Hydro-geophysical Instruments

YT120(A) Audio-frequency electric penetrator

Through excitation of a stable whole-space low frequency electric field in the mining face, based on mine geological conditions, the YT120(A) device identifies the spatial relationships of water-bearing geological bodies at certain depth in the roof and floor of a mining face and it also determines the distribution of relative water-enriched zones to provide a reliable basis for water control design and operation.

The device features an intrinsic safety explosion-proof design for coal mines. The small size of the device makes it convenient to carry. It also provides an easy operation, stable and reliable performance and easily interpreted detection results.

The application software has functions of data processing and graphing, generating apparent conductivity profiles after data processing.

¦ Application

. Suitable to detect inside of a mining face with a detection distance of 300m

. Detection of water-enriched areas within 100m below the mining face floor

. Detection of relative water abundance, horizontal distribution and depth of water-enriched bodies

. Detection of water-enriched area within 100m above the mining face roof

. Detection of horizontal distribution of a water-bearing previous working area and collapsed columns in the mining face

. Monitoring of grouting effect

¦ Technical specification

.Transmitter

  Max transmitting voltage              90V

  Max transmitting current              70mA

  Transmitting frequency                4 options (15Hz, 30Hz, 70Hz, 120Hz)

.Receiver

Receiving voltage                    0~1V

  Precision of receiving voltage           1% (100mA)       

Receiving frequency                   4 options (15Hz, 30Hz, 70Hz, 120Hz)

YDZ(A) electric resistance detector

The YDZ (A) DC electric resistance detector is used to identify the variation of apparent resistivity through excitation of a stable whole-space electric field in mine roadway.

The instrument features an intrinsic safety explosion-proof design for coal mines and its small size makes it convenient to carry. It is also easy to operate and provides a stable and reliable performance.

The application software has functions of fine data processing and automatic graphing. The detected data can be transmitted to a computer for management. Through simple processing, a clear display and an easy to interpret profile of apparent resistivity can be automatically generated.

 ¦ Application

.Detection of water-enriched zones within100m inside roadway roofs or floors

.Detection of aquiclude thickness and original water intrusion height in the roadway floor

.Detection of water-bearing and intruding structure within 80m ahead of roadheader.

.Detection of water-bearing and intruding structures inside the mining face

.Test of grouting effect

¦ Technical specification

.Transmitting voltage            =90V

.Max transmitting current         700mA

.Receiving voltage range         ±2V

.Receiving voltage precision      1% (100mV)

YD32(A) High resolution electric resistance detector

The YD32(A) is the leading instrument in China for supplying high-power electricity in underground coal mines through excitation of a stable whole-space electric field in mine roadways to identify the apparent resistivity variations.

The device features an intrinsic safety explosion-proof design for coal mines and its small size makes it convenient to carry. It is also easy to operate and provides a stable and reliable performance. This device is a performance leader in terms of long distance detection, on-site graphing and self-testing of ground resistance amongst similar products.

The application software has functions of fine data processing, automatic graphing and result data management. Through simple processing, a clear display and an easy to interpret profile of apparent resistivity can be automatically generated.

¦ Application

.Detection of water-bearing/intruding structures within 100 meters ahead of roadheader

.Detection of water-enriched zones within 100 meters inside roadway roofs or floors

.Detection of aquiclude thickness and intrusion height in the roadway floor

.Detection of water-bearing/intrusions of the roadway wall

.Test of grouting effect

¦ Technical specifications

.Transmitting channels       4 (2 independent synchronized transmission circuits per channel)

.Max transmitting voltage        100V

.Max transmitting current    100mA

.Receiving channels         32

.Precision of receiving voltage  0.02% (100mV)

.Receiving voltage range ±2V

l YCS2000A???????YCS2000A Transient electromagnetic instrument(TEM)

YCS2000 TEM is an intrinsic safety instrument for water-bearing/intruding structure detection in the front, wall, roof and floor of the area ahead of the roadheader. The detection distance can reach 80m to 100m with a blind zone smaller than 10m. This instrument adopts advanced IC technology, featuring leading anti-interference capability and high sensitivity in the complex working environment of underground mines.

¦ Application

.Multi-directional detection of water-bearing/intruding structures of the area ahead of the roadheader

.Multi-directional detection of water-bearing/intruding structures of the roadway roof and floor

.Multi-directional continuous detection of water-bearing/intruding structures of the roadway wall

.Investigation of the gob water, faults, collapsed columns in previous working areas

.Geological exploration of shallow strata for roadway, railway and bridge engineering

¦ Main configuration

.Host                      YCS2000-Z TEM instrument for mines                    1

.Reception probe   YCS-T reception antenna of the TEM                      1

.Components         Special transmission coil                                          1

                                 Transmission coil frame (optional)                            1

.Accessories          YCS2000-Z multi-charger for host                            1

                                 YCS-T multi-charger for reception antenna              1

                                 USB communication line                                           1

                                 Connection cable for reception antenna                    1

.Software and instruction       TEM interpretation software                       1

¦ Technical specification

Equivalent area of probe            4502 or 18002

Dynamic range                     180dB

Data stacking                       up to 10000 times

Amplification factor                 1,   10,   100,   1000

Sampling rate           2MSPS,   1MPS,   0.5MPS,   0.25MPS,  

 0.125MPS,   0.0625PMPS

Transmitting voltage                 =6.5V

Transmitting current                  =1.5A

Transmitting frequency               2.5Hz,   6.25 Hz,   12.5 Hz,   25 Hz

Turn-off time                       0.5µs

Continuous operation time             =6h