Evolution of stress state of granular medium under multiple dynamic impacts

All-Russian Conference on Challenges for Development in Mining Science and Mining Industry devoted to the 85th anniversary of Academician Mikhail Kurlenya

Bobryakov, A.P.^1 ; Kosykh, V.P.^1 ; Revuzhenko, A.F.^1

Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia^1

关键词: Dynamic impacts;    Experimental curves;    Fractal analysis;    Granular medium;    Hurst exponents;    Pressure variations;    Stress state;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/53/1/012001/pdf
DOI  :  10.1088/1755-1315/53/1/012001

来源: IOP

【 摘 要 】

The paper describes experimental measurement of pressure in marble chips placed in cylindrical reservoir subjected to weak impacting within a long time. It is found that pressure in the granular material changes non-monotonically but fluctuates relative to hydrostatic pressure with the amplitude equaling order of magnitude of the latter. The fractal analysis of the experimental curves of pressure and number of impacts is performed. The Hurst exponent ranges as 0.67-0.73, and the process of pressure variation is fractal and possesses long-term "memory."