Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines

<div>Spectrum distribution of the cross-layer boreholes: (a) borehole No. 11; (b) borehole No. 12.</div>

Shock and Vibration

fig16

Figure 16

Figure 16: Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines 

Figure 16 | Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines 