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METHOD FOR DETERMINING PHYSICAL SIMILARITY SIMULATION MATERIAL OF SOLID BACKFILL BODY
METHOD FOR DETERMINING PHYSICAL SIMILARITY SIMULATION MATERIAL OF SOLID BACKFILL BODY
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机译:确定固体回填体物理模拟材料的方法
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摘要
A method for determining a physical similarity simulation material of a solid backfill body is provided. A compaction test is run on a gangue backfill body in a lab, to obtain a ε-σ curve regarding the gangue backfill body in the compaction process. Backfill blocks are made by using a thin wood board, sponge, and a paper sheet in different proportions, and then an unconfined compression test is separately run on the backfill blocks used for physical similarity simulation, to obtain εi-σi curves regarding the backfill blocks in the compression process. A sum of squared errors Σ(εi−ε0)2 is introduced to separately calculate a sum of squared errors of the backfill block and that of the gangue backfill body, and accordingly an error between ε-σ curves regarding the test block and the gangue backfill body is determined. Finally, a backfill block for which the sum of squared errors is less than 0.5 is determined as a physical similarity simulation material of the gangue backfill body. By fabrication and selection of similar materials, the present invention can reduce an error caused by a selected backfilling material during a physical similarity simulation experiment, guaranteeing the accuracy of the physical similarity simulation experiment for solid backfill mining.
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机译:提供了一种用于确定固体回填体的物理相似性模拟材料的方法。在实验室中对脉石回填体进行压实测试,以获得与压实过程中的脉石回填体有关的ε-σ曲线。通过使用不同比例的薄木板,海绵和纸板制成回填块,然后对用于物理相似性模拟的回填块分别进行无限制压缩测试,以获得ε i Sub >-σ i Sub>关于压缩过程中的回填块的曲线。引入平方误差总和Σ(ε i Sub>−ε 0 Sub>) 2 Sup>来分别计算误差的平方和煤block石回填块和脉石回填体的回填块,并因此确定关于测试块和煤and石回填体的ε-σ曲线之间的误差。最后,将平方误差之和小于0.5的回填块确定为脉石回填体的物理相似性模拟材料。通过制造和选择相似的材料,本发明可以减少在物理相似性模拟实验期间由选择的回填材料引起的误差,从而保证了用于固体回填开采的物理相似性模拟实验的准确性。
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