【摘要】 设计了采用非接触方式、高放大倍数、高效率的电荷传感器,并给出了电荷传感器的设计原理和技术指标。利用研制的电荷传感器对岩石变形破裂过程中产生的电荷感应信号进行了检测试验。结果表明,岩石在变形破裂过程中会产生电荷感应信号,并能够被研制的电荷传感器检测到;电荷感应信号是瞬时脉冲的;随着加载应力水平的增加,电荷感应信号强度增强,在峰值应力前,电荷感应信号强度达到最大值;在破裂面接收到的电荷感应信号较强,主破裂面接收到的信号最强,因而电荷的产生和岩石的破裂有很大的关系。作为正在探索的检测岩石破坏过程的手段之一,电荷感应方法应是一种很具潜力的方法,值得深入研究。更多还原

【Abstract】 A non-contact,high-magnification,high-speed charge sensor is designed,and the design principles and technical indicators of the charge sensor are given.An experiment on the charge-induced signal during the deformation and fracture process under uniaxial compression was conducted by means of the self-designed charge sensor.The results indicate that the charge-induced signals during the rock deformation and fracture process can be detected by the self-designed charge sensor.There are the charge-induced signals during the rock deformation and fracture process.Some pulse-like transient variations in the charge-induced signals appear in the deformation and fracture process.With the increase of the rock stress,the strength of the charge-induced signals increases,and the signal intensity reaches maximum value before the rock peak stress.The charge-induced signals are lower at the small deformation and crack surface of the specimen.The signals received in fractured surface are stronger and the signals received at the main fracture surface are strongest.That indicates the charge generation has a great relationship with rock failure.The charge induction method should be a very potential approach for exploring the rock failure process.It is worth to study intensively.更多还原