Content and gradation of aggregates effect on compaction property of gangue backfill and strata movement: experiments and models

Wang, Y.; Wu, Jiangyu; Chen, Z.

doi:10.1007/s13762-021-03850-w

Cited by 5 publications

(1 citation statement)

References 47 publications

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“…10, the damage curves of uniaxial compressive damage of CACFB of R-C-1, R-C-2, R-C-3 and R-C-4 are all presenting the stages of compression-tight stage, destruction and post-destruction. It can be seen from the curves: at the beginning stage, the load increases slowly, the load displacement curve is nearly hyperbolic, and the specimen is in the linear elasticity stage; after a period of time, the load increases faster, the load is in the linear elasticity stage, and the load displacement curve presents a straight line; then the curve shows an up-convex shape to increase to the peak, and the specimen damage intensi es, and it is in the non-linear elasticity stage; the curve begins to decrease from the peak, and the damage of specimen continues to expand, which ultimately leads to the complete breakage [33,34].…”

Section: Stress-strain Curve Of the Cacfbmentioning

confidence: 99%

Experimental investigation into the mechanical and microscopic properties of cemented aeolian sand-coal gangue-fly ash backfill

Zheng,

yang,

Yang

et al. 2024

Preprint

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This paper investigates that the influence of the independent variables of particle size of coal gangue (CG), concentration and coal gangue content on the UCS of cemented aeolian sand (AS)-coal gangue-fly ash (FA) backfill (CACFB) mixtures through the thermogravimetric, piezomercurial, microscopic experimental means by adding certain particle size of coal gangue particles in the cemented aeolian sand -fly ash backfill (CAFB) mixtures. Through the relevant experiments, the following conclusions are drawn: 1. with the increasing particle size of CG particles, the UCS of the CACFB is increasing in which the 7d UCS of R-C-1, R-C-2, R-C-3 and R-C-4 were 2.05 MPa, 2.11 MPa, 1.94 MPa and 2.09 MPa, respectively; 2. After 7 days of curing age, the UCS of CACFB is generally 1.5 MPa higher than that of CAFB.; 3. Because CG particles play a role in increasing slurry concentration, compactness and improving particle gradation in CACFB, the UCS of CACFB is much higher than the UCS of CAFB.; 4. The improvement UCS of CACFB will greatly improve the popularization and application of filling mining in northern Shaanxi mining area, and reduce the damage to environmental water resources and land resources in the mining area.

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Section: Stress-strain Curve Of the Cacfbmentioning

confidence: 99%