Study on the Effect of Mineral Particle Sizes on the Spectral Characteristics of Sound and Vibrations in Rock Drilling

Table 3

Sound pressure of rocks.

Feed rate (mm/min)	33.1	47.4	71.6	87.7
Average aggregate size (mm)	Sound pressure (Pa)
0.25	0.010492678	0.01049946	0.010479354	0.010518582
1.1	0.010724116	0.010664899	0.010641966	0.010626765
4.4	0.010893667	0.010827145	0.010836857	0.010853092
14.55	0.010868642	0.01098472	0.010964389	0.010964796
27	0.011047972	0.011111382	0.011047431	0.010968967
Average aggregate size (mm)	Vibration of specimen (g)
0.25	0.017490806	0.017121439	0.018323736	0.017593782
1.1	0.018319802	0.017986323	0.017900913	0.018585228
4.4	0.020071552	0.020100486	0.019929967	0.019774683
14.55	0.020934986	0.021593933	0.021106782	0.021128396
27	0.022671581	0.022508665	0.022498021	0.020596241
Average aggregate size (mm)	Vibration of drill stem (g)
0.25	0.019289764	0.019498957	0.019755009	0.0202171
1.1	0.020157523	0.019809953	0.019771174	0.019151515
4.4	0.021209608	0.020964635	0.020814952	0.020765467
14.55	0.02224196	0.023271593	0.023172945	0.023574222
27	0.023026962	0.023035499	0.022533618	0.022037818