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Taking the Dengjiashan aggregate mine in Jiangxi Province as the research object, an optimization mechanism and engineering application of air deck charge blasting technology on the powder ore rate was systematically explored in this paper. Firstly, the engineering geological conditions of the mine were analyzed, including the rock mass characteristics and the distribution and development of joints and fissures. This assessment provided a foundation for subsequent blasting test research. Secondly, this research introduced a theoretical framework of air-decking charging and proposed a blasting method utilizing air decks. The mechanism of air-decking charging emphasizes its role in attenuating explosion stress waves, prolonging explosive gas expansion duration, and optimizing energy distribution. Furthermore, this study systematically investigated the influence of different air-decking configurations (top, middle, and bottom placement) on the powder factor. Then, experimental studies and data analysis can validate the method's reliability, culminating in its successful application in field-scale engineering. Thirdly, blasting parameter optimization was carried out using the air deck blasting method based on experimental data, focusing on explosive consumption and inter-hole delay time as key variables. A parameter optimization regression model was subsequently developed (R2=0.8697) to enhance blasting efficiency, demonstrating strong predictive reliability through experimental validation.
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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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