Full
Outline
In order to optimize the performance of filling materials while reducing filling costs, the research on filling materials proportion was carried out. Based on the RSM-CCD method, an experiment with 4 factors and 5 levels was designed to construct a response surface regression model with factors of fly ash mass fraction A, cement mass fraction B, calcium carbonate mass fraction C, and slurry mass fraction D. The slump of the filling slurry and the uniaxial compressive strength of the filling body at 7 d and 28 d were the response values, respectively. The influence of single factor and the interaction of various factors on material properties were analyzed, and the lowest cost filling material proportion scheme was sought on the basis of meeting performance requirements. The results show that the slump of high-concentration filling slurry is only affected by a linear single factor, and the interaction has no significant effect on it. The slump increases firstly and then decreases with the increase of A, B, and C, and decreases with the increase of D. Linear and interactive effects have a significant impact on the strength of high-concentration filling body at 7 d and 28 d. There is no significant relationship between the interaction effect AC and the strength of the filling body. The increase of single factor in AB or CD will promote the strengthening effect of the other factors on the compressive strength of the filling material at 28 d, while the increase of single factor in AD, BC, and BD will inhibit the enhancement effect of the other factors on the compressive strength of the filling materials at 28 d. The optimal proportion of filling materials considering cost-effectiveness is 18.0% of fly ash mass fraction, 10.9% of cement mass fraction, 1.3% of calcium carbonate mass fraction, and 84.0% of slurry mass fraction. This proportion scheme meets the design standards for paste filling in engineering examples.
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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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