Full
Outline
Gently inclined ore bodies are recognized as one of the difficult-to-mine ore bodies. Under the condition that the mine production system is fixed, the conversion of mining for ore bodies with different occurrence conditions significantly affects the mine production efficiency and safety. When a mine converts from mining near-horizontal ore bodies to gently inclined-inclined ore bodies, the traditional method is faced with the problem that some stopes cannot utilize existing roadways for mining and cutting, and a large number of new mining preparation projects need to be developed. To address the above problems, a mining scheme of "arranging stopes perpendicular to the strike of the ore body, canceling cutting raise shafts, and using ore drawing drifts as the initial free surface and supplementary space" was proposed. This scheme can save some mining preparation projects such as trench roadways, medium-deep hole bottom pulling, ore drawing drifts and ore haulage roadways. The stability of this structure was demonstrated using FLAC3D software, and industrial tests were carried out on-site. The results show that the goaf model of stope 62-A has a relatively regular shape, basically no caving occurs and side walls, the ore loss rate is 2.3%, the dilution rate is about 8.5%, and the mining and cutting engineering quantity is reduced by about 14.8%. This scheme has advantages such as adapting to the change of ore body dip angle, simplifying stope structure and reducing engineering quantity, and provides a reference for the mining of similar ore bodies.
34
9
| 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
