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Outline
In order to realize the smooth transition from caving method to filling method for a high value iron ore body, a combined mining scheme of caving method to filling method was proposed from the perspective of stope stability and full recovery of high value ore body.Using simplified beam method and Rubenieit method, the thickness of isolated top pillar in the transition area of caving method to filling method is 10.6 m and 9.4 m respectively. Based on the theoretical calculation results of two kinds of isolated top pillar thickness, the numerical simulation of the combined mining scheme of the iron ore with caving method to filling method was carried out by FLAC3D software. The thickness of the isolated top pillar in the transition area of the combined mining scheme of the iron ore with caving method to filling method is defined as 10 m. The research results have been applied to the actual production of the iron mine, and good economic benefits have been achieved, which provides a reference for caving method to filling method in the same type of mine.
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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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