Study On The Relationship Between The Coal Rock Mesoscopic Structure Characteristic And Bursting Liability

Bursting liability is the own property of coal and rock medium,which is affected by internal factors such as macerals,coal and rock internal structure.To identify different impact orientation mesoscopic structure characteristics of coal and its relationship with impact bias,selection of strong,weak,three typical impact tendency of coal mine coal sample,using the current uniaxial compressive strength and dynamic failure time,the elastic energy index,the index of impact energy four indicators of impact bias identification of coal and rock,and the instability of physical and mechanical properties and fracture process is briefly analyzed.Then using Computerized Tomography(CT)scanning method,with strong,weak,no three impact tendency of typical coal and rock,scanning for coal and rock medium tomographic images,analyze the mesoscopic structure composition and distribution characteristics,the formation distribution of raw coal and rock cranny difference obvious,strong impact bias native coal and rock fracture presents the characteristics of "short straight" no impact tendentiousness native coal and rock fracture show "grid" shape distribution.For further quantitative primary fracture morphology difference,CT scan images for digital image processing,through the image enhancement and banalization processing technology,extract the primary fracture parameters.Through statistics and postures to learn,to obtain the primary fracture parameters and its relationship with impact bias is analyzed,based on the mesoscopic structure of coal and rock impact bias new indexes,and gives the specific identification method and basis.Finally,through 3 d reconstruction technology for different impact tendency of coal rock mesoscopic structure,analyzing the characteristics of the primary fracture spatial distribution.Using computed tomography(CT)non-destructive testing specimen under uniaxial compression experiments,through acoustic emission spatial positioning inversion analysis of crack propagation law and its relationship with native fissure,by this paper is based on the theory of energy mesoscopic structure characteristics of the whole process of coal and rock rupture instability.