scholarly journals A Drawing System for Pole Diagram and Rose Diagram of Rock Mass Structural Surface

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Gaojian Hu
Keyword(s):  
Rock Mass ◽  
Clustering Algorithm ◽  
C Language ◽  
Rose Diagram ◽  
Pole Diagram ◽  
Plane Analysis ◽  
Drawing System ◽  
Structural Surface ◽  
Structure Plane ◽  
Drawing Method

The distribution of structural planes is complex and irregular. How to quickly and effectively obtain the occurrence and distribution characteristics of structural planes and improve the efficiency of data processing is a key technical issue in structural plane analysis. The paper combined fuzzy equivalent clustering algorithm, rose diagram drawing method, and C++ language, developed a drawing system for the pole diagram and rose diagram of rock mass structural planes, and verified the practicability of the system through an engineering case analysis. In the article, the fuzzy equivalent clustering of the occurrence of structural planes, the drawing of pole diagram, and the statistical analysis of structural planes were realized based on the fuzzy equivalent clustering algorithm. The rapid drawing of the striking rose diagram, trending rose diagram, and dip rose diagram module were realized based on the rose diagram drawing method. The system integrated the structure plane pole diagram and the occurrence rose diagram together and realized the rapid analysis and drawing of the structure plane.

Study of Seepage Properties of Fractured Rock Mass Based on Improved K-Means Clustering Algorithm

2013 ◽  
Vol 405-408 ◽  
pp. 310-315
Author(s):  
Hai Qing Guo ◽  
Bo Wen ◽  
Xiao Feng Bai
Keyword(s):  
Rock Mass ◽  
Clustering Algorithm ◽  
Fractured Rock ◽  
Rock Fracture ◽  
Fractured Rock Mass ◽  
Dam Foundation ◽  
Fracture Geometry ◽  
Basic Task ◽  
Matlab Program ◽  
Seepage Properties

Seepage properties of fractured rock mass are of prime importance for hydraulic engineering and accurate description of rock fracture geometry parameters is an important and basic task in rock hydraulics. In this paper, an improved K-means clustering algorithm for structural plane of fractured rock mass was first brought forward and the corresponding Matlab program for discontinuity orientations partitioning was compiled and then used in the fitting analysis of dominant orientations of certain dam foundation rock mass. On this basis, combining calculation formulas of multi-group fractures, the permeability tensor and principle value was calculated for the actual dam foundation. The results provide a theoretical and computational reference for other similar projects.

Ant colony ATTA clustering algorithm of rock mass structural plane in groups

2014 ◽  
Vol 21 (2) ◽  
pp. 709-714 ◽  
Author(s):  
Xi-bing Li ◽  
Ze-wei Wang ◽  
Kang Peng ◽  
Zhi-xiang Liu
Keyword(s):  
Rock Mass ◽  
Clustering Algorithm ◽  
Ant Colony ◽  
Structural Plane

The Discussion of Issues Related to the Rock Mass Structure Classification of Dam Foundation

2013 ◽  
Vol 353-356 ◽  
pp. 167-171
Author(s):  
Liang Qin Tang ◽  
Kui Tang ◽  
De Xin Nie
Keyword(s):  
Rock Mass ◽  
Wave Velocity ◽  
Surface Effect ◽  
Block Size ◽  
Rock Mass Structure ◽  
Dam Foundation ◽  
Rock Structure ◽  
Structural Surface ◽  
Strength And Stiffness ◽  
The Impact

Because various lithologic rock present very obvious differences in many aspects (such as: the apparent lumpiness, longitudinal wave velocity, mechanical property etc), the results of the rock mass structure classification by using current specification or general methods can not reflect the true engineering geological properties. Based on a large number of onsite structural surface investigations, acoustic measurements and field and laboratory tests, this paper discusses the related issues on division of rock mass structure using single lumpiness indicators and analyzes the impact of the structural body property and structural surface effect on the rock mass structure. At the same time, the related issue on the integrality coefficient is discussed in the evaluation of rock mass integrity degree. Finally, the proposal which rock structure classification should consider the structure bodys strength and stiffness, the structure surfaces extension length and closed degree, the structure body block size and the rock mass compression wave velocity is put forward.

scholarly journals The Impact of the Rock Mass Deformation on Geometric Changes of a Historical Chimney in the Salt Mine of Bochnia

2018 ◽  
Vol 35 ◽  
pp. 04002
Author(s):  
Anna Szafarczyk ◽  
Rafał Gawałkiewicz
Keyword(s):  
Rock Mass ◽  
Laser Scanning ◽  
Underground Mines ◽  
Salt Mine ◽  
Internal Factors ◽  
Rock Mass Deformation ◽  
Structural Surface ◽  
Geometry Measurement ◽  
Geometric Changes ◽  
The Impact

There are many ways of the geometry measurement of slim objects, with the application of geodetic and photogrammetric methods. A modern solution in the diagnostics of slim objects is the application of laser scanning, with the use of a scanner of a scanning total station. The point cloud, obtained from the surface of the scanned object gives the possibility of generating not only information on structural surface deformations, but also facilitates obtaining the data on the geometry of the axis of the building, as a basic indicator of the characteristics of its deformation. The cause of the change in the geometry of slim objects is the impact of many external and internal factors. These objects are located in the areas of working or closed underground mines. They can be impacted by the ground and they can face the results of the convergence of cavities. A specific structure of the salt rock mass causes subsequent convergence of the post-exploitation cavities, which has the influence on the behaviour of the terrain surface and the related objects. The authors analysed the impact of the changes in the rock mass and the surface on the changes of the industrial chimney in the Bochnia Salt Mine.

Analysis of Displacement in Guandi Underground Powerhouse Based on the Influence of Dislocation Surfaces

2013 ◽  
Vol 303-306 ◽  
pp. 2866-2870
Author(s):  
Meng Ke Yuan ◽  
Chun Yu Gao ◽  
Hong Chun Zheng
Keyword(s):  
Rock Mass ◽  
Opening Displacement ◽  
Measuring Range ◽  
Underground Powerhouse ◽  
Maximum Deformation ◽  
Structure Surface ◽  
Bolt Stress ◽  
Rock Mass Deformation ◽  
Structural Surface ◽  
Mass Deformation

The monitoring data suggests that the overall displacement in Guandi underground powerhouse is a little less, 87% of which is less than 30 mm, while the maximum deformation can be reached as big as 65.77mm. Combined with the study on excavated geological data, the bigger displacement part of Guandi underground powerhouse is mainly affected by the dislocation interfaces, the excavation disturbance causes an opening displacement on the rock mass near the dislocation interfaces and a much bigger displacement partially. Due to the structural surface cut rock mass, deformation coordination between the surrounding rock and the structure surface after stress applied, the stress concentration appears nearby, measuring range of bolt stress meter is excessed in large displacement cases.

Study about Mechanic Parameter of Slope Rock Mass' Structure Plane

2013 ◽  
Vol 368-370 ◽  
pp. 1551-1555
Author(s):  
Si Yu Wu ◽  
Bo Huang ◽  
Rui Jun Liu
Keyword(s):  
Rock Mass ◽  
Deformation Modulus ◽  
Friction Angle ◽  
Mechanical Parameters ◽  
Test Results ◽  
Rock Mass Structure ◽  
Stability Of Slope ◽  
Slope Rock ◽  
The Stability ◽  
Structure Plane

Firstly, the stability of the slope need to determine mechanical parameters of slope rock mass such as deformation modulus, Poissons ratio, cohesion and internal friction angle, etc. For intact rocks, the mechanical parameters mentioned before are easy to determined. While the stability of slope rock mass is controlled by the deformation and intensity. Therefore, how to determine the mechanical parameters of the structure is the key to analyze the stability of slope rock mass. This paper intends to set the slope rock mass below some extra-large bridge as the research object and use numerical calculation to determine the mechanics parameters of rock mass structure plane on the basis of rock sample mechanics test results.

scholarly journals A New Method for Automatic Extraction and Analysis of Discontinuities Based on TIN on Rock Mass Surfaces

2021 ◽  
Vol 13 (15) ◽  
pp. 2894
Author(s):  
Xiang Wu ◽  
Fengyan Wang ◽  
Mingchang Wang ◽  
Xuqing Zhang ◽  
Qing Wang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Clustering Algorithm ◽  
Point Clouds ◽  
New Method ◽  
Rock Masses ◽  
Average Deviation ◽  
Density Peaks ◽  
3D Point Clouds ◽  
Discontinuity Sets ◽  
Dip Angle

Light detection and ranging (LiDAR) can quickly and accurately obtain 3D point clouds on the surface of rock masses, and on the basis of this, discontinuity information can be extracted automatically. This paper proposes a new method to automatically extract discontinuity information from 3D point clouds on the surface of rock masses. This method first applies the improved K-means algorithm based on the clustering algorithm by fast search and find of density peaks (DPCA) and the silhouette coefficient in the cluster validity index to identify the discontinuity sets of rock masses, and then uses the hierarchical density-based spatial clustering of applications with noise (HDBSCAN) algorithm to segment the discontinuity sets and to extract each discontinuity from a discontinuity set. Finally, the random sampling consistency (RANSAC) method is used to fit the discontinuities and to calculate their parameters. The 3D point clouds of the typical rock slope in the Rockbench repository is used to extract the discontinuity orientations using the new method, and these are compared with the results obtained from the classical approach and the previous automatic methods. The results show that, compared to the results obtained by Riquelme et al. in 2014, the average deviation of the dip direction and dip angle is reduced by 26% and 8%, respectively; compared to the results obtained by Chen et al. in 2016, the average deviation of the dip direction and dip angle is reduced by 39% and 40%, respectively. The method is also applied to an artificial quarry slope, and the average deviation of the dip direction and dip angle is 5.3° and 4.8°, respectively, as compared to the manual method. Furthermore, the related parameters are analyzed. The study shows that the new method is reliable, has a higher precision when identifying rock mass discontinuities, and can be applied to practical engineering.

scholarly journals Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Qingqiu Wang ◽  
Mo Xu ◽  
Yunhui Zhang ◽  
Xinyu Cen ◽  
Xingwang Chang
Keyword(s):  
Rock Mass ◽  
Surface Condition ◽  
Geological Strength Index ◽  
Mechanical Parameters ◽  
Rock Types ◽  
Integrity Index ◽  
Disturbance Factor ◽  
Structural Surface ◽  
Test Result ◽  
Quantitative Formula

In order to obtain the accurate mechanical parameters of deep-buried coal goaf rock mass, the limitation of geological strength index (GSI) in concealed rock mass is analyzed. Based on the test result and analysis of the current normative standards, the classification indexes of rock mass structural are optimized based on discontinuity distance d and rock mass integrity index K v . The ratio of rock mass saturated strength to dry strength, η, is introduced, quantization formula of structural surface conditions is proposed, and the influence of groundwater and rock types is included in structural surface condition classification. The GSI system is improved to better suit all types of deep-buried and water-rich rock masses. Furthermore, the rock mass disturbance factor D’s quantitative formula is listed according to the Hoek–Brown (HB) criterion. Taking the goaf roof under railway as an example, the parameters of deep-buried rock mass are obtained based on the improved quantitative GSI system and HB criterion. This research provides a scientific reference for achieving geological parameters and engineering designing in goaf areas.

A Study on the Impact of Structure Plane on Unloading Rock Mass Deformation

2011 ◽  
Vol 243-249 ◽  
pp. 2167-2170
Author(s):  
Fei Wang ◽  
Xu Li Liang ◽  
Jian Po Du ◽  
Jian Feng Qi
Keyword(s):  
Rock Mass ◽  
Great Influence ◽  
Deformation Modulus ◽  
Strength Parameter ◽  
Deformation Properties ◽  
Modulus Of Deformation ◽  
Rock Mass Deformation ◽  
Structure Plane ◽  
The Impact ◽  
Mass Deformation

The rock mass deformation properties of unloading is very different from loading.The physical and mechanical properties of structural plane can bring a very great influence to rock’s unloading behavior. The lower the strength parameter of joint plane and the greater the angle of joint, the lower the unloading modulus of deformation. The greater the connectivity of joint,the faster the unloading modulus of deformation descend. In any case unloading amount is near linear relation with descend amount of unloading deformation modulus.

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