PDF
Full
Outline
In order to swiftly elucidate the influence of internal parameters on the fracturing performance of a liquid CO2 fracturing tool and optimize its functionality for enhanced coal seam gas extraction efficiency，a rapid assessment experimental apparatus was designed. A set of 9 orthogonal experiments involving 4 horizontal and 3 influencing factors was conducted utilizing a 38 mm mining-specific fracturing tool. The study analyzed the relative significance of the internal charge quantity in the heating tube，liquid CO2 filling volume in the main pipe，the thickness of the fracture plate，and the caliber of the release aperture on the fracturing tool's performance. Furthermore，pivotal influencing factors were subjected to fixed-variable experiments to explore their impact patterns on the fracturing performance of the liquid CO2 fracturing tool. Results indicate that，for the 38 mm mining-specific CO2 fracturing tool，the thickness of the fracture plate exerts the most substantial influence on the fracturing tool's performance，followed by the internal charge quantity in the heating tube. The impact of the liquid CO2 filling volume in the main pipe and the caliber of the release aperture is comparatively weaker. The fracturing performance of the liquid CO2 fracturing tool gradually stabilizes with an increase in the thickness of the fracture plate，reaching a point where the plate does not rupture. When the internal parameters of the 38 mm fracturing tool are set to a CO2 mass of 0.33 kg，a release caliber of 18 mm，a charge quantity of 60 g，and a fracture plate thickness of 2.0 mm，the tool's fracturing performance corresponds to a TNT(Trinitrotoluene) equivalent of 0.202 kg which is enhanced by 21.9 % compared to the current on-site parameters.
PDF
311
123
| 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
