To modify the mechanic properties of high water backfill material (HWBM) for its engineering application in mining backfill, a series of experiments were performed to investigate the effects of electrochemical treatment on the mechanic properties and electrical resistivity of the HWBM at the early age. Meanwhile, the effects of the potential gradient, power-on time, and water–cement ratio (W/C) on electrochemical modification efficiency were investigated. The results show that the uniaxial compression strength (UCS), elastic modulus, and deformation modulus of the HWBM all first increased and then decreased after electrochemical treatment with the increasing of the potential gradient and power-on time. However, for the HWBM with different W/C, the UCS and electrical resistivity both increased the HWBM except when the W/C was 3 : 1. The elastic modulus and deformation modulus of the samples both increased after electrochemical modification except when the W/C was 4 : 1. Additionally, there is a positive correlation between the UCS and electrical resistivity in HWBM samples. Therefore, it is proved that the electrochemical technology is a potential method for improving the physicochemical properties of the HWBM.

中文翻译：

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电化学处理后高含水回填材料的力学性能和电阻率的变化

为了修改高含水量回填材料（HWBM）的力学性能，使其在采矿回填中的工程应用，进行了一系列实验，研究了电化学处理对HWBM早期力学性能和电阻率的影响。同时，研究了电势梯度，通电时间和水灰比（W / C）对电化学改性效率的影响。结果表明，电化学处理后，随着电位梯度和通电时间的增加，HWBM的单轴抗压强度（UCS），弹性模量和变形模量均先升高后降低。但是，对于具有不同W / C的HWBM中，UCS和电阻率都增加了HWBM除了当W¯¯ / Ç为3：1。将样品除了当电化学改性后既增加了的弹性模量和变形模量W / C为4：1。另外，有UWB与HWBM样品中的电阻率之间呈正相关。因此，证明了电化学技术是改善HWBM的理化性质的潜在方法。