In-situ and experimental investigations of rockburst precursor and prevention induced by fault slip

Lu, Cai‐Ping; Yang, Liu; Zhang, Nong; Zhao, Tianfeng; Wang, Hongyu

doi:10.1016/j.ijrmms.2018.06.002

Cited by 67 publications

(28 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Li et al [19] studied the influence of different dip angles of reverse faults on stope rock burst. Lu et al [20] studied the precursory law of rock burst induced by fault sliding. Zhu et al [21] studied the rock burst mechanism of fault slip and instability when mining in isolated working faces near faults.…”

Section: Introductionmentioning

confidence: 99%

Rock Burst Mechanism under Coupling Action of Working Face Square and Regional Tectonic Stress

Zhu

Jiang

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

With the development of faults in many coalfields, many large faults will form a relatively independent area, forming regional tectonic stress concentration. Under the influence of mining, it is easy to induce fault activation, produce mine tremor, and then induce rock burst. Through field investigation, theoretical analysis, numerical simulation, and engineering verification, the overburden movement model of No. 3504 working face square and fault activation in Liangbaosi Coal Mine was established. The stress variation and energy release law of working face advance and fault area were analyzed, and the mechanism of rock burst under the coupling action of working face square and regional tectonic stress was revealed. The results show that the regional stress adjustment and fault activation are caused by the large-scale overall movement of overburden during the working face square, and there is a peak value of elastic energy release during the fault activation, which is easy to produce large energy mine earthquake. The energy level of the daily maximum energy event is higher than that of the initial mining stage in the square period, and the location of on-site large energy microseismic event is basically consistent with the predicted fault strike. The study provides a theoretical basis for the prevention and control of rock burst during the working face square under the condition of regional tectonic stress.

show abstract

Section: Introductionmentioning

confidence: 99%

Rock Burst Mechanism under Coupling Action of Working Face Square and Regional Tectonic Stress

Zhu

Jiang

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…With the underground engineering developing to the deeper crustal areas, rockburst phenomena appear with a growing trend which pose a vast risk to mining operations and result in production losses [1][2][3][4][5][6][7]. Hence, scholars in mounting number begin to focus on rockburst problems [8][9][10][11][12][13], and the rockburst proneness turned into one of the vital research sites [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Specimen Shape on Rockburst Proneness of Red Sandstone

Yang

Gong

Liu

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

To investigate the specimen shape effect on rockburst proneness of rock materials, a string of conventional and single-cycle loading-unloading uniaxial compression tests was performed with cylindrical and cuboid red sandstone specimens. Despite similar development paths on stress-strain curves for the specimens with two shapes, the cuboid specimens generally show a higher uniaxial compressive strength than the cylindrical specimens. The energy evolution laws inside the two shaped specimens were explored. The results show that the input energy density (IED), elastic energy density (EED), and dissipated energy density (DED) of the two shaped specimens increased in a quadratic relationship with the increment of unloading level. Moreover, the linear relationships between the EED, DED, and IED were further confirmed for two shaped specimens, which were defined as the linear energy storage and dissipation laws, respectively. The energy storage coefficients and energy dissipation coefficients (the slopes of the linear relationships between the EED, DED, and IED, respectively) are almost independent of the specimen shape. According to the linear energy storage and dissipation laws, the peak EED and peak DED of every specimen can be calculated accurately. Finally, combining the failure process of rock specimens recorded by a high-speed camera, the elastic energy index (WET), the residual elastic energy index (AEF), and the far-field ejection mass ratio (MF) of each specimen were adopted to assess the rockburst proneness of the red sandstone sampled in cylindrical and cuboid. The results show that cuboid specimens exhibited stronger rockburst proneness than cylindrical ones, which favorably agreed with the actual failure phenomena.

show abstract

“…The failure and instability mechanisms of compound coal‐rock structures with discontinuities have been widely investigated, and frictional slip along discontinuities, especially faults, can directly result in dynamic phenomena, such as rock bursts at the microscale and earthquakes at the macro‐scale . Frictional slip along a discontinuity is controlled by fault strength, normal stress to the discontinuity and shear stress along the discontinuity, as well as the stress distribution and frictional property of the discontinuity, which may relate to the Mohr‐Coulomb theory .…”

Section: Introductionmentioning

confidence: 99%

“…Energy dissipation and crack development reveals the state change of materials. To investigate the deformation and fracture processes of coal and rock, acoustic emission (AE) and microseism (MS) were typically adopted to track coal/rock fractures in underground mining . On the one hand, AE/MS can chronicle the evolution of cracks, reflecting the distribution and characteristics of stress .…”

Section: Introductionmentioning

confidence: 99%

Slip and instability mechanisms of coal‐rock parting‐coal structure (CRCS) under coupled dynamic and static loading

Liu

et al. 2019

Energy Science & Engineering

Self Cite

View full text Add to dashboard Cite

The slip and instability mechanisms of coal‐rock parting‐coal structure (CRCS) under coupled dynamic and static loading were investigated using theoretical analysis and numerical simulations, and the fracture and instability processes were described by monitoring the displacement, strain, and acoustic emissions (AEs) of coal and rock parting blocks. Based on the parameters of dynamic load, three different effects on slip and instability characteristics of CRCS were presented, and the effect mechanisms of static stress, as well as amplitude and frequency of dynamic stress wave, were analyzed in detail. Finally, the direct effect on the slip and instability strength of CRCS and the frequency range of dynamic load for generating synchronous slip along two discontinuities sandwiched between coal and rock parting blocks were discussed. This work is relevant for early warning coal‐rock dynamic disasters that are triggered by the slip and fracture instability of CRCS under coupled dynamic and static loading in coal mines.

show abstract

In-situ and experimental investigations of rockburst precursor and prevention induced by fault slip

Cited by 67 publications

References 35 publications

Rock Burst Mechanism under Coupling Action of Working Face Square and Regional Tectonic Stress

Rock Burst Mechanism under Coupling Action of Working Face Square and Regional Tectonic Stress

Experimental Study on the Influence of Specimen Shape on Rockburst Proneness of Red Sandstone

Slip and instability mechanisms of coal‐rock parting‐coal structure (CRCS) under coupled dynamic and static loading

Contact Info

Product

Resources

About