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Experimental Study on Confined Compaction Deformation of Crushed Gangue under Different Water Content Conditions

Liang, Pengfei ; Yang, Yu ; Liu, Jiashun ; Xin, Changhao ; Sun, Yidan

Applied sciences, 2023-04, Vol.13 (7), p.4538 [Periódico revisado por pares]

Basel: MDPI AG

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Título:
Experimental Study on Confined Compaction Deformation of Crushed Gangue under Different Water Content Conditions
Autor: Liang, Pengfei ; Yang, Yu ; Liu, Jiashun ; Xin, Changhao ; Sun, Yidan
Assuntos: Analysis ; Axial strain ; Axial stress ; Civil engineering ; Coal mining ; Compaction ; Compression ; confined compaction ; crushed gangue ; Crushing ; Deformation ; deformation law ; Environmental impact ; Fractals ; Gangue ; Laws, regulations and rules ; Mechanical properties ; Moisture content ; particle crushing ; Particle size ; Physical properties ; relative crushing rate ; Steel pipes ; Strain ; Testing equipment ; Water content
É parte de: Applied sciences, 2023-04, Vol.13 (7), p.4538
Descrição: To study the deformation characteristics of crushed gangue under different water content conditions, the confined compaction test of crushed gangue was carried out under five different water content conditions by using a universal material testing machine and a compaction device. The strain–stress relationship in the compaction process of crushed gangue and the crushing law of gangue particles were obtained through the test, and the effects of the axial stress, water content, and relative crushing rate on the compaction deformation of crushed gangue were analyzed. The results show that the confined compaction deformation process of crushed gangue can be divided into three stages: the rapid compaction stage, crushing compaction stage, and stable compaction stage. The strain–stress relationship can be described by the parameter logarithmic function and Chapman–Richards function, respectively. The maximum change in the compression modulus under different water content states ranged from 9.9 to 19.3 MPa, and the influence of the water content on the compression modulus was more significant with increasing axial stress. There is a good correlation between particle crushing and compaction deformation. The relative crushing rate increases with the increase in the axial strain, and the increasing rate of the relative crushing rate also gradually increases. The change law of the relative crushing rate and axial strain is different in dry and water-containing conditions.
Editor: Basel: MDPI AG
Idioma: Inglês

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Experimental Study on Confined Compaction Deformation of Crushed Gangue under Different Water Content Conditions

Liang, Pengfei ; Yang, Yu ; Liu, Jiashun ; Xin, Changhao ; Sun, Yidan

Basel: MDPI AG

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