Nondestructive Test on Typical Roadway Supports of a Mine via Drilling Core and Ground Penetrating Radar

2011 ◽  
Vol 368-373 ◽  
pp. 2411-2416
Author(s):  
Jian Ping Han ◽  
Hai Peng Liu
Keyword(s):  
Ground Penetrating Radar ◽  
Geological Structure ◽  
Surrounding Rock ◽  
Potential Threat ◽  
Real Performance ◽  
Design Requirements ◽  
And Performance ◽  
The Stability ◽  
Ground Penetrating ◽  
Drilling Core

Temporary or permanent supports are necessary in underground construction for maintaining the stability and limiting the damage of surrounding rock. Due to the uncertainty of geological structure, the specificity of the underground environment as well as other factors, the quality and performance of supporting structure are often difficult to satisfy the design requirements, which not only seriously affects the normal construction and operation of mines but also has the potential threat to the safety of underground production. In order to investigate the influence of the unfavorable geologic environment on supporting concrete and evaluate the real performance of roadway supports of a mine, 17 typical projects were chosen and the strength of supporting concrete was detected by nondestructive drilling core method. The result shows that the strength is widely less than the design value. Furthermore, 4 projects of them were investigated by the ground penetrating radar (GPR) in order to evaluate the feasibility of GPR in the performance investigation of the roadway supports of a mine. The results indicate that ground penetrating radar is capable of measuring the thickness of the support, the distribution of rebars and the defects of the surrounding rock.

scholarly journals Applicability of Ground Penetrating Radar on desert archaeological sites: a case study from the Saqqara necropolis in Egypt

2014 ◽  
Vol 31 (2) ◽  
pp. 133-141 ◽  
Author(s):  
Fabian Welc ◽  
Radosław Mieszkowski ◽  
Sebastian Kowalczyk ◽  
Jerzy Trzciński
Keyword(s):  
Ground Penetrating Radar ◽  
Clay Fraction ◽  
Mineralogical Composition ◽  
Archaeological Site ◽  
Geological Structure ◽  
Horizontal Resolution ◽  
Archaeological Sites ◽  
Depth Range ◽  
Non Invasive ◽  
Ground Penetrating

Abstract This paper presents the preliminary results of ground penetrating radar sounding applied at the desert archaeological site in Saqqara (Egypt). The survey was carried out in 2012 within a project realized by Institute of Archaeology, Cardinal Stefan Wyszyński University in Warsaw and the Faculty of Geology, University of Warsaw. One of the key aims of the research was testing the application of ground penetrating radar to non-invasive surveys of desert archaeological sites. Radargrams obtained for area of so called the Dry Moat channel surrounding the Step Pyramid complex have shown the geological structure of its filling. It comprises among others debris-sand conglomerate of diluval origin characterized by a significant content of the clay fraction and clay minerals. Such lithological content strongly attenuate the propagation of EM waves, restricting the depth range of the GPR survey. The conducted geophysical prospection west to the Step Pyramid in Saqqara has confirmed the high applicability of the GPR method in non-invasive studies of vast architectural structures, such as the monumental ditch surrounding the Step Pyramid known as the Dry Moat. It should summarised that high horizontal resolution obtained during GPR survey is a result of local geological structure of the searched area, i.e. strong lithological contrast of the sediments filling the Dry Moat, which, depending on their mineralogical composition

The Application of Ground Penetrating Radar in Railway Tunnel Concrete Quality Detection

2011 ◽  
Vol 228-229 ◽  
pp. 1185-1189
Author(s):  
Su Qi ◽  
Xing Xing Chen
Keyword(s):  
Ground Penetrating Radar ◽  
Traditional Method ◽  
Detection Methods ◽  
Railway Tunnel ◽  
Testing Method ◽  
Quality Detection ◽  
Quality Testing ◽  
Concrete Quality ◽  
Ground Penetrating ◽  
Drilling Core

The priority of traditional tunnel concrete quality testing method is drilling core .The traditional method damage tunnel structure and detection speed is slowly.we use this method cann’t effectively meet the demand of rapid growth of tunnel concrete qulity testing. So the more fast and effective detection methods are needed.A new fast and effective kind of concrete quality detection methods is ground penetrating radar can meet the extensive tunnel concrete nondestructive testing. This paper introduces the basic principle of ground penetrating radar.I illustrate the application of railway tunnel testing by the testing in Ju Gan runnel of Lan Yue railway.TI is significance for railway tunnel concrete in future.

Research on Detection of Breaking Rock Zone of Roadway Surrounding Rock with Ground Penetrating Radar

2013 ◽  
Vol 353-356 ◽  
pp. 886-889
Author(s):  
Fu Jun Zhang ◽  
Hai Feng Cui ◽  
Yi Rui Hao
Keyword(s):  
Image Analysis ◽  
Ground Penetrating Radar ◽  
Surrounding Rock ◽  
Radar Detection ◽  
Field Detection ◽  
Ground Penetrating ◽  
Detection Principle

Based on the detection principle of ground penetrating radar, the feasibility of detecting breaking rock zone of roadway surrounding rock with ground penetrating radar is analysed. In the case of detecting breaking rock zone of roadway surrounding rock in Huafeng Colliery, the method of radar detection and image analysis is suggested. The results show that using ground penetrating radar to detect breaking rock zone of roadway surrounding rock can achieve good result, so it provides a new technical way for the field detection.

scholarly journals INTERPRETATION OF COAL POTENTION USING GROUND PENETRATING RADAR (GPR) METHOD

2018 ◽  
Vol 10 (1) ◽  
pp. 23
Author(s):  
Rohmatul Wahidah ◽  
Abdul Basid
Keyword(s):  
Ground Penetrating Radar ◽  
Alternative Energy ◽  
Potential Distribution ◽  
Color Pattern ◽  
Geological Structure ◽  
Structure Identification ◽  
Alternative Energy Source ◽  
Energy Needs ◽  
Yellow Color ◽  
Ground Penetrating

<pre>Coal exposure founded at Klatak Kebo Ireng village in Besuki Tulungagung precisely in the vicinity of the river. Energy needs is increasing so the coal used for one of alternative energy source that can be used by society. This study was conducted to determine of the potential distribution coal modeling on geological structure. Identification of coal structure is using Ground Penetrating Radar (GPR) 2005 it conducted because this method is more suitable for shallow of surveys. The location for taking data is around the river that showed to exposure. There are 5</pre><sup>th</sup> lines of taken data with length about 50 until 100 meters. Data processing was done using of software Future series 2005. The data displayed with software in the color pattern to obtain based on the constant of dielectric and conductivity. The results of interpretation study are the data indicates that there is a coal on the overall trajectory. Only in 2<sup>nd</sup> track contain little of coal. The Coal layers are appear in processing the results of data is thickness about 6 at the top. In the area of study also found the cavity (cavity area) which contained of several tracks. On the bottom of the track there is a pattern of coal reddish of yellow color which indicates that material contains of minerals.

scholarly journals Lidar and ground penetrating radar data in determining road surface conditions and geological characteristics of unstable soils

2017 ◽  
Vol 2 (20) ◽  
pp. 111-129
Author(s):  
Artur Plichta ◽  
Adam Piasecki
Keyword(s):  
Ground Penetrating Radar ◽  
Load Capacity ◽  
Radar Data ◽  
Road Surface ◽  
The Road ◽  
Geological Characteristics ◽  
Laser Scanners ◽  
Road Projects ◽  
The Stability ◽  
Ground Penetrating

Within the road investments the very important element determining repeatedly the success of the whole project is an adequate information about the characteristics of the site, its load capacity, stability and the possible impact of geological characteristics that may interfere with subsequent service life, not only for the road surface itself, but also for the surrounded objects. The surface is incessantly influenced by geological characteristics, determining its durability and functional usefulness. The main aim of this paper is to answer the question how by the usage of modern technics for obtaining data it is possible to find a link confirming the characteristics of land on which the specific road projects are supposed to be carried out, or where these projects have already been accomplished, concerning their requirements with high accuracy of location and also the stability and durability of the ground. This article makes also an attempt to answer not only the question how to identify the construction of road surface, but also how to locate underground cavities, created or influenced by the flow of water, or due to geological structures characterized as an inconsistent ground. The results were supported with geophysical researches using GPR method, and also data collected with laser scanners.

scholarly journals Ground penetrating radar and electrical resistivity tomography for locating buried building foundations: A case study in the city centre of Thessaloniki, Greece

2016 ◽  
Vol 47 (3) ◽  
pp. 1355
Author(s):  
G. Vargemezis ◽  
N. Diamanti ◽  
I. Fikos ◽  
A. Stampolidis ◽  
Th. Makedon ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Ground Penetrating Radar ◽  
Electrical Resistivity Tomography ◽  
Geophysical Methods ◽  
Geological Structure ◽  
City Centre ◽  
High Resistivity ◽  
Resistivity Tomography ◽  
Ground Penetrating ◽  
The City

Ground penetrating radar (GPR) and electrical resistivity tomography (ERT) surveys have been carried out in the city centre of Thessaloniki (N. Greece), for investigating possible locations of buried building foundations. Geophysical survey has been chosen as a non-destructive investigation method since the area is currently used as a car parking and it is covered by asphalt. The geoelectrical sections derived from ERT data in combination with the GPR profiles provided a broad view of the  subsurface.  Regarding  ERT,  high  resistivity  values  can  be  related  to  buried building remains, while lower resistivity values are more related to the surrounding geological materials. GPR surveying can also indicate man-made structures buried in the ground. Even though the two geophysical methods are affected in different ways by the subsurface conditions, the processed underground images from both techniques revealed great similarity. High resistivity anomalies and distinct GPR signals were observed in certain locations of the area under investigation, which are attributed to buried building foundations as well as the geological structure of the area.

Comparison Optimization Analysis of the Location of Power House under Complex Geological Structure

2006 ◽  
Vol 306-308 ◽  
pp. 1455-1460
Author(s):  
Jing Zeng ◽  
Qian Sheng ◽  
Qing Chun Zhou
Keyword(s):  
Rock Mass ◽  
Geological Structure ◽  
Surrounding Rock ◽  
Obvious Effect ◽  
Power House ◽  
Mass Comparison ◽  
Geological Conditions ◽  
Stability Of Surrounding Rock ◽  
Complex Geological Structure ◽  
The Stability

The power house of Yantan extended hydropower project, with complex geological conditions such as fault f211 below the power house and quartzite on top of it, is a huge underground cavern with large span and high wall. In order to evaluate the stability of the power house surrounded by such complex geological structure, the numerical simulation excavation of power house with different location schemes were studied by the elasto-plastic 2D FEM method. The deformation and evolutive process of the stress with the progress of excavation were analyzed. On the condition ensuring the whole stability of surrounding rock mass, comparison optimization analyses were conducted on the power house location scheme. The rational location scheme was demonstrated. The final analyses results show that: (1) The mechanical properties of quartzite and its relative location to the power house has no obvious influence to the stability of surrounding rock mass.(2) The f211 is the main bad geological structure which affect the stability of power house. (3) The case of moving 10m upward of power house is the most rational scheme for the whole stability of power house. (4) The Supporting measures, which would has an obvious effect in controlling the influence on the stability of surrounding rock mass by weak geological structure, are suggested at the out-crop of f211.

Recovery Execution in Landslide at the Portal of Highway Tunnel

2011 ◽  
Vol 250-253 ◽  
pp. 1823-1826 ◽  
Author(s):  
Kai Wang ◽  
Hai Gui Kang ◽  
Hai Tao Wang
Keyword(s):  
Stability Analysis ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Surrounding Rock ◽  
Landslide Stability ◽  
Highway Tunnel ◽  
Design Requirements ◽  
The Stability ◽  
Ground Condition

The main feature of NATM is to utilize all available means to develop the maximum self-supporting capacity of the surrounding rock or soil itself, and to undertake investigation and monitoring during construction to provide the stability of the tunnel. If undetected worse ground condition is encountered, the strengthening works will be carried out to ensure safety. In this case study, taking the Wangkeng tunnel portal engineering of the Jiyuan-Shaoyuan Expressway in Henan Province as an example, the calculation and evaluation of landslide stability are performed by limit equilibrium method and FEM. Based on the results of stability analysis, the anti-slide piles and ground drainage are adopted as the harnessing measures of landslide. Comparison of stability analysis before/after landslide harnesses was made by FEM. The results show that these treatments can satisfy the design requirements. It could be a useful reference to the design and construction of tunnels with soil entrance.

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