Use of the burnt rock of coal deposits slag heaps in the concrete products manufacturing

Kuz'min, M.P.; Larionov, L. M.; Kondratiev, V. V.; Kuz’mina, Marina Yu.; Grigoriev, Vyacheslav; Kuz’mina, A.S.

doi:10.1016/j.conbuildmat.2018.05.222

Cited by 22 publications

(12 citation statements)

References 29 publications

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“…e mining stress and original rock stress superimpose on the coal seam and roof rock, which is similar to a cyclic loading condition. Coal mine disasters are mostly generated by the overall structure of coal seam and roof [59][60][61][62][63][64][65][66][67][68][69][70]. Many coal mine disasters demonstrate that roof-and-floor rock has a loading effect on the failure of the coal seam.…”

Section: Discussionmentioning

confidence: 99%

Study on Failure Modes and Energy Evolution of Coal-Rock Combination under Cyclic Loading

Song

Liu

Tan

et al. 2020

Shock and Vibration

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The loading modes and roof lithology have a significant influence on the mechanical properties of coal seams. To reveal the failure modes and energy evolution law of underground coal during the mining process, conventional uniaxial and uniaxial cyclic loading tests were carried out on three types of samples: coal, rock, and coal-rock combinations. The results show that the samples mainly behave with three failure modes (shear slip, tensile splitting, and fracture), and all the coal sections in the coal-rock combinations fail, whereas most rock sections remain intact. The compressive strength of the coal-rock combination is higher than coal and much smaller than rock. Compared with the conventional uniaxial loading condition, both the maximum deformation before failure and Young’s modulus under the cyclic loading condition are greater, and the latter increases quadratically with the cycle index. The energy densities are also calculated, and their variations are analysed in detail. The results show that with increasing cycle index, both the elastic energy stored in the sample and the dissipated energy increase in a quadratic function, and the failure process becomes more intense. This research reveals the failure modes, deformation characteristics, and energy evolution of the coal-rock combination under different loading conditions, which can provide strong support for controlling underground surrounding rocks of the coal face and roadway in coalmines.

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Section: Discussionmentioning

confidence: 99%

Study on Failure Modes and Energy Evolution of Coal-Rock Combination under Cyclic Loading

Song

Liu

Tan

et al. 2020

Shock and Vibration

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“…The rock as residue powder which results from various mechanical processes during machining and many operations is seriously affecting the environment significantly. The rock waste is mostly causing polluting even though only some part of it is correctly discarded, but major quantity of waste is dumped in an improper way violating the rule of pollution control board [2][3][4]. While processing and machining 70%-75% is possible to obtain as rock stone, the rest are rock wastes of 20%-25% [5,6].…”

Section: Introductionmentioning

confidence: 99%

Ceramic bodies with rock processing residues (RPR) for constructing materials

Vijayaragavan¹,

Mullainathan

Nithiyanantham

2020

Waste Dispos. Sustain. Energy

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The rock processing residue (RPR) waste is used for part of the ceramic products. The present work deals with the unused waste useful for making ceramic materials and save the area and the dump space. The residues are initially analyzed with the chemical and spectroscopic method. The residues are mixed with clay of proportions 0-50 wt% in steps of 10%. The prepared specimens are characterized with Fourier transform infrared (FTIR), X ray fluorescence (XRF) for chemical, mechanical, and physiochemical properties, such as density, compressive strength, weight loss on ignition and porous nature, which are measured through the selective instrument. The thermal stability of the product was tested by firing at 950 °C. This says the rock residues are useful for making ceramic and related materials with high concentrations.

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“…Rock materials, as a common construction element due to excellent mechanical properties and convenient in situ collection, have been extensively applied in many underground engineering applications, such as hydropower station, oil gas storage, deep-lying tunnel, and underground goaf [1][2][3][4][5]. During the construction and operation process, due to high in situ stress, weak structural planes, and other uncontrollable geological conditions, many underground rock structures subjected to external disturbance often suffer from rock burst, spalling, high-stress collapse, and larger deformation [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Damage Evolution and Failure Behavior of Post-Mainshock Damaged Rocks under Aftershock Effects

et al. 2019

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Rock stability has long been a hot topic during underground energy exploitation, but the failure process of rock materials under earthquake effects is extremely complicated, and the failure mechanism still remains unclear. In order to investigate the fatigue damage and failure behavior of rocks under aftershock effects considering the post-mainshock damage states, a series of laboratory tests were conducted on marble specimens subjected to stepwise cyclic loading. Four levels of peak stress (i.e., 10, 30, 50, and 70 MPa) were applied in the first cycle, to simulate mainshock damage.The results indicate that, with the increase of initial cycle amplitude, mainshock damage has a significant effect on deformation behavior, dissipated energy, P-wave velocity, and AE characteristics of tested specimens during aftershock process. The increasing amplitude of initial cycle enhances irreversible deformation and weakens the resistance to deformation, which accelerates the expansion of specimen volume and results in the reduction of bearing capacity. Furthermore, the increasing amplitude of initial cycle obviously changes the failure morphologies and intensifies the final macro-fracture scale of tested specimens, which are verified by acoustic emission AF-RA value and b-value, respectively.

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Use of the burnt rock of coal deposits slag heaps in the concrete products manufacturing

Cited by 22 publications

References 29 publications

Study on Failure Modes and Energy Evolution of Coal-Rock Combination under Cyclic Loading

Study on Failure Modes and Energy Evolution of Coal-Rock Combination under Cyclic Loading

Ceramic bodies with rock processing residues (RPR) for constructing materials

Damage Evolution and Failure Behavior of Post-Mainshock Damaged Rocks under Aftershock Effects

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