Full
Outline
Large-scale continuous mining of deep ore bodies is the frontier research direction of deep mining in the future. Aiming at the problem of mutual restriction between the traditional intermittent mining operation mode and the deep intelligent and efficient mining of deep hard rock deposits, a continuous mining operation mode of parallel mining and filling was proposed, which used flexible isolation layer to realize the parallel filling and continuous mining process. The strength distribution of filling body in parallel filling process of high-stage large stope was analyzed by means of theoretical calculation formula and FLAC3D numerical software, and the strength requirements of filling body at different heights of high-stage stope were determined. PFC discrete element software was used to analyze the flow law of ore-filling granular and the deformation damage characteristics of isolation layer in parallel filling and continuous ore drawing. The results show that in the parallel filling and continuous ore drawing process, the 28 d consolidation bearing strength of the filling body at the top and bottom of the stope should be greater than 8 MPa. With the filling and ore drawing, the maximum load of the isolation layer is 57 kPa when it is close to the funnel mouth of the ore drawing. At this time, the isolation layer has obvious concave deformation, and the damage near the pillar area on both sides increases, resulting in obvious tensile and compressive damage. The study can provide reference for the continuous operation of deep ore body mining.
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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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