scholarly journals Application of probabilistic clustering analysis to rockburst hazard assessment of rock mass

2021 ◽  
Vol 773 (1) ◽  
pp. 012061
Author(s):  
AV Gladyr ◽  
AA Tereshkin ◽  
MI Rasskazov ◽  
AV Konstantinov
Keyword(s):  
Rock Mass ◽  
Hazard Assessment ◽  
Clustering Analysis ◽  
Rockburst Hazard ◽  
Probabilistic Clustering

Rockburst-hazard criterion of rock mass

1999 ◽  
Vol 35 (6) ◽  
pp. 598-601 ◽  
Author(s):  
A. A. Yeryomenko ◽  
A. P. Gaidin ◽  
V. A. Vaganova ◽  
V. A. Yeryomenko
Keyword(s):  
Rock Mass ◽  
Rockburst Hazard

scholarly journals Rockburst hazard assessment based on seismic tomography and analytical modelling - a case study

2018 ◽  
Vol 66 ◽  
pp. 01009
Author(s):  
Dariusz Chlebowski ◽  
Zbigniew Burtan
Keyword(s):  
Hazard Assessment ◽  
Seismic Tomography ◽  
Vertical Component ◽  
Rockburst Hazard ◽  
Expert Opinions ◽  
Deformable Media ◽  
Coal Deposits ◽  
Threat Level ◽  
Survey Results

In accordance with the formal regulations currently in force in Poland, the criteria for rockburst hazard assessment with respect to coal deposits include the records of seismic events and their impacts, de-stressing of the entire seam or its parts and expert opinions of mine operation engineers. Effectiveness of the de-stressing can be verified by geophysical test data whilst the expert opinions are mostly based on mathematical modelling using specialist software or dedicated simulation algorithms. This study collates and synthesises the results of tests carried out in a seam section in a colliery within the Upper Silesia Coal Basin, obtained by the outlined methods. Geophysical survey results are interpreted basing on seismic tomography procedures utilising the geo-tomography techniques for velocity field reconstruction in data processing. For comparison, the stress state modelling data are provided, based on conventional engineering solutions applicable to mechanics of deformable media. The actual assessment of the rockburst threat level is based on observations of distributions of the longitudinal wave velocity in relation to the actual value of the vertical component of stress concentration within the coal seam.

scholarly journals Estimating the rockburst hazard of hard rocks based on laboratory test results

2019 ◽  
Vol 129 ◽  
pp. 01008
Author(s):  
Iuliia Fedotoval ◽  
Nikolay Kuznetcov ◽  
Eduard Kasparyan
Keyword(s):  
Rock Mass ◽  
Rock Fracture ◽  
Standard Test ◽  
Standard Equipment ◽  
Rock Classification ◽  
Rockburst Hazard ◽  
Hazard Degree ◽  
Laboratory Test Results ◽  
Dynamic Fractures ◽  
Deformation Patterns

The results of laboratory tests of samples are used to estimate rock proneness to dynamic fractures, in particular, by brittleness index. A common drawback of the approaches in use is that they do not expressly consider the main condition of dynamic rock fracture – rock mass ability to accumulate energy when loaded. The article discusses the results of studies of the nature of elastic energy accumulation during loading and deformation of samples of various rocks under uniaxial compression in order to assess the degree of their explosion. The approach is original as it studies the deformation curve of rocks at the pre-peak stage that may be obtained with any standard equipment without the use of special-purpose test (“rigid”) devices. Results of the studies conducted on standard test devices have allowed us to identify two different deformation patterns for the rock type tested with further establishment of criteria of rock classification by the degree of proneness to dynamic fractures. This approach is of practical value as it specifies the geomechanics zoning method of the rock mass and improves the assessment of rockburst hazard degree of specific areas at deposits being developed.

scholarly journals Rockfall Investigation and Hazard Assessment from Nang County to Jiacha County in Tibet

2019 ◽  
Vol 10 (1) ◽  
pp. 247 ◽  
Author(s):  
Haiyang Liu ◽  
Xueliang Wang ◽  
Xiaohui Liao ◽  
Juanjuan Sun ◽  
Su Zhang
Keyword(s):  
Rock Mass ◽  
Hazard Assessment ◽  
Cloud Model ◽  
Rapid Development ◽  
Slope Angle ◽  
Project Planning ◽  
Aerial Images ◽  
Slope Aspect ◽  
Human Engineering ◽  
Rockfall Hazard

The influences of rockfall on human engineering have been increasing in Tibet with the rapid development of the western region of China. This study proposed a multi-approach to carry out rockfall investigation and hazard assessment. As a case study, the rockfall hazard from Nang County to Jiacha County in Tibet was assessed. Firstly, we summarized the characteristics of spatial distributions of typical rockfall sources using Digital Elevation Model (DEM) and unmanned aerial vehicle (UAV) aerial images with resolution of 10 m. According to the thresholds of slope angle, slope aspect and elevation distribution of typical rockfall sources, we obtained all of the rockfall source areas in study area semi-automatically in ArcGIS platform. Secondly, we improved the efficiency and accuracy of detailed field investigation by using a three-dimensional (3D) point cloud model and rock mass structure extraction software. According to the analysis result, the dominant joint set was J1, whose orientation was basically consistent with the Yarlung Tsangpo Fault. The combination of J1, J2 and J4 cut the rock mass into blocks of wedge with J1 as potential sliding planes. It was indicated that the stability of the rock mass in study area was mainly controlled by the characters of joint sets. Finally, we applied the improved reclassification criteria of the Rockfall Hazard Vector (RHV) method in rockfall hazard assessment according to protection capabilities of the current protection facilities, making the result more valuable for geohazards prevention work. Based on this multi-approach, we obtained that 10.92% of the 306 provincial highway and 9.38% of the power line were threatened by potential rockfall hazards in study area. The hazard assessment results of study area were also of certain guiding value to the linear project planning and geohazards prevention work.

Use of Microseismic Source Parameters for Rockburst Hazard Assessment

1998 ◽  
Vol 153 (1) ◽  
pp. 41-65 ◽  
Author(s):  
J. M. Alcott ◽  
P. K. Kaiser ◽  
B. P. Simser
Keyword(s):  
Hazard Assessment ◽  
Source Parameters ◽  
Rockburst Hazard

scholarly journals Investigating the variation of the fields of elastic stresses in the rock mass when developing the Peschanskoye deposit

2020 ◽  
pp. 19-28
Author(s):  
Lipin Iakov ◽  
◽  
Sentiabov Sergei ◽  
Krinitsyn Roman ◽  
◽  
...  
Keyword(s):  
Rock Mass ◽  
Stress State ◽  
Rock Burst ◽  
Extreme Values ◽  
Rockburst Hazard ◽  
Elastic Stresses ◽  
Ore Bodies ◽  
Study Parameter ◽  
State Variation ◽  
The Impact

Research aim is to study parameter variations in the stress state of the rock mass to ensure safe and efficient mining of the Peschanskoye magnetite deposit (Northern Ural) to the full depth, which has been carried out by Severopeschanskaya mine since 1958 in a complex of hard rock at a depth of 200 to 700 m. Blind, thick, and steep ore bodies are developed by a block-caving method with ore breaking to a clamped medium. From a depth of 400 m, the field is classified as rock burst hazardous. The first rock burst was recorded in 1981 at a depth of 450 m. Research methodology includes full-scale experimental measurements of the rock and ore mass stress state at accessible depths and horizons of the deposit, establishing patterns of stress growth with depth, as well as long-term (since 1990) geo-deformational monitoring of an untouched rock mass stress level in time. Research results analysis has allowed to establish the patterns in stress-strain state changes during mining. Gradients of gravitational and tectonic stresses growth with depth are determined. Alternating (astrophysical) stresses are highlighted in a special line, the extreme values of which are linked chronologically with various information factors. Conclusions. The determined values of rock mass natural stress state variation parameters in combination with the established stresses around the workings and goafs (technogenic impact) make it possible to take into account the main tempo-spatial factors of the impact made by the mentioned loads when selecting rockburst-safe and effective mining parameters for underground geotechnology both at the top horizons when applying controlled collapse of overlying blind deposits and in the prevention of rockburst hazard in the lower horizons of the developed field

Rockfall Hazard Assessment on Wangxia Rock Mass in Wushan (Chongqing, China)

2017 ◽  
Vol 35 (4) ◽  
pp. 1895-1905 ◽  
Author(s):  
Shang-qu Sun ◽  
Li-ping Li ◽  
Shu-cai Li ◽  
Qian-qing Zhang ◽  
Cong Hu
Keyword(s):  
Rock Mass ◽  
Hazard Assessment ◽  
Rockfall Hazard

scholarly journals Development of multi-channel portable impact control device for local assessment of the state of the edge parts of the rock massif

2018 ◽  
Vol 56 ◽  
pp. 02024
Author(s):  
Alexander Konstantinov
Keyword(s):  
Operating System ◽  
Acoustic Emission ◽  
Rock Mass ◽  
Software Development ◽  
Local Control ◽  
Hazard Assessment ◽  
Control Device ◽  
New Approach ◽  
Wireless Technologies ◽  
Software And Hardware

The improvement directions of geoacoustic methods and software and hardware used for local rock mass impact hazard assessment are proposed in the article, in particular, comparison is made with the successfully proven Prognoz L device. Three main directions for its modernization are proposed, including the improvement of constructive elements, providing for the use of discrete components and wireless technologies advantages, a new approach to software development and the use of a “full” operating system. Thirdly, it is hardware improvement of the local control device, which in the future will provide source-locating possibility of acoustic emission in the massif.

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