PDF
Full
Outline
In order to prevent high-level fire hazards such as spontaneous combustion of top coal and upper layer residual coal，a self-produced gas expansion slurry was prepared by taking industrial solid waste phosphogypsum as the base material，adding components such as sodium bicarbonate and polyacrylamide. Firstly，a thermogravimetry(TG) analyzer was used to study the thermal stability of the slurry at different heating rates. Then，a self-built insulation performance testing system was used to test the thermal insulation performance of the slurry. Finally，the fire extinguishing and cooling performance of the slurry was studied through fire extinguishing experiments. The results show that when the temperature of phosphogypsum based self-produced gas expansion slurry is below 160 ℃，there is a mass loss of 35% to 46% in the slurry. When the temperature is above 160 ℃，the mass fraction of the slurry no longer changes. The thickness of the slurry accumulation reaches 30 mm，and the effective insulation time exceeds 139 min，which can achieve good coverage of coal spontaneous combustion hazardous areas. The slurry expands and diffuses in the cracks of the coal pile，completely enveloping the broken coal from bottom to top，isolating oxygen，and having good cooling and fire extinguishing performance. After 36 min of grouting，the temperature at all points has been decreased to below 50 ℃，and no reignition phenomenon has occurred.
PDF
399
173
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
