Numerical Simulationand Infrared Radiation Detection Experiment for Acting Area of Bolt Supporting

The displacement and stress of the deformation of roadway were calculated,and corresponding physical similar experiments of thermal infrared(TIR) radiation detection were carried out,taking the parameters of bolted coal roadway in Lu'an mine for numerical and experimental modeling objects.The acting area of bolt supporting was obtained by subtracting the displacements and stresses of the roadway without bolts from those of bolted roadway.The TIR temperature fields of the interaction ranges between bolts and rock were obtained using TIR image subtraction and TIR temperature increment interpolation and fitting.The results show that the processed patterns of TIR images are accordant with the numerical simulated results;the theoretical guides have been provided for the bolt supporting parameters design of spacing interval and array pitch.