Full
Outline
Aiming at the problems of limited mining process and reduced production capacity of deep filling mining method caused by the change of geological conditions in a copper-nickel mine, the process optimization, production capacity check and capacity transition scheme of downward drift filling mining method were studied. Combined with the technical conditions of mining and the current situation of mining methods, in order to realize the continuous and efficient production of downward drift filling method as the optimization research goal, three mining methods were proposed, including downward drift stoping and filling along the strike, downward drift stoping and filling perpendicular to the strike and downward drift stoping and filling obliquely to the strike. Through the comprehensive comparative analysis of the advantages and disadvantages of each scheme and the technical and economic indicators, it is determined that the scheme of downward drift stoping and filling along the strike is the best scheme. The research proposed a capacity calculation method under the condition of continuous mining in the panel. Combined with the occurrence characteristics of the ore body in the middle section of the mine, the panel was divided into three categories, and the production capacity was calculated respectively. On this basis, the calculation of the production capacity of the section was completed, and the capacity transition scheme of the new and old mining processes was formulated. The work deployment of the transition period was clarified. The results show that the optimized filling mining method is technically feasible, safe and efficient, and the capacity transition scheme is operable, which can provide technical support for the mining production and productivity transition of the 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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