Research on the Control Process of Mining and Combustion Disturbance Zone Based on the Three-Dimensional Dynamic Distribution Model of Void Fraction

Cao, Naifu; Liang, Yuntao

doi:10.1080/00102202.2022.2158733

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…In colloidal fire-fighting materials, with the help of drilling technology, the colloidal transport to the designated position after gelling, the surface of the coal is covered by colloidal, plays a role in oxygen blocking and cooling [7,27,28]. Colloidal materials used to inhibit coal spontaneous combustion include gels, corrosion retarding gels, aggregate suspension colloids, and inorganic mineral colloids [29].…”

Section: Colloid Materialsmentioning

confidence: 99%

Exploration and Frontier of Coal Spontaneous Combustion Fire Prevention Materials

Han,

Niu,

Zhu

et al. 2024

Processes

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Mine fires have always been one of the disasters that restrict coal mining in China and endanger the life safety of underground workers. The research and development of new fire prevention materials are undoubtedly important to ensure the safe and efficient production of modern mines. At present, the main inhibiting materials used are grout material, inert gas, retarding agent, foam, gel, and so on. In order to explore the current situation of coal spontaneous combustion (CSC) fire prevention, the existing fire prevention materials were reviewed and prospected from three aspects: physical, chemical, and physicochemical inhibition. The results show that, at present, most of the methods of physicochemical inhibition are used to inhibit CSC. Antioxidants have become popular chemical inhibitors in recent years. In terms of physical inhibition, emerging biomass-based green materials, including foams, gels, and gel foams, are used to inhibit CSC. In addition, CSC fire-fighting materials also have shortcomings, including incomplete research on the mechanism of material action, poor stability of inhibitory properties, low efficiency, and economic and environmental protection to be improved. The future research direction of fire-fighting materials will be based on theoretical experiments and numerical simulation to study the mechanism and characteristics of CSC and develop new directional suppression materials with physicochemical synergies. These findings have extremely important implications for improving materials designed to prevent CSC.

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Section: Colloid Materialsmentioning

confidence: 99%

Exploration and Frontier of Coal Spontaneous Combustion Fire Prevention Materials

Han,

Niu,

Zhu

et al. 2024

Processes

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“…However, the large volume of gangue and the relatively low comprehensive utilization rate [8][9][10], as well as the high cost and limitations of traditional backfilling mining techniques, such as the mutual influence of mining and backfilling processes and the impact of backfilling on working face productivity [11][12][13], make existing gangue utilization methods and approaches inadequate for efficient, green, and large-scale disposal of coal gangue. Based on this, some scholars have integrated the advantages and disadvantages of traditional solid backfilling, paste backfilling, and high-water backfilling techniques [14][15][16]. They proposed a new type of coal gangue slurry backfilling technology by combining caving zone grouting technology, long-distance pipeline transportation technology, and yellow mud grouting technology [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Research and engineering practice on space characteristics of gangue slurry filling

Gu,

Yang,

Pan

et al. 2023

Preprint

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The macroscopic characteristics of the fractured space and the microscopic pore features are critical factors determining the effectiveness of gangue slurry backfilling. To identify the key areas for slurry backfilling, a combination of theoretical analysis, simulation experiments, and on-site industrial trials was used to reveal the movement laws of backfilling space overlying the fractured zone. The distribution characteristics of voids available for slurry backfilling within the fractured space were explored, and the interaction between gangue slurry and goaf voids was clarified. A formula for calculating the void ratio in the caved zone was derived, and a model for the distribution of voids in the slurry backfilling space was established. This model identified the main areas where slurry backfilling should be focused, namely the overlapping space between the free accumulation zone and the load-influenced zone. Experimental results demonstrated that the porosity of the collapsed rock mass within the goaf follows a negative logarithmic function along both the dip and strike directions, which was consistent with the theoretical calculations. Through in-situ grouting backfilling experiments on the ground, the feasibility of gangue slurry backfilling in the goaf was verified, and the process of interaction between gangue slurry and goaf voids was elaborated. This process generally involves three stages: initial flow, vertical upwelling, and horizontal diffusion, all of which are closely interconnected. Practical engineering applications of gangue slurry backfilling were carried out in the free accumulation zone and the load-influenced zone at the Huangling No.2 coal mine. The successful validation of underground gangue slurry backfilling technology demonstrated its feasibility and the correctness of the theoretical approach. This research provides new evidence for environmentally friendly disposal of gangue materials.

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Research and engineering practice on space characteristics of gangue slurry filling

Gu,

Yang,

Pan

et al. 2023

Sci Rep

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The macroscopic characteristics of the fractured space and the microscopic pore features are critical factors determining the effectiveness of gangue slurry backfilling. To identify the key areas for slurry backfilling, a combination of theoretical analysis, simulation experiments, and on-site industrial trials was used to reveal the movement laws of backfilling space overlying the fractured zone. The distribution characteristics of voids available for slurry backfilling within the fractured space were explored, and the interaction between gangue slurry and goaf voids was clarified. A formula for calculating the void ratio in the caved zone was derived, and a model for the distribution of voids in the slurry backfilling space was established. This model identified the main areas where slurry backfilling should be focused, namely the overlapping space between the free accumulation zone and the load-influenced zone. Experimental results demonstrated that the porosity of the collapsed rock mass within the goaf follows a negative logarithmic function along both the dip and strike directions, which was consistent with the theoretical calculations. Through in-situ grouting backfilling experiments on the ground, the feasibility of gangue slurry backfilling in the goaf was verified, and the process of interaction between gangue slurry and goaf voids was elaborated. This process generally involves three stages: initial flow, vertical upwelling, and horizontal diffusion, all of which are closely interconnected. Practical engineering applications of gangue slurry backfilling were carried out in the free accumulation zone and the load-influenced zone at the Huangling No. 2 coal mine. The successful validation of underground gangue slurry backfilling technology demonstrated its feasibility and the correctness of the theoretical approach. This research provides new evidence for environmentally friendly disposal of gangue materials.

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Research on the Control Process of Mining and Combustion Disturbance Zone Based on the Three-Dimensional Dynamic Distribution Model of Void Fraction

Cited by 4 publications

References 18 publications

Exploration and Frontier of Coal Spontaneous Combustion Fire Prevention Materials

Exploration and Frontier of Coal Spontaneous Combustion Fire Prevention Materials

Research and engineering practice on space characteristics of gangue slurry filling

Research and engineering practice on space characteristics of gangue slurry filling

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