Experimental Investigation on Hard Rock Breaking with Fiber Laser: Surface Failure Characteristics and Perforating Mechanism

Table 6

Compositions of granite before and after laser perforation.

	Quartz (%)	Potassium-feldspar (%)	Plagioclase (%)	Calcite (%)	Clay (%)
Granite	49.5	6.5	22.7	1.6	19.7
Lased	34.0	34.6	17.7	—	13.7