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In order to study the influence of heterogeneous strata on blasting, the stratigraphic factors and coupling methods were analyzed, and the thickness, density and dip angle of the rock strata were numerically studied by different coupling methods. The results show that the increase of the thickness of the middle sandstone and the increase of the density of the upper and lower layers will inhibit the crack propagation, and the inclined sandstone rock layer will produce horizontal and oblique staggered cracks, and the water-coupled charge blasting can protect the blast hole and increase the effective stress of the blast stress wave, and the selection of appropriate uncoupling coefficient can increase the energy transmitted by the blasting stress wave. The blasting force of the cracker is greater, and the addition of a warhead can form an initial crack and guide further crack propagation. Designing a reasonable scheme according to the formation condition can improve the blasting and permeability efficiency.
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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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