the compaction properties of crushed gangue backfill materials (CGBM) with different particle sizes were tested by using the YAS5000 testing machine and a self-made compacting device. Moreover, based on the strain hard-ening behaviour of CGBM in the process of compaction, a method of simulating CGBM using double-yield model was put …
In solid backfilling coal mining (SBCM), the deformation resistance of crushed gangue particle material (CGPM) is critical for controlling overburden strata movement and ground surface subsidence. In engineering practice, CGPM is generally circularly compacted first by the compaction machine to reduce its compressibility.
To analyse the influences of particle size of backfill materials on surface subsidence, the compaction properties of crushed gangue backfill materials (CGBM) with different particle sizes were tested by using the YAS5000 testing machine and a self-made compacting device. Moreover, based on the strain hardening behaviour of CGBM in the …
A rock mechanic testing machine and a self-designed steel cylinder were applied to conduct compaction experiments of gangue with different particle sizes, axial stresses, lo... Cite Download full-text
Crushed gangue, an inhomogeneous and discontinuous medium, is accompanied with the absorption and dissipation of energy under compression. In order to study the compressive deformation and energy ...
In order to find the influence factors on coal and gangue separation, the article put forward an optimization design based on a support vector machine (SVM) and orthogonal experimental method. The crushing rates of coal and gangue were chosen as investigation target, and a comprehensive analysis was made for the coal gangue …
The coal gangue vertical compound crusher can achieve more crushing and less grinding and is an ideal fine crushing equipment for energy saving and consumption reduction.
The compaction and re-crushing characteristics of crushed gangue are important factors which affect the quality and effectiveness of the filling of the quarry. To study the compaction and re-crushing characteristics of the gangue particles, continuous grading and intermittent grading of two different structures were designed to study the …
In solid backfilling coal mining (SBCM), the crushed gangue backfilling material (CGBM) is generally compacted circularly by a …
J Li et al. [19] extracted the real shape of crushed gangue by CT scanning and analyzed the effect of particle gradation and shape on the natural accumulation voidage based on DEM; the results ...
The coal gangue was taken from Xin'an Coal Mine in Luoyang, Henan Province. The lithology of the gangue was sandstone, and the average density of the gangue was 1.369 × 10 3 kg/m 3, with an average uniaxial compressive strength of 38.03 MPa.To reduce the impact of boundary effects on the results (He et al., 2022), the larger gangue particles …
The crushed particle size came from the complete caved zone gangue in the longwall goaf of a mine. The maximum thickness of the caved zone was about 20 m, and the
The crushed coal gangue particles are widely used in solid backfilling. However, the non-uniform compaction and internal re-crushing behavior of crushed coal gangue under bearing-stress have not ...
This study utilizes crushed gangue from the Gangue Yard in Fuxin City as the research material. ... The axial load system uses a computer-controlled electro-hydraulic servo compression testing ...
We conducted the gangue compression loading test using a WAW-2000 electro-hydraulic servo universal testing machine, also shown in Fig ... Zhang YC (2019a) Characterizations of macroscopic deformation and particle crushing of crushed gangue particle material under cyclic loading: in solid backfilling coal mining. Powder Technol …
Roll crusher has a wide range applications, especially for coal gangue crushing. The post will introduce how and why use roll crushers to crusher coal gangue.
Crushed stone machines play a critical role in the construction industry by crushing large rocks into smaller, more manageable pieces that can be used in a variety of building projects. In this comprehensive guide, we explore the different types of crushed stone machines, their components, and how to operate them safely and efficiently. We …
In solid backfilling coal mining (SBCM), the deformation resistance of crushed gangue particle material (CGPM) is critical for controlling overburden strata …
The explosion scene in gob was simplified and the position of the crushed gangue from the ignition source was set to 0.5 m, the actual setup is shown in Fig. 3.The gangue used in the experiments ...
PFL vertical compound crusher: used for fine crushing and sand making of coal gangue. This equipment has the crushing mechanism of impact and grinding, which …
Request PDF | On May 1, 2024, Yao Lu and others published Influences of water filling timing on the deformation mechanism of crushed gangue in goaf | Find, read and cite all the research you need ...
An equation for predicting stress-strain relationship during compression-induced deformation of gangue backfill materials under multi-factor coupling effects was established and shows that this equation can predict compression- induced deformation in goaf, beneficial to providing a basis for predicting strata movement and surface …
Specifically: the coal gangue is crushed by a multi-stage crusher and enters the screening machine for screening, the finished particle aggregate under the screen is transferred to the finished ...
Using a crushed rock compaction permeation apparatus and a self-designed seepage circuit, we tested the permeability of crushed gangues with six different particle sizes during compaction on the CMT5305 electronic universal testing machine and analyzed the relationships of seepage velocity, permeability and non …
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 ...
In the current research, a large number of studies have been carried out on the compressive macroscopic deformation characteristics of crushed gangue, and its …
Crushed gangue, an inhomogeneous and discontinuous medium, is accompanied with the absorption and dissipation of energy under compression. In order to study the compressive deformation and energy dissipation of gangue in the loading process under conditions of different particle sizes, loading rates, and first-time stress …
In order to improve the utilization rate of coal gangue as aggregate in concrete, based on the orthogonal experimental design method, the L16 ... The materials tested in this paper are coal gangue, coal gangue sand, natural crushed stone, water-washed machine-made sand, cement, water reducing agent and tap water. 1.
Details such as "using an SANS testing machine and steel cylinder" or "steel chamber and 64 a SANS material testing machine" seem to be unnecessary. ... Peng, Sen Han, Wenbing Guo, Weiqiang Yang, and Erhu Bai. 2024. "Study of the Internal Rebreaking Characteristics of Crushed Gangue in Mine Goaf during Compression" …
The crushed gangue materials which are filled into the goaf in solid-backfilling coal mining become the main body of bearing the overburden after the tamping process. ... coal mining (SBCM), the crushed gangue backfilling material (CGBM) is generally compacted circularly by a compaction machine in order to reduce its compressibility. In this ...
Analyzes the effect that different crushers machine crushing gangue. Coal Gangue Meaning. Coal Gangue is a kind of solid waste discharged from coal mining and coal washing. It is also a kind of black-gray rock with lower carbon content and harder than coal. ... The crushed coal gangue which crushes by impact crusher, the small and big size is ...
Mineral processing, art of treating crude ores and mineral products in order to separate the valuable minerals from the waste rock, or gangue. It is the first process that most ores undergo after mining in order to provide a more concentrated material for the procedures of extractive metallurgy.
The permeability of crushed gangues was tested in triplicates and the average was used for analysis. In brief, a certain amount (m) of crushed gangues were packed into the cylinder of inner diameter of 2a (2a = 68) mm and height of 110 mm and connected to the electronic universal testing machine.Its height (h o) under natural …
