Rock Mass Characteristics and Tomographic Data

Vatcher, Jessica; McKinnon, Stephen D.; Sjöberg, Jonny

doi:10.1007/s00603-018-1428-y

Cited by 6 publications

(4 citation statements)

References 15 publications

(15 reference statements)

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“…Alternatively, passive tomography can display the velocity distribution using mining-induced seismicity. As a result, the geomechanical characteristics of the rock mass can be identified [21], and stress anomalies can be evaluated [17][18][19]22]. However, the relationship between stress and seismic wave velocity in the coal-rock configuration, as well as the detailed passive tomography procedures, is still ambiguous and rarely studied in the existing literature.…”

Section: Introductionmentioning

confidence: 99%

Using Elastic Wave Velocity Anomaly to Predict Rockburst Hazard in Coal Mines

2023

Archives of Mining Sciences

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For the prevention and control of rockburst in underground coal mines, a detailed assessment of a rockburst hazard area is crucial. in this study, the dependence between stress and elastic wave velocity of axially-loaded coal and rock samples was tested in a laboratory. The results show that P-wave velocity in coal and rock is positively related to axial stress and can be expressed by a power function. The relationship showed that high stress and a potential rockburst area in coal mines can be determined by the elastic wave velocity anomaly assessment with passive seismic velocity tomography. The principle and implementation procedure of passive seismic velocity tomography for elastic wave velocity were introduced, and the assessment model of rockburst hazard using elastic wave velocity anomaly was built. A case study of a deep longwall panel affected by rockbursts was introduced to demonstrate the effectiveness of tomography. The rockburst prediction results by passive velocity tomography closely match the dynamic phenomenon in the field, which indicates the feasibility of elastic wave velocity anomaly for rockburst hazard prediction in coal mines.

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Section: Introductionmentioning

confidence: 99%

Using Elastic Wave Velocity Anomaly to Predict Rockburst Hazard in Coal Mines

2023

Archives of Mining Sciences

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“…Passive seismic tomography, a seismic imaging method using mininginduced seismicity to infer the velocity of structures through which waves propagate, plays an increasingly important role in stress distribution and mitigating seismic hazards as mines increase their use of seismic monitoring systems (Young and Maxwell 1992;Meglis et al 2005;Baig et al 2017). Studies in seismic imaging have validated that a passive seismic tomography is a useful tool for examining stress distribution and perturbation around mining (Luxbacher et al 2008;Ma et al 2016;Westman et al 2017;Vatcher et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Passive Seismic Imaging of Stress Evolution with Mining-Induced Seismicity at Hard-Rock Deep Mines

Westman

Counter

et al. 2020

Rock Mech Rock Eng

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This work aims to examine the stress redistribution with evolving seismicity rates using a passive seismic tomographic tool. We compiled a total of 26,000 events from two underground mines and partitioned them into multiple clusters in a temporal sequence, each of which contains 1000 events. To image stress redistribution associated with seismicity rates, we then run the tomographic studies using each cluster to yield seismic tomograms and computed the corresponding seismicity rate. We found that high velocity anomalies grew with the increase of seismicity rates, and they switched to a shrinking tendency under low seismicity rates. Results of this study imply that seismicity rates increase with increasing stress concentration and decrease with decreasing stress concentration. This study highlights the value of utilizing passive seismic tomography for estimating stress evolution associated with the change of seismicity rates at underground mines. Our findings illuminate the applications of using mining-induced seismicity to assess stress redistribution associated with seismicity rates at hard-rock mines, providing insights into seismic hazards for deep mining.

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“…However, due to extra labor and economic cost, the application of active velocity tomography is limited to some extent. Alternatively, passive seismic velocity tomography can rapidly and continuously present the stress redistribution during coal mining by using mining-induced seismicity as the sources seismic wave [23][24][25][26][27]. Passive seismic velocity tomography in existing literatures was mainly used to represent stress redistribution.…”

Section: Introductionmentioning

confidence: 99%

Study of Rock Burst Risk Evolution in Front of Deep Longwall Panel Based on Passive Seismic Velocity Tomography

Zhou

Gong

et al. 2020

Geofluids

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Monitoring and early-warning are critical for the prevention and controlling of rock burst in deep coal mining. In this study, rock burst risk assessment criterion was built based on the correlativity between seismic velocity and stress state in coal and rock body. Passive seismic velocity tomography using mining-induced seismic waves was conducted regularly and continuously. The evolution of rock burst risk and range in front of a deep longwall panel with folds and adjoining goaf was determined. The influence of pressure-relief measures on rock burst risk was analyzed. The study results indicate that burst risk level and range during panel retreating increase first and then decrease, the peak is reached when it is located at 1# syncline shaft area. When approaching the crossheading, high burst risk zones distribute along the crossheading and further intersect with those in 1# syncline shaft area. Burst risk zones in the inclination of panel show distinct zoning features. Tomography results are in good agreement with the drilling bit result, rock burst occurrence, microseismic activity, and working resistance of hydraulic supports. Pressure-relief measures and mining layout have a distinct influence on burst risk of longwall panel. For prevention and controlling of rock burst risk in deep coal mining, pressure-relief measures should be optimized based on passive tomography results.

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Rock Mass Characteristics and Tomographic Data

Cited by 6 publications

References 15 publications

Using Elastic Wave Velocity Anomaly to Predict Rockburst Hazard in Coal Mines

Using Elastic Wave Velocity Anomaly to Predict Rockburst Hazard in Coal Mines

Passive Seismic Imaging of Stress Evolution with Mining-Induced Seismicity at Hard-Rock Deep Mines

Study of Rock Burst Risk Evolution in Front of Deep Longwall Panel Based on Passive Seismic Velocity Tomography

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