Full
Outline
Taking the loose and weak strata in the freezing section of the main well of a mine in Laizhou as the research object, the temperature field distribution law of the double-ring freezing hole was compared and analyzed by means of field measurement and ANSYS numerical simulation. It was found that the freezing effect of the double-ring freezing hole was not ideal. Based on the comprehensive study of the formation and development law of the freezing wall for the double-ring freezing hole, a new optimization scheme of the three-ring freezing hole was proposed, that is, the single-ring freezing hole on the inner wall of the well and the double-ring freezing hole on the outer wall were arranged, and the ANSYS finite element software was used to analyze and compare the freezing effect of the temperature field before and after optimization. The results show that the optimization scheme shortens the circulation time by more than 10 days, effectively reduces the internal temperature of the wellbore and shortens the circulation time of the freezing wall. After freezing for 60 days, the thickness of the freezing wall of the optimization scheme has reached about 4.8 m, which is much larger than that of the original scheme, and the temperature is about 4−5 ℃ lower than that of the original scheme. It shows that adding a circle of freezing holes in the well is an effective method, which can quickly reduce the temperature around the well to the lowest, and play a certain guiding role for well excavation with complicated geological conditions such as safe construction of well excavation and difficult freezing.
90
44
| 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
010-62662699(Operation and Technical Support)
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
