Thermographic analysis of heat generation during ucs testing of rocks

Download

index.pdf

Date

2020

Author

Kırmacı, Alper

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

297
views

93
downloads

SMining activities concentrate on the production of underground resources for energy generation and raw material requirements worldwide, as it is also the case in Turkey. For this reason, the exploration of new resources proceeds consistently to meet the increasing raw material demand of the industry. Rock mechanics has a vital role in underground mining and surface mining. At present, the devices and instruments used in rock mechanics laboratory testing, for example, uniaxial compressive strength test, have inferior sensing capability of the initial formation of cracks. Therefore, some inferences must be made by analyzing the data collected during tests. However, this effort cannot be supported with crucial and reliable visual data at the initial crack formation. Regarding this, in this thesis study, the failure behavior of different types of rock specimens was analyzed by a thermal camera during uniaxial compressive strength tests. Hence, this thesis study is expected to become one of the current studies in rock mechanics literature. Therefore, it is foreseen that this subject will make a significant contribution to literature. The experiment results show that gneiss-schist specimens have greater uniaxial compressive strength values than andesite samples. Temperature increase at the failure moment was detected as 4.45 ℃ and 9.58 ℃ for andesite and gneiss-schist specimens, respectively. Higher temperature increase was observed with respect to UCS value. Besides, a temperature decrease was recorded during marble specimens. The amount of temperature decrease was detected about 0.5-0.6 ℃. The temperature change at the specimen causes the radiation energy release. As a result of the porosity tests, it was observed that increase in the porosity rate is parallel to higher radiation energy released, from 17.72 kJ to 107.81 kJ.

Subject Keywords

Rock mechanics., Rock Mechanics, Temperature Effects, Laboratory Experiments, Thermography Images, Infrared Thermal Camera

URI

http://etd.lib.metu.edu.tr/upload/12625086/index.pdf
https://hdl.handle.net/11511/45352

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Thermographic analysis of failure for different rock types under uniaxial loading Kırmacı, Alper; Erkayaoğlu, Mustafa (2020-12-01) Mining activities focus on the production of mineral resources for energy generation and raw material requirements worldwide and it is a known fact that shallow reserves become scarce. For this reason, exploration of new resources proceeds consistently to meet the increasing energy and raw material demand of industrial activities. Rock mechanics has a vital role in underground mining and surface mining Devices and instruments used in laboratory testing to determine rock mechanics related parameters might ha...
The feasibility study for an enhanced geothermal system application in Dikili-İzmir region Turan, Ayşegül; Artun, Emre; Sustainable Environment and Energy Systems (2016-9) For Turkey, one sustainable way to increase the clean energy share in the power generation can be the utilization of geothermal resources as they are abundant, reliable, domestic and able to provide base load. This study aims to investigate the untapped potential of hot dry rock systems to generate power. Dikili-İzmir geothermal field is selected as a case study with four different production scenarios. Accessible resource base and recoverable heat energy are calculated by employing a probabilistic approach...
Parametric study of high-level nuclear waste storage in underground hard rock caverns Altıntaş, Taci Emre; Abduljabar, Alak Abdulsatar Abduljabar; Yardımcı, Ahmet Güneş (2022-03-22) Rising global energy demand has set nuclear energy as a trending power generation method dueto its production cost and efficiency advantages. Remnants of the reactive process create large amountsof radioactive waste that pose environmental risks in case of improper management. High-level wastesare widely isolated by burying into deep geological voids or man-made excavations due to continuousheat emission for hundreds of years. Although design and excavating large underground caverns is apart of ordinary Roc...
A modified methodology for preliminary design of weak rock slopes in lignite mines Yardımcı, Ahmet Güneş; Karpuz, Celal (null; 2019-01-01) In the last decade, popularity of lignite reserves has tremendously increased as an indigenous alternative to fulfill the growing energy demand of Turkey. Most of the proven reserves are situated in shallow depths and extracted by surface mining. Lignite beds and host rock are prone to show weak rock properties from geomechanical aspect. Rock mass failure or structurally controlled mechanisms may drive any potential slope instability. Developing practical tools for preliminary slope design can be useful for...
The analysis of total factor efficiency in the public lignite mining organizations in turkey Çimen, Selahattin; Güyagüler, Tevfik; Department of Mining Engineering (2011) In recent years, the risks created by the import of energy on the security of energy supply has encouraged countries to utilize local resources to a greater extend, and for many countries including Turkey coal is at the top of the local resources. However, it is not sufficient for countries to have an energy resource itself. Intens competition in today's globalized system requires the resources to be produced and utilized in the most economical manner. The supply of the resources to the market in a competit...

Citation Formats

A. Kırmacı, “Thermographic analysis of heat generation during ucs testing of rocks,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Mining Engineering., Middle East Technical University, 2020.