression tests were applied to the No. Coal-two seam and top and a bottom slab of Wangjiazhai coal mine, and the compressive strength, residual strength and cohesive force C, and internal friction angle of coal rocks under different circumferential pressure were measured. φ values. The test results show that the residual strength of the rock is higher than that of the coal sample and decays faster with the increase of strain, and the axial bearing limit of the coal rock is generally linear with the surrounding pressure, which generally conforms to Coulomb's strength criterion. The findings of the study are of great significance for the support design of the roadway and the study of other reinforcement mechanisms.

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Section: Introductionmentioning

confidence: 99%

Study of triaxial compression test on mechanical parameters of coal rock

2023

AJAGE

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“…By fitting experimental data on sandstone and those on mudstone, Cao et al (2010) obtained the relationship between the rock uniaxial compressive strength and the elasticity modulus [36]. Zhang et al (2011) established a correct empirical formula for the rock internal fraction angle (ϕ) and Poisson's ratio (µ) as follows [37]:…”

Section: Determination Of Rock Mechanical Parameters In the Research mentioning

confidence: 99%

Simulation of Ground Stress Field and Advanced Prediction of Gas Outburst Risks in the Non-Mining Area of Xinjing Mine, China

Wang

et al. 2018

Energies

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Abstract:In order to predict in advance the coal and gas outburst risks in the No. 3 coal seam in the non-mining area of the Xinjing mine, the strata were divided into seven rock assemblage types based on the lithologic characteristics of strata in the research area, and eight geological profile models were constructed. The finite element methods were used to simulate the ground stress field of the No. 3 seam floor. Based on the log curve, the coal structural type of the No. 3 coal seam was identified, with the thicknesses of the coal body under different types of damage being marked off in each borehole. A damage index of the coal structure (DV) was also proposed, and the DV indexes for all boreholes were calculated. The coal and gas outburst risks in the research area were comprehensively evaluated and predicted through a superposition analysis of the spatial distribution states of three indexes, namely: ground stress, coal structure damage degree, and coal seam gas content. The results show that the equivalent stress of the No. 3 coal seam floor is usually within the range of 9-26 MPa. The high-stress zone presents a strip distribution along the northeast-southwest (NE-SW) direction. The distribution of ground stress is mainly subject to the folds and buried depth of the coal seam. The distribution range where the damage degree of the coal structure falls under Types II and III is DV ≥ 22. The gas outburst risk in the mid-southern and northeastern parts of the research area is high, whereas that in the mid-western part is low. The zones with a high and low degrees of gas outburst risks are all mainly present as strips in the NE-SW direction. The gas outburst risk in the northwest and southeast is moderate. The research results can provide guidance for gas control in non-mining areas.

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Study on rock mechanical properties and the correlation of the mechanical parameters of Liuzuo Copper Mine

Cited by 2 publications

References 0 publications

Study of triaxial compression test on mechanical parameters of coal rock

Study of triaxial compression test on mechanical parameters of coal rock

Simulation of Ground Stress Field and Advanced Prediction of Gas Outburst Risks in the Non-Mining Area of Xinjing Mine, China

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