冲击地压前兆信息识别的扩容理论

DILATANCY THEORY FOR IDENTIFICATION OF PREMONITORY INFORMATION OF ROCK BURST

将煤体的破裂变形分为3个阶段,即弹性阶段、非线性阶段与突变阶段。用3个特征量描述了煤体扩容变化的过程,即体积压缩、稳定扩容及扩容突变。建立了冲击地压的扩容模型,扩容理论解释了冲击地压前兆信息的稳定性与突变性,是冲击地压前兆信息识别的理论基础。并采用RFPA软件验证了扩容突变与声发射前兆信息的关系。

Based on the experiments and the numerical simulations of the fracture and instability of impact coal mass,the deformation and break of coal mass are divided into 3 stages,namely,elastic stage,nonlinear stage and mutation stage.The dilatation process of coal mass is depicted by 3 characteristic quantities,namely,volume compression,steady dilatation and dilatation mutation.The dilatation model of rock burst is established.Dilatancy theory explains the stability and mutation of premonitory information of rock burst.It is the theoretical basis for identification of premonitory information of rock burst.The software RFPA is used to validate the relation between dilatation mutation and premonitory information of acoustic emission.