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为研究复杂水文地质条件下矿井底板突水导水通道形成及破坏情况的判断问题,基于电荷感应监测技术,通过水压致裂试验对比不同壁厚电荷信号规律,研究导水通道距离采掘空间不同深度下电荷特征,探究电荷前兆信息与底板突水通道形成过程的联系。结果表明:电荷信号和声发射信号均在起裂压力前出现较大脉冲,这2种信号出现的顺序随机,这与岩体的结构以及组成有关;壁越厚,起裂压力越大,释放的电荷量越大,电荷释放与试样变形破坏所需的力存在必然联系;不同壁厚试样电荷感应信号在衰减时间与电荷累积量等方面有差异,通过电荷感应信号探测导水通道形成深度是可行的。
In order to study the formation and destruction of water inrush and water channel in mine floor under complex hydrogeological conditions, based on the charge-induced monitoring technique, the water-pressure crack test was used to compare the signal characteristics of different wall thickness charges. Depth charge characteristics to explore the charge precursor information and floor water inrush channel formation process. The results show that both the charge signal and the acoustic emission signal appear larger pulses before the initiation pressure, and the order of the two signals is random, which is related to the structure and composition of the rock mass. The thicker the wall, the larger the cracking pressure is, The larger the amount of charge, the charge release and the force required to deform the sample are inevitably linked; different wall thickness of the charge-induced signal in the decay time and charge accumulation, etc. are different, through the charge-induced signal detection channel Depth is feasible.