Determining bulk density of mine rock piles using ground penetrating radar frequency downshift

Benter, Allen; Antolovich, Michael; Moore, Wayne

doi:10.1109/iwagpr.2011.5963892

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…6 was cali-al. 2010) and the bulk density of mine rock piles (Benter et al 2011). Guha et al (2005) linked the spectral shift toward higher frequencies to thin beds in sedimentary environments.…”

Section: Contents Of the Tankmentioning

confidence: 99%

Time‐lapse monitoring of DNAPL in a controlled cell

Orlando

Renzi

2013

Near Surface Geophysics

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A multi-component GPR antenna is used to perform time-lapse measurements in a controlled experiment simulating DNAPL release. The DNAPL monitoring is based on the delay time of a reflection from the back side of a cell and on spectral analysis of traces. The study shows that co-polar and cross-polar antennas detect a similar pull-up of the reflection from the back of the cell induced by the DNAPL. The amplitude of the reflection from the DNAPL is weaker in the cross-polar data with respect to the co-polar data and in actual cases it could not be detected by both antenna configurations. In addition we observe a change in the amplitude spectra of the traces collected at the DNAPL release with respect to those collected in an uncontaminated area. The amplitude spectrum variations occurred mainly in the co-polar antennas. The spectra of cross-polar antennas show variations over time that are not easily linked to the DNAPL position. We observed that the data collected 141 hours after the first DNAPL injection and two hours of water flow, show a pull-up of the reflection from the back of the cell and variations in the amplitude spectra of the traces located at the same position as the DNAPL injection. This suggests that the DNAPL probably remained trapped by sediments and was not totally removed by the water flow. Forward models, simulating the experiment, confirmed that the DNAPL induces a pull-up of the reflection from the back of cell and showed that in a controlled experiment the DNAPL produces a reflection whose amplitude depends on the DNAPL saturation. In a real case the presence of small amounts of DNAPL can be at best barely visible because of induced small amplitude reflections. This is truer if no GPR data are available from before the DNAPL spill, so there is little chance that GPR responses can be positively attributed to DNAPL presence

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Section: Contents Of the Tankmentioning

confidence: 99%

Time‐lapse monitoring of DNAPL in a controlled cell

Orlando

Renzi

2013

Near Surface Geophysics

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“…In fact, driver-less technology began to be used in underground mines around 2015. In 2011, Benter, Antolovich and Moore [38] were the first to argue that the mining process is moving in the direction of driver-less on the 2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Conference. In the same year, Meech and Parreira [39] begun to explore the possibility of driver-less applications in mines and developed the simulation models.…”

Section: Retrospective: Driver-less Technology In the Underground Transportationmentioning

confidence: 99%

Engineering Project: The Method to Solve Practical Problems for the Monitoring and Control of Driver-Less Electric Transport Vehicles in the Underground Mines

Wang

et al. 2021

WEVJ

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With the continuous development of Artificial Intelligence technology and Internet of Things engineering, more and more driver-less vehicles have been developed and put into industrial production. The birth of driver-less vehicles undoubtedly brings new vitality to a large amount of industries, particularly in transportation. For the mining industry, transportation is undoubtedly an extremely important link in the whole production process. If the driver-less vehicles can be applied to the underground mines, it can not only improve the production and transportation capacity of the whole mine but also can reduce the occurrence of many mine safety accidents. ZigBee WSN technology can play a greater role in the narrow environment such as underground mines according to the relevant literature; this concept paper, similar to an engineering project plan, mainly tries to integrate the ZigBee WSN technology and the communication-based train control (CBTC) system to explore the possibility of the driver-less vehicles to be used in the underground mines, which aims to solve practical engineering problems for the engineering projects. As the mining engineers, we put forward the concept of this integrated system in this concept paper, but we need to continue to work hard for the future of the underground mines. This concept paper serves as a guide to Tossing out a brick to get a jade gem, and it has a few implications for the development of underground mine transportation.

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“…Measuring Q over seismic data was proposed by (Quan 1997) using the centroid frequency downshift. The authors have previously shown frequency downshift as a method of detecting solid fragments in small rubble samples (Benter et al 2011). The centroid of the frequency spectrum for the source wave f s and receive wave f r is determined as: …”

Section: Quality Factor – Qmentioning

confidence: 99%

GPR signal attenuation through fragmented rock

Benter¹,

Moore²,

Antolovich³

2016

Mining Technology

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This paper presents results on detecting large rock fragments in rock piles using ground penetrating radar (GPR). The authors are researching sensors to augment the image provided to the remote operator, assisting with detection of oversized fragments beneath the surface. The attenuation of the GPR signal was calculated over the band 0-3 GHz from the signal energy in the frequency domain. The results show that attenuation measurement allowed the samples which included a large fragment to be differentiated from samples only containing smaller rock fragments. By combining velocity analysis with attenuation the rock samples can be further differentiated from samples containing air pockets or irregular surfaces. The combination of attenuation and signal velocity allowed prediction rates to detect the presence of large rock fragments over 93% correctly in laboratory testing.

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Determining bulk density of mine rock piles using ground penetrating radar frequency downshift

Cited by 5 publications

References 11 publications

Time‐lapse monitoring of DNAPL in a controlled cell

Time‐lapse monitoring of DNAPL in a controlled cell

Engineering Project: The Method to Solve Practical Problems for the Monitoring and Control of Driver-Less Electric Transport Vehicles in the Underground Mines

GPR signal attenuation through fragmented rock

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