Scaling rockburst hazard using the DDA and GSI methods

Hatzor, Yossef H.; He, Ben‐Guo; Feng, Xia‐Ting

doi:10.1016/j.tust.2017.09.010

Cited by 44 publications

(9 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Step 4: Update the location and search velocity of particles according to Equation (8) and (9), and then go back to step (3).…”

Section: Of 21mentioning

confidence: 99%

“…Step 3: By Equation (5), the adaptive value of particles (MS source coordinates and velocity model) is calculated and is used to determine whether it meets the predetermined flight times and positioning accuracy, if so, proceed to step (5), otherwise (if not), to step (4). Step 4: Update the location and search velocity of particles according to Equation (8) and (9), and then go back to step (3).…”

Section: Monitoring Systemmentioning

confidence: 99%

“…Rockburst is an important geological sign of rock mass with high ground stress [5]. The phenomenon of rockburst is different due to the accumulation level of geostress, the characteristics of the rock and the shape of the underground engineering contour [6][7][8]. It is a kind of dynamic instability geological disaster in that the elastic strain energy of the surrounding rock can be released suddenly and produces burst release, exfoliation, ejection, and even throw in the rock mass caused by the brittle failure of the excavation unloading during or after the excavation of the underground engineering in the high stress zone [9,10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Spatiotemporal Distribution Law of Microseismic Events and Rockburst Characteristics of the Deeply Buried Tunnel Group

Zhang

Chen

et al. 2018

Energies

View full text Add to dashboard Cite

Rockburst disaster is one of the prominent problems faced by deep underground engineering. Microseismic (MS) monitoring techniques can be used to warn of rockburst in tunnels to provide scientific basis for rock burst prevention and control measures. Described in this paper, is an MS monitoring system based on MS source location with hierarchical strategy implemented in the tunnel group of the Jinping II hydropower station in Sichuan Province, China. The spatiotemporal distribution of MS events was analyzed in the construction process and the size effect of rockburst risk discussed by statistical analysis and numerical calculation of rockburst in seven tunnels. The results show that the active period of microseisms and the high-incidence period of rockburst are within 1.5 h after the rock disturbance. The MS events within 1D from the tunnel wall are the most intensive and are mainly concentrated near the heading face, the side wall, and the left spandrel. At the construction site, the accuracy rate of rockburst prediction is 61.8%, of which the accuracy rate of the medium and strong rockburst is 80.3%. Based on field statistics of rockburst, the increase of the tunnel excavation section size can reduce the rockburst strength to a certain extent, which is consistent with the numerical simulation results.

show abstract

“…Step 4: Update the location and search velocity of particles according to Equation (8) and (9), and then go back to step (3).…”

Section: Of 21mentioning

confidence: 99%

Section: Monitoring Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Spatiotemporal Distribution Law of Microseismic Events and Rockburst Characteristics of the Deeply Buried Tunnel Group

Zhang

Chen

et al. 2018

Energies

View full text Add to dashboard Cite

show abstract

“…The characteristics of rocks, the magnitude of geositu stress, and the shape of underground engineering will make the phenomena of rockburst different [23,24]. It is a kind of phenomenon that the accumulated elastic deformation potential energy in rock mass suddenly and violently releases under certain conditions, like during or after the excavation of the underground engineering in the high geostress zone, resulting in exfoliation, even the ejection and throw of rock mass [25,26]. Rockburst not only brought great challenges to the construction and advancement of the project, but also seriously threatened the safety of construction personnel and caused huge economic losses.…”

Section: Introductionmentioning

confidence: 99%

The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel

et al. 2019

View full text Add to dashboard Cite

Rockburst hazards induced by high geostress are particularly prominent during the construction of underground engineering. Prevention and control of rockburst is still a global challenge in the field of geotechnical engineering, which is of great significance. Based on the tunnel group of the Jinping II hydropower station of China, this paper analyzed the mechanical principle of support in the process of construction, and discussed in detail the active release and passive support by numerical simulation and field application. The results show that as two active measures, stress relieve holes and advanced stress relief blasting can release the energy of the microseismic source and transfer the high stress to the deeper surrounding rock, make the surface rock wall with a relatively low stress act as a protective barrier. Their stress release rate is about 12% and 33% in this project, respectively. In term of passive measure, the combined rapid support, which is mainly composed of water swelling anchor and nano-admixture shotcrete, is also an effective way to prevent and control the rockburst under high geostress.

show abstract

“…Ever since the first recorded rockburst occurred in England in 1738, rockburst events have been reported in all coal-mining countries. Numerous researchers across the world have investigated rockbursts [2][3][4][5][6][7] and concluded that most rockbursts (approximate 85%) take place in roadways because of being disturbed by an external hypocentre, and dynamic damages to surrounding rocks of roadways appear under conditions superposing static and dynamic loads [8,9].…”

Section: Introductionmentioning

confidence: 99%

Mechanism Analysis of Roadway Rockbursts Induced by Dynamic Mining Loading and Its Application

Wang

2018

Energies

View full text Add to dashboard Cite

Roadway rockbursts seriously restrict the safety production of coal mines; however, the interaction between dynamic loads and roadway surrounding rocks has not been fully considered in existing studies. A dynamic failure analysis model of anchoring supporting structures was established to analyze dynamic effects of stress waves. Taking a rockburst in LW402103 of the Hujiahe coal mine as the case, the theoretical model was well applied and verified. The static cumulative resistance Qs (210.5 kN) which was incurred by deformation of rocks provided the basis (81.93% in the overall real-time resistance Q) of dynamic failures. However, the additional impact resistance Qd (46.43 kN) brought about by the energy release in the failure process of elastic zones triggered impact failures. As a result, under conditions that the overall real-time resistance Q (256.93 kN) exceeded the ultimate resistance [Q] (250.8 kN), the dynamic failure of supports occurred. The in situ application was implemented by taking pressure-relief measures and parameter optimizations of roadway supports, which achieved an effective prevention of rockbursts.

show abstract

Scaling rockburst hazard using the DDA and GSI methods

Cited by 44 publications

References 34 publications

The Spatiotemporal Distribution Law of Microseismic Events and Rockburst Characteristics of the Deeply Buried Tunnel Group

The Spatiotemporal Distribution Law of Microseismic Events and Rockburst Characteristics of the Deeply Buried Tunnel Group

The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel

Mechanism Analysis of Roadway Rockbursts Induced by Dynamic Mining Loading and Its Application

Contact Info

Product

Resources

About