Quantitative analysis of seismic velocity tomography in rock burst hazard assessment

Cai, Wu; Li, Dou; Gong, Siyuan; Li, Zhenlei; Yuan, Shuyun

doi:10.1007/s11069-014-1443-6

Cited by 67 publications

(31 citation statements)

References 29 publications

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“…However, complex geological setting and mining activities make it extremely difficult to obtain the in situ stress field in time and space. To eradicate this problem, many researchers have studied the P-wave tomography for evaluating the high stress in coal mines [34][35][36].…”

Section: Stress Distribution: a Seismic Computed Tomographymentioning

confidence: 99%

Investigation into Mechanism of Floor Dynamic Rupture by Evolution Characteristics of Stress and Mine Tremors: A Case Study in Guojiahe Coal Mine, China

Liu

Javed

Gong

et al. 2018

Shock and Vibration

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In order to explore the mechanism of floor dynamic rupture, the current study adopts a thin plate model to further investigate the condition of floor failure. One of the possible explanations could be floor buckling due to high horizontal stress and dynamic disturbance ultimately leading to rapid and massive release of elastic energy thus inducing dynamic rupture. Seismic computed tomography and 3D location were employed to explore the evolution characteristics of floor stress distribution and positions of mine tremors. In the regions of floor dynamic rupture, higher P-wave velocity was recorded prior to the dynamic rupture. On the contrary, relatively lower reading was observed after the dynamic rupture thus depicting a high stress concentration condition. Meanwhile, evolution of mine tremors revealed the accumulation and subsequent release of energy during the dynamic rupture process. It was further revealed that dynamic rupture was induced due to the superposition of static and dynamic stresses: (i) the high static stress concentration due to frontal and lateral abutment stress from coal pillar and (ii) dynamic stress from the fracture and caving of coal pillar, hard roof, and key stratum. In the later part of this study, the floor dynamic rupture occurrence process would be reproduced through numerical simulations within a 0.6 sec time frame. The above-mentioned findings would be used to propose a feasible mechanism for prewarning and prevention of floor dynamic rupture using seismic computed tomography and mine tremors 3D location.

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Section: Stress Distribution: a Seismic Computed Tomographymentioning

confidence: 99%

Investigation into Mechanism of Floor Dynamic Rupture by Evolution Characteristics of Stress and Mine Tremors: A Case Study in Guojiahe Coal Mine, China

Liu

Javed

Gong

et al. 2018

Shock and Vibration

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“…e mechanism of rockburst could be a base to effectively monitor and prevent the mine rockburst. From an initial record of the mine rockburst phenomenon to the present in the world, there was a history of 274 years [7][8][9][10][11], and during the period, "strength theory," "rigidity theory," "energy theory," "burst potential theory," "instability theory," and other theories were formed [12][13][14][15][16][17]. ose theories all revealed that the condition and principle of the mine rockburst occurred from different flanks and would play a due promotion role in the study on the mine rockburst.…”

Section: Introductionmentioning

confidence: 99%

A New Theoretical View of Rockburst and Its Engineering Application

Pan

Liu

Wang

et al. 2018

Advances in Civil Engineering

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Traditionally, rockburst is considered as a dynamic phenomenon of sudden destruction of coal/rock mass. In this study, rockburst is treated as an event process rather than a phenomenon. is paper introduces typical rockburst process, its classification, mechanism of internal and external causes, and energy criterion. Analysis indicates that rockburst is a dynamic process that includes three sequential phases: burst start-up, burst energy transfer, and rockburst pressure behavior. Excessive static stress concentration in the strata nearby the target zone appears to be the internal cause of rockburst start-up, while the external cause is the disturbance of the static stress concentration and additional load transfer by the concentrated dynamic load occurred at further distance. Potential burst start-up area is the highest stress concentration zone within the region where stress is in the critical equilibrium state. With the identified internal and external factors that contribute to rockburst start-up, it is concluded that the rockburst preventive measures should focus on the monitoring and controlling of originating source of static and dynamic stress concentrations. Field practice proves that the reunderstanding of rockburst and the derived preventive measures are feasible and successful.

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“…These techniques have been used extensively and successfully in the Earth Sciences to map characteristics of the Earth at great depths, for example, the identification of the Mohorovicic Discontinuity (Moho); see Rawlinson et al (2010) for a description of the history of tomographic techniques. To a lesser extent, these techniques have been applied in the mining environment, which is at a much smaller scale, where correlations between velocities and i) geomechanical characteristics of the rock mass (Cai et al 2014;Hemmati Nourani et al 2017;Watanabe and Sassa 1996), and ii) stress anomalies (Cao et al 2015;Friedel et al 1995Friedel et al , 1997He et al 2011;Hosseini et al 2013;Krauß et al 2014;Luxbacher et al 2008;Ma et al 2016;Young and Maxwell 1992) are evaluated. Much of this work was conducted in soft rock environments (coal mines).…”

Section: Introductionmentioning

confidence: 99%