Alteration in Material Properties of an Intact Rock due to Drilling and Bolting Operations

Table 1

Details of specimens tested.

Serial number	Depth in drill hole from ground surface (m)	Specimen designation		Diameter (mm)	Length (mm)
		Virgin	Bolted
1	17-18	T1V	T1B	58.8	117
2	25-26	T2V	T2B	58.8	117
3	36-37	T3V	T3B	58.8	117
4	64-65	T4V	T4B	54	108
5	79-80	T5V	T5B	54	108
6	88-89	T6V	T6B	54	108
7	113-114	T7V	T7B	54	108
8	115-116	T8V	T8B	54	108