Acoustic emission of rock mass under the constant-rate fluid injection

Geodynamics and Stress State of the Earth's Interior 2017

Shadrin, A.V.^1 ; Klishin, V.I.^1

Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia^1

关键词: Fluid injections;    Functional connection;    Hydro-fracture;    Injection rates;    Integral parameters;    Permeability and porosities;    Process parameters;    Time behavior;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/134/1/012057/pdf
DOI  :  10.1088/1755-1315/134/1/012057

来源: IOP

【 摘 要 】

The authors study acoustic emission in coal bed and difficult-to-cave roof under injection of fluid by pumps at a constant rate. The functional connection between the roof hydrofracture length and the total number of AE pulses is validated, it is also found that the coal bed hydroloosening time, injection rate and time behavior of acoustic emission activity depend on the fluid injection volume required until the fluid breakout in a roadway through growing fractures. In the formulas offered for the practical application, integral parameters that characterize permeability and porosity of rock mass and process parameters of the technology are found during test injection.