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Roof Rock Quality Evaluation for Roadway of №92 Ore Body in Tongkeng Mine
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Zichao YANG1, Shaoguo ZHANG2, Pao ZHONG2, Qinghan QIN2, Hui WANG1, Qingfa CHEN1
Mining and Metallurgical Engineering | 2023, 43(2) : 26 - 29
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Mining and Metallurgical Engineering | 2023, 43(2): 26-29
• MINING •
Roof Rock Quality Evaluation for Roadway of №92 Ore Body in Tongkeng Mine
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Zichao YANG1, Shaoguo ZHANG2, Pao ZHONG2, Qinghan QIN2, Hui WANG1, Qingfa CHEN1
Affiliations
  • 1.College of Resources, Environment and Materials, Guangxi University, Nanning 530004, Guangxi, China
  • 2.Tongkeng Mining Branch of Guangxi Huaxi Group Company Ltd, Hechi 547205, Guangxi, China
Published: 2023-04-01 doi: 10.3969/j.issn.0253-6099.2023.02.006
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With a transport roadway at+392 m section of №92 ore body in Tongkeng Mine as an example, the testing area was firstly divided for investigating the required on-site data. Then, the roadway roof rock was scored by using mining rock mass rating (MRMR) system for rock quality classification and rating. Finally, an appropriate support measure was proposed for the roadway roof based on the grading result. It is shown that the roof rock mass has its score of 50 by RMR system and is rated to be Grade Ⅲ. However, with the modified MRMR system, the rock mass has its score of 29 and is rated to be Grade IV. Compared with the on-site actual investigation of structural plane, the rating result by using MRMR system is much more consistent with actual situation.

rock mass stability  /  rock mass quality grading  /  underground mines  /  rock mass quality  /  mining rock mass rating (MRMR) system  /  roadway roof  /  support scheme
Zichao YANG, Shaoguo ZHANG, Pao ZHONG, Qinghan QIN, Hui WANG, Qingfa CHEN. Roof Rock Quality Evaluation for Roadway of №92 Ore Body in Tongkeng Mine[J]. Mining and Metallurgical Engineering, 2023 , 43 (2) : 26 -29 . DOI: 10.3969/j.issn.0253-6099.2023.02.006
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Year 2023 volume 43 Issue 2
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.02.006
  • Receive Date：2022-10-28
  • Online Date：2026-03-05
  • Published：2023-04-01
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  • Received：2022-10-28
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Affiliations
    1.College of Resources, Environment and Materials, Guangxi University, Nanning 530004, Guangxi, China
    2.Tongkeng Mining Branch of Guangxi Huaxi Group Company Ltd, Hechi 547205, Guangxi, China
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表12种不同金属材料的力学参数
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
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