煤岩力电耦合模型及其参数计算
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摘要
电磁辐射技术已经在矿山煤岩动力灾害预报中得到了应用,根据煤岩强度的统计理论和损伤力学理论,建立了受载煤岩的力电耦合模型,推导得到了该模型中参数的确定方法,并结合实验结果对其中的参数进行了计算.结果表明:煤岩材料的破坏是内部代表性体元微损伤累积的结果,电磁辐射可以反映煤岩体的损伤程度,力电耦合模型能够较好地描述煤岩变形破裂过程的电磁辐射规律,参数的拟合相关系数较大说明该方法合理可行.
Electromagnetic Emission(EME) technology has been applied in forecasting dynamic disasters of coal or rock in coal mine.The coupled stress-electricity model(CSEM) of coal or rock was established according to the theory of damage mechanic and statistical theory of coal or rock strength.The measurement method of the model parameters was obtained,and the two parameters were accounted with the EME experimental results of coal samples.The results show that the fracture of coal or rock is due to the consequences of accumulative damage of inner representative volume elements(RVE),EME can reflect the damage level of coal or rock,and this model can describe EME rule of deformation and fracture of coal or rock.The correlation coefficient of parameters fit is big which show that this method of parameters measurement is reasonable and accurate.
Electromagnetic Emission(EME) technology has been applied in forecasting dynamic disasters of coal or rock in coal mine.The coupled stress-electricity model(CSEM) of coal or rock was established according to the theory of damage mechanic and statistical theory of coal or rock strength.The measurement method of the model parameters was obtained,and the two parameters were accounted with the EME experimental results of coal samples.The results show that the fracture of coal or rock is due to the consequences of accumulative damage of inner representative volume elements(RVE),EME can reflect the damage level of coal or rock,and this model can describe EME rule of deformation and fracture of coal or rock.The correlation coefficient of parameters fit is big which show that this method of parameters measurement is reasonable and accurate.
引文
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