Time function for borehole explosive loading and specific energy based on different coupling mediums

To improve explosive crushing effect and control explosive vibration through selection of coupling mediums,the calculation models of explosive loading and specific energy were established under different coupling mediums of explosion source.The time function and curve of explosive loading and specific energy in rock medium were calculated with programming.The results showed that: the initial borehole explosive loading is the maximum,but its attenuation is also the fastest when using coupling charge;although that is smaller in water decoupling charge,its attenuation is the slowest;the specific energy of water decoupling charge is the maximum,that of water coupling charge is smaller;while both of barehole explosive loading and specilfic energy of air and soil-decoupling charge are minimum.So water decoupling charge was good for improving blasting crushing effect and bad for controlling blasting vibration.