Full
Outline
With the increasing complexity of orebody occurrence conditions and the continuous improvement of resource recovery requirements, complex fractured orebodies have become important targets for safe, efficient, and low-dilution-loss mining in metal and non-metal mines. The backfill mining method provides an important technical approach for the mining of such orebodies by controlling stope exposure, reconstructing the surrounding rock-pillar-backfill bearing relationship, and regulating the mining-backfill cycle. Based on a review of research and engineering applications of backfill mining at home and abroad, starting from the basic conditions and dominant control mechanisms of orebodies, the backfill mining methods for complex fractured orebodies were categorized into the small-exposure continuous mining category, structural unit delayed backfill category, and strong-control combined support backfill category. Furthermore, combined with typical cases, their applicable conditions, control mechanisms, and engineering effects were compared. The research results show that the small-exposure continuous mining category is suitable for the fine mining of thin and narrow orebodies, and orebodies with complex boundaries; the structural unit delayed backfill category can balance the production capacity and stope bearing conversion of medium-thick to massive orebodies; the strong-control combined support backfill category can improve the stability control capability for weak roofs, large spans, and local fractured zones. At the present stage, it is still necessary to focus on solving issues such as the matching of engineering geological conditions and method parameters, the sequential connection of mining and backfilling, the process control of dilution and loss, the composite bearing mechanism, and technical economy. In the future, geological zoning, function-oriented backfill design, collaborative organization of mining-support-backfill-transport, and dynamic optimization driven by monitoring feedback should be strengthened.
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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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