ABSTRACT
Monitoring instruments were used to record the vertical component, longitudinal component and transverse component of PPV (peak particle velocity) under different charge weights and distances.
2.1 The monitoring instruments
Selecting precise and accurate monitoring instruments is the key to the monitoring results. In this field monitoring, the UBOX-20016 blasting vibration recorder, produced by Sichuan TOP Measurement & Control Technology Co. Ltd, was used to record the blasting vibration signals. The major hardware indices are as follows: the maximum sampling rate is 200 KSps/CH, the resolution ratio of A/D is 16 Bit, the measuring range is stored program control of ±1 V, ±2 V, ±5 V, ±10 V, the input impedance is 106 Ω, the capacitance ≤ 25 PF, the input signal bandwidth is 0 Hz∼100 KHz, the DC accuracy error ≤ ±0.2%, the passband ripple ≤ ±0.05 dB, the signal to noise ratio ≥ 76 dB, and the isolation degree of channel ≥100 dB.
