Full
Outline
To investigate the influence of stope width and stoping sequence on the bearing capacity of panel pillars, this study takes the panel mining using the stage open-stope with subsequent backfill mining method in Sijiaying Iron Mine as the engineering background. The stress response and deformation failure characteristics of panel pillars under different stope widths and stoping sequences were analyzed, and the optimal mining scheme was selected. The research results are as follows. Firstly, stope width and panel stoping sequence jointly influence the stress response characteristics of panel pillars. Under different stoping sequences, both the maximum principal stress and the minimum compressive stress within the pillars exhibit an increasing trend as the stope width increases. Secondly, stope width and panel stoping sequence jointly influence the deformation failure characteristics of panel pillars. Under the same stoping sequence, both the displacement of the pillars and the volume of the plastic zone increase with the increase in stope width. Finally, under the same stope width, the displacement of the pillars and the volume of the plastic zone rank from high to low in the order of "from one side to the other" "from both sides to the center", and "from the center to both sides". Taking into account safety and production capacity of the stope, the optimal mining scheme for this mine has been determined to be a mining width of 20 meters and a mining sequence of "from the center to both sides".
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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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