ARES-5/E - Seismic-acoustic system for rock-burst hazards assessment


Opis

Assessement of rock-burst hazards in the longwall area.

The task of the ARES-5/E system is converting the velocity of mechanical vibrations of rock-mass into electrical signals by means of SP-5.28/E
geophones which are fastened on anchors situated in the walls of top and bottom roads. Then the signals are sent to the surface, to the surface mining geophysics station, where they are digitally processed and computerinterpreted.

Cechy

 

 

 




Informacje techniczne

Number of measuring channels

        

8 (maximum 64 for surface stations)

Transmission mode

 

natural, current

Maximum transmission range

 

10 km

Band width

 

28÷1500 Hz

Vibrations parameter to be processed

 

velocity

Sensor type

 

SP-5.28/E

Band width of the sensor

 

28 Hz÷1500 Hz

Sensor sensitivity

 

8,66 V/m/s ± 15%

Sensor location

 

any

Supply mode of the object part of the system

intrinsically safe circuit

 

centrally from the surface, from an “iₐ ”

Supply voltage of transmission line

 

36 V ± 1 V

Maximum current in a line

 

≤ 40 mA

Transmission line check

 

short circuit, break

Continuity check of a sensor-connecting wire

with a transmitter

 

no continuity - signal in the channel of 480 Hz frequency

Transmitter test

 

polarization inversion of the line – signal in the channel of 480 Hz frequency

Operation check of a selected channel

 

possibility to listen to a selected channel

Maximum sampling frequency

of seismic-acoustic signals

 

10 kHz

Sampling frequency of signal envelopes

 

250 Hz

Processing dynamics of the signal

 

54 dB

Processing dynamics of the signal envelopes

 

48 dB

Processing computer

 

IBM/PC

Results visualization

 

LCD monitor of the processing computer

Supply voltage of the system

 

230 V ± 10%

Input power of the surface station

 

180 VA

Working temperature

 

- object part: from 5°C÷40°C

- station part: from 5°C÷35°C

Casing protection degree of the underground

part of the system

 

IP 54









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