Full
Outline
The rock mass strength is a key mechanical parameter for the safety and stability analysis of mining engineering. Combined with the key project of small-scale mechanized mining technology in Shanhu Tungsten Mine, based on the detailed investigation of rock mass structural plane, three methods of BQ, Q and RMR were used for classification of rock mass quality and stability evaluation. Then, the rock mass strength was estimated based on quantitative GSI and Hoek-Brown Criteria to obtain accurate and reliable parameters of rock mass strength. The research results are concluded as follows. Firstly, the dominant joint plane strikes NNW-SSE or NW-SE, inclines NE or SW, and the dip angle is large. The volume joint number Jv is 7.07−9.88/m3, the integrity coefficient Kv is 0.55−0.63, and the integrity evaluation is relatively intact. Secondly, the [BQ] value, Q value, and RMR89value of the limestone rock mass are 380.96, 5.58, and 59, respectively, and the grade of rock mass quality is Ⅲ or average. Thirdly, according to the BQ classification results, when the span of roadway or stope is less than 5 m, the surrounding rock can be basically stable. According to the Q classification results, the maximum unsupported span of roadway or stope is about 6.35 m. According to the RMR classification results, when the span of roadway or stope is 5 m, the average standing stability time of surrounding rock can reach 7 days. Finally, based on quantitative GSI and Hoek-Brown criteria, the Hoek-Brown strength parameters and equivalent Mohr-Coulomb strength parameters of limestone rock mass are obtained, which can provide accurate and reliable mechanical parameters for mining design and the stability analysis of rock.
63
30
| 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
