Full
Outline
In response to the problem of excessive local support parameters and excessive support material consumption leading to longer support cycles and higher annual support costs in the support of roadway outside the vein in a certain lead-zinc mine, the support of roadway outside the vein in the 12-15 line of 2416 section of this mine was taken as the engineering background. After conducting rock mass quality evaluation and measuring relevant mechanical parameters by test of the rock mass, the optimal support scheme was selected by comparing the support effect and cost through numerical simulation and on-site testing. The results show that the combined support method of anchor rod+ steel plastic mesh + double reinforcement bar + shotcrete can meet the stability of the roadway outside the vein during its service life. Following parameters were selected, including the length of anchor rod with a length of 2.4 m and a diameter of 18 mm, as well as the MSCKa resin anchoring agent, with a spacing of 1.1 m, a steel plastic grid mesh specification of 4.5 m×2.5 m, a hole mesh of 6 cm, a tensile load of 60 kN, a double reinforcement bar diameter of 6 mm, and a sprayed concrete strength of 20 MPa. The support cost can be reduced by 599.46 RMB/m. The research results can provide a reference and guidance for the design of underground roadway support in similar mines.
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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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