Full
Outline
The strength design of filling body is often determined by indoor proportioning test or engineering experience method, but the influences of stope structure parameters such as stope height, stope length and stope width on the strength of required filling body are ignored. Taking a copper mine as the engineering background, based on the L-L strength analysis method, the theoretical strength values of filling body in one-step stope and two-step stope under different structural parameters were calculated by orthogonal tests. The results show that the influence weights of stope structure parameters on the theoretical strength of filling body are ordered as follows: stope height>stope width>stope length. The strength prediction model of filling body in one-step stope and two-step stope was constructed, combined with the existing filling technology, the stope structure parameters were optimized reversely. Finally, the optimal stope structure parameters are recommended as follows: stope height of 5-25 m, stope width of 9-12.5 m, and stope length of 80-120 m. The structural parameters of the stope have been used for on-site production, with strictly controlling the construction specifications of the stope, as well as eliminating the phenomenon of over-excavation and under-excavation. The practical results show that the collapse phenomenon caused by unreasonable structural parameters of the stope and insufficient strength of the filling body basically disappears. The research results can provide reference for the theoretical strength prediction of filling body and the optimization of stope structure parameters.
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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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