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Outline
Obtaining the stability level of rock mass is of great significance to the deep mining of ore body, surrounding rock support and filling of goaf. Based on the engineering geological conditions of Zhongguan Iron Mine, the basic quality BQ values of rock mass at the measuring points were determined through laboratory rock mechanics basic property test, field rock mechanics test, field rock joint investigation and in-situ stress test. Using the data processing and spatial analysis function of ArcGIS software, the spatial distribution prediction model of rock mass quality in the study area was established through Kriging interpolation technology. The rock mass quality of –230 m horizontal ore body was predicted and analyzed using the model, and the field measurement verification was carried out. The results show that the prediction results of the spatial distribution of rock mass quality are in good agreement with the actual situation. The basic quality BQ value of the –230 m level ore body in Zhongguan Iron Mine is 57.843 - 347.573, which is in the fourth and fifth grades. The ore body quality is poor, easy to break and unstable. The spatial distribution prediction model of rock mass quality can provide a method for studying the stability level of rock mass under the condition that rock mass engineering is not fully exposed, and also can build a theoretical basis for the safe mining of Zhongguan Iron Mine in the future.
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| 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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