Study on the Deformation Mechanism of Soft Rock Roadway under Blasting Disturbance in Baoguo Iron Mine

Table 6

Safety standard of blasting vibration.

Number	Protected object class	Safety PPV (cm/s)
		f ≤ 10 Hz	10 Hz < f ≤ 50 Hz	f > 50 Hz
1	Adobe house	0.15∼0.45	0.45∼0.9	0.9∼1.5
2	General civil buildings	1.5∼2.0	2.0∼2.5	2.5∼3.0
3	Industrial and commercial buildings	2.5∼3.5	3.5∼4.5	4.2∼5.0
4	Ancient buildings	0.1∼0.2	0.2∼0.3	0.3∼0.5
5	Operating equipment of power station and central control room	0.5∼0.6	0.6∼0.7	0.7∼0.9
6	Hydraulic tunnel	7∼8	8∼10	10∼15
7	Traffic tunnel	10∼12	12∼15	15∼20
8	Mine roadway	15∼18	18∼25	20∼30
9	Permanent slope	5∼9	8∼12	10∼15