The fire extinguishing performances of foamed gel in coal mine

Zhang, Leilin; Qin, Botao; Shi, Biming; Wu, Qing; Wang, Juan

doi:10.1007/s11069-016-2168-5

Cited by 26 publications

(10 citation statements)

References 34 publications

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“…In general, the oxidative exothermic of coal in low temperature stage is the direct cause of spontaneous combustion of coal[24–26]. In previous studies, the control of spontaneous combustion in mine goaf includes two parts: inhibit low temperature oxidation of coal[27–29] and extinguish high temperature combustion of coal[30–33]. Thus, the experiment of inhibiting low temperature oxidation of coal by NIWM and extinguishing high temperature combustion of coal by NIWM were carried out, respectively.…”

Section: Experimental Research On Niwm Fire Prevention and Extinguishingmentioning

confidence: 99%

Research on N2-inhibitor-water mist fire prevention and extinguishing technology and equipment in coal mine goaf

Liu

Wang

2019

PLoS ONE

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In this study, a new type of N 2 -inhibitor-water mist (NIWM) technology was proposed to resolve the problem of fire prevention and extinguishing in the goaf of coal mine. The corresponding equipment was designed and manufactured. Under the condition that both gas pressure and liquid pressure were 0.5–2MPa, the NIWM equipment produced the water mist with Sauter mean diameter (SMD) range of 166–265μm. The experimental results of the operating parameters of NIWM equipment were in agreement with the theoretical derivation. The theory of two-phase flow atomisation can be used as theoretical guide for this technology. After that, on the basis of the NIWM equipment, the experiments of inhibiting low temperature (30–100°C) oxidation and extinguishing high temperature combustion of large dosage of coal sample were carried out. Water mist with SMD = 188μm had good diffusivity in the container. The inhibiting effect of N 2 -inhibitor-water mist on low temperature oxidation of coal was obviously greater than that of single material. N 2 -water mist extinguished the burning coal completely in 20 minutes. The addition of water mist solved the shortcoming of poor cooling effect of N 2 . In different stages of coal-oxygen reaction, N 2 , inhibitor and water mist play very different role in controlling the process of coal-oxygen reaction, which was not simple accumulation of the three. The combination of N 2 , inhibitor and water mist should be determined according to the state of the coal mine goaf fire. On the basis of the research conclusions, the onsite arrangement diagram of the NIWM fire prevention and extinguishing equipment in the goaf was designed. The research results proved the feasibility and effectiveness of this technology, and it is of great significance to the prevention and control of coal spontaneous combustion in goaf.

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Section: Experimental Research On Niwm Fire Prevention and Extinguishingmentioning

confidence: 99%

Research on N2-inhibitor-water mist fire prevention and extinguishing technology and equipment in coal mine goaf

Liu

Wang

2019

PLoS ONE

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“…Subsequently, at this concentration, the effects of the foaming ratio, addition of salts (NaCl, CaCl 2 and AlCl 3 ), pH value and temperature on the rheological properties of the foam gel were discussed [60]. The fire extinguishing time of thickening agent and crosslinking agent mixture at different concentrations was also examined [61].…”

Section: Polymer-containing Soft Matters For Coal Mine Disaster/hamentioning

confidence: 99%

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Wang

et al. 2019

Polymers

Self Cite

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Safe mining is the premise and guarantee of sustainable development of coal energy. Due to the combination of excellent properties of polymers and traditional soft matters, polymer-containing soft matters are playing an increasingly important role in mine disaster and hazard control. To summarize the valuable work in recent years and provide reference and inspiration for researchers in this field, this paper reviewed the recent research progress in polymer-containing soft matters with respect to mine dust control, mine fire control, mine gas control and mine roadway support. From the perspective role of polymers in a material system, we classify mine polymer-containing soft matters into two categories. The first is polymer additive materials, in which polymers are used as additives to modify fluid-like soft matters, such as dust-reducing agents (surfactant solution) and dust-suppressing foams. The second is polymer-based materials, in which polymers are used as a main component to form high performance solid-like soft matters, such as fire prevention gels, foam gels, gas hole sealing material and resin anchorage agent. The preparation principle, properties and application of these soft matters are comprehensively reviewed. Furthermore, future research directions are also suggested.

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“…Fire extinguishing experiments revealed that the intelligent gel could cover the surface of burning coal, thereby significantly reducing the ignition source temperature, thermal radiation, and amount of CO generated. Zhang et al 14 prepared a gel made up of thickener, cross-linker, foaming agent, water, and nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Carrageenan‐vermiculite‐dimethyl methyl phosphate ternary hybrid hydrogels for firefighting

et al. 2022

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An eco-friendly and bio-based ternary hybrid hydrogel consisting of carrageenan, vermiculite, and dimethyl methyl phosphate (DMMP) was prepared through a facile one-pot method. Rheological tests showed that this ternary hybrid hydrogel was a power-law fluid. The formulation of the ternary hybrid hydrogel was also screened, and the optimal formulation was found to be the ternary hybrid hydrogel containing 1 wt% carrageenan, 2 wt% DMMP, and 4 wt% vermiculite. Firefighting experiments showed that the ternary hybrid hydrogel could stop the chain reaction and rapidly reduce the temperature of combustion. Compared to water, the extinguishing time of the ternary hybrid hydrogel was shortened by 46.6%, and the volume consumed was reduced by 43.3%. The superior fire extinguishing efficiency of the ternary hybrid hydrogel could be attributed to the combined effect of each component: carrageenan provides viscosity, making the hydrogel firmly cover the burning surface; DMMP works as a free radical scavenger that can stop chain reactions; and vermiculite acts as a barrier layer, which helps to insulate air and heat and prevent resurgence. This work provides an environmentally-friendly, cost-effective, and bio-based hybrid hydrogel for firefighting.

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The fire extinguishing performances of foamed gel in coal mine

Cited by 26 publications

References 34 publications

Research on N2-inhibitor-water mist fire prevention and extinguishing technology and equipment in coal mine goaf

Research on N2-inhibitor-water mist fire prevention and extinguishing technology and equipment in coal mine goaf

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Carrageenan‐vermiculite‐dimethyl methyl phosphate ternary hybrid hydrogels for firefighting

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