Efficient mine microseismic monitoring

Ge, Mao Chen

doi:10.1016/j.coal.2005.03.004

Cited by 205 publications

(80 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the border region of mined-out cavities, induced Coulomb stress changes lead to a large number of brittle failure events, sometimes expressed as rockfalls or rockbursts (e.g., Gibowicz and Kijko, 1994;Richardson and Jordan, 2002). These events are termed "border fractures" in this paper and pose a considerable risk to life and property (e.g., Young et al, 1992;Ge, 2005). Most of the microseismic (MS) and acoustic emission (AE) events observed in the mining environment are linked to such failure processes in the excavation damage zone close to the cavities, as well as in the regions in the immediate vicinity of cavities (e.g., Gibowicz and Kijko, 1994;Richardson and Jordan, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, monitoring programs to mitigate risks during the active mining process are carried out by the operators of the mine (e.g., Gibowicz, 1989;Gibowicz and Kijko, 1994;Trifu, 2002;Trifu, 2010). The aim of this monitoring is to identify regions that may be susceptible to rockbursts or structural damage (e.g., Young et al, 1992;Ge, 2005) or to decide when a safe re-entry to the mine is possible after a rockburst or larger event (e.g., Vallejos and McKinnon, 2011).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Macroscopic Failure Processes at Mines Revealed by Acoustic Emission (AE) Monitoring

Cailleau¹,

Kaiser²,

Dahm³

2014

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

Mining activity may cause different types of seismicity and rock failure.Typical events include (1) fully induced microearthquakes in close proximity to galleries and human activity due to high-stress concentrations (border fractures) and (2) triggered earthquakes within the rock mass at larger distance to the source of the stress perturbation (inner fractures). Type 1 is important to understand the development of rock bursts and evaluate the stability of the mine. Type 2 may be associated with larger events releasing pre-existing stress and being triggered by stress changes due to the mining operation. They are important to assess the seismic hazard related to mining activity.To analyze these different failure processes, we use a dataset of high-frequency acoustic emission (AE) events monitored in an abandoned salt mine. The process of fracture formation in the rock mass was enhanced by the backfilling of a cavity. Thermal stresses induced by the backfilling operation are modeled with a finite-element approach, and observed AE activity is used to quantify the mechanism of event triggering in terms of a Coulomb failure model.Two observations are outstanding. First, the instantaneous triggering of enhanced activity and the slow growth of an inner fracture in relatively far distance to the backfilled cavity is detected. The structure already showed AE activity before the refilling started and was triggered by traction-like stress transfer. Its AE activity correlates well with the calculated Coulomb stress changes at the beginning of backfilling. Second, the sudden occurrence of a macroscopic, induced border fracture at the backfilled gallery which is oriented in agreement with the acting stress field is observed. Although AE activity at the inner fracture was triggered by tiny Coulomb stress changes, indicating a structure already in critical state, formation of the border fracture required significantly larger stresses, hinting at a previously intact rock volume.Online Material: Figure depicting the variability of the static Coulomb stress changes on the inner fracture for different rake values.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Macroscopic Failure Processes at Mines Revealed by Acoustic Emission (AE) Monitoring

Cailleau¹,

Kaiser²,

Dahm³

2014

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

show abstract

“…It is widely used in the continuous real-time monitoring of the occurrence, development, and evolution of micro fractures in the rock mass [10][11][12][13]. Xu et al [14,15] proposed a rock mass damage evolutional model based on microseismic data and conducted a feedback analysis of the left bank slope stability combined with a 3D finite element method (FEM) model.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Surrounding Rock Failure and Crack Evolution Rules in Branched Pillar Recovery

Yang

Zhou

et al. 2017

Minerals

View full text Add to dashboard Cite

Abstract:To study the mechanism of surface collapse and crack evolution in a roadway chain failure process in the pillar recovery of Hongling lead zinc ore in Inner Mongolia Province, China, microseismic monitoring technology, moment tensor theory, and numerical simulation are used for the inversion of rock mass fracturing, the destruction type classification of crack, and the mechanism of surrounding rock. Research shows the following: (1) the rock mass fracturing is first produced within the +955 m level, before extending through the hanging wall to the ground surface. Then, many shear failures occur in the ground surface of the footwall, extending downwards in an arc-shaped path to the +905 m level. Finally, the surface gradually collapses with large-scale shear failures. (2) The mechanism of surface collapse is as follows: after the recovery of pillars in the +905 m level, tensile cracks generated in the top of orebody #2 extend upwards and obliquely. Analogously, shear cracks are generated in the top of orebody #1, extending upwards. After the recovery of pillars in the +855 m level, the marble interlayer is destroyed and sinks, and many tensile cracks and shear cracks exist and incise in the ground surface, which cause the ground surface to collapse. (3) The mechanism of crack evolution is as follows: after the recovery of 5107 pillars, the footwall haul road in the +905 m level was damaged and collapsed by the cut-through cracks. Those cracks then continue to extend upwards and converge with the slanting shear cracks in the +905 m level, which form a triangular failure in the footwall rock. Finally, the failure causes the tensile and shearing cracks in the haulage way of the +955 m level to extend and connect, which forms the haulage way chain failure.

show abstract

“…With the significant advantages, microseismic monitoring technique has been widely used in many projects and achieved remarkable achievements, such as deep mines, tunnels, slope and underground laboratory at South Africa, Canada, the United States and China [1][2][3][4][5][6][7]. Jianpo Liu et al [8] established microseismic monitoring system in Hongtou Mountain Copper Mine to study the relationship between microseismic activities and mining.…”

Section: Introductionmentioning

confidence: 99%

Research on Temperal-spatial Characteristics of Microseismic Activity in Hard Rock Tunnel at Baihetan Hydropower Station

Liu¹,

Chen²,

Xiao³

2017

Proceedings of the 2017 2nd International Symposium on Advances in Electrical, Electronics and Computer Engineering (ISAEECE 20

View full text Add to dashboard Cite

Abstract. The underground cavern group of Baihetan hydropower station is characteristic with complex geological condition, large buried depth and high stress, the local failures of surrounding rock mass which often occurred frequently during the construction process. To study the mechanisms of failures result from the unloading effect of excavation, in situ microseismic monitoring system was established on the No.1 construction branch tunnel of spillway tunnel located on the left bank of Baihetan Hydropower Station, the relation between microseismic activity, geological condition and failures of surrounding rock is studied. The results show that ： 1) the region with abundant underground water was hard to gather stress and energy quickly in short time. 2) a low excavation rate weakened the risk of the failure of the surrounding rock of hard rock tunnel because of the unload effect of excavation. 3) the microseismic events were more active on north side of the tunnel and assembled on the north spandrel with opening structure plane.4) the risk of rockburst in the microseismic monitoring tunnel during the excavation is low. The research results provide reference for the optimization of the excavation and support and are meaningful for reducing the risk of the rock failures during the excavation.

show abstract

Efficient mine microseismic monitoring

Cited by 205 publications

References 4 publications

Macroscopic Failure Processes at Mines Revealed by Acoustic Emission (AE) Monitoring

Macroscopic Failure Processes at Mines Revealed by Acoustic Emission (AE) Monitoring

Mechanism of Surrounding Rock Failure and Crack Evolution Rules in Branched Pillar Recovery

Research on Temperal-spatial Characteristics of Microseismic Activity in Hard Rock Tunnel at Baihetan Hydropower Station

Contact Info

Product

Resources

About