Full
Outline
Aiming at the problems of poor durability and water stability of traditional gravel transportation roads in open-pit mines, the transportation roads were modified using solid waste around the mine. The ratio of blasting waste rock and surrounding soil in the cement stabilized layer was determined by laboratory tests. The unconfined compressive strength, water stability and durability of the cement stabilized layer with different the dosages of curing agent were discussed. The results show that the unconfined compressive strength of the unmodified material is lower than 0.2 MPa, and when the ratio of blasting waste rock and surrounding soil is 4:6, the strength of blasting waste rock can be fully utilized and the pavement can be well formed. The curing agent can significantly improve the strength of the material. When the dosage of curing agent is 8%, the unconfined compressive strength exceeds 2.5 MPa, the water stability coefficient is 137.68%, and the saturated compressive strength of the sample exceeds the initial unconfined compressive strength. In the dry-wet cycle test, the compressive strength of the sample increases significantly and then decreases slightly with the increase of the number of cycles. When the dosage of curing agent is more than 6%, the durability is significantly improved. The deflection value test and comprehensive cost analysis were carried out using the combination of stone-soil ratio of 4:6 and dosage of 8%. The results show that the deflection value of the modified pavement is 9.07 (0.01 mm), the pavement quality was significantly improved, and the comprehensive cost is 47.5 yuan/m2, which is significantly lower than that of the original gravel pavement.
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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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