Analysis of variance (ANOVA) was adopted to analyze the sensitivities to each factor, which showed that the aggregate–binder ratio had a highly significant effect on the density of the material, the cement–gypsum ratio had a highly significant effect on the compressive and tensile strength of the material, the cement–gypsum ratio had a significant effect on the cohesion and density of the material, and the moisture content had a significant effect on the compressive strength of the material.
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Study on Proportioning Scheme of Coal System Rocky Similar Material Based on Orthogonal Test
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The sentences
It can be seen that, in the range of this test ratio, the cohesion of similar materials with an increase in the aggregate–binder ratio and calcium carbonate content showed a decreasing trend, while the cohesion with an increase in the cement–gypsum ratio showed an obvious linear increasing trend.
It can be seen that, in the range of this test ratio, the density of similar materials with an increase in the aggregate–binder ratio showed an increasing trend; with an increase in the calcium carbonate content, it showed an oscillating change; with an increase in the cement–gypsum ratio, it first decreased and then increased; with an increase in the moisture content, it showed the trend of firstly increasing, then decreasing, and then increasing; the changes in the moisture content and the content of calcium carbonate did not have a significant effect on the density.
The compressive strength with the increase in moisture content showed a trend of first increasing, then decreasing, and then increasing, indicating that the moisture content had a certain effect on the compressive strength of the material; the changes in the aggregate–binder ratio and calcium carbonate content did not have a significant effect on the uniaxial compressive strength.