Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Coal (2)
- Coal mines (2)
- Agent-based modeling (1)
- Bouguer anomaly (1)
- Changing structures (1)
-
- Coal containing gas (1)
- Coal deposits (1)
- Coal gas (1)
- Coal mine (1)
- Coal seam water injections (1)
- Computer simulation (1)
- Confining pressures (1)
- Critical slowing down (1)
- Crustal thickness (1)
- Diffusion (1)
- Disasters (1)
- Energy release (1)
- Froth flotation (1)
- Gas desorption (1)
- Injection durations (1)
- Libya (1)
- Libyan Arab Jamahiriya (1)
- Loading (1)
- Loading rate (1)
- Longwall gob (1)
- Magma (1)
- Mechanical properties (1)
- Methane drainage (1)
- Methane enrichment zone (1)
- Mineral liberation analysis (1)
Articles 1 - 9 of 9
Full-Text Articles in Mining Engineering
Effect Of Explosive Charge Geometry On Shockwave Propagation, Catherine E. Johnson, Phillip R. Mulligan, Kelly Williams, Martin Langenderfer, Jeffrey Heniff
Effect Of Explosive Charge Geometry On Shockwave Propagation, Catherine E. Johnson, Phillip R. Mulligan, Kelly Williams, Martin Langenderfer, Jeffrey Heniff
Mining Engineering Faculty Research & Creative Works
With advancements in the 3D printing of explosives, the understanding how the shape of an explosive charge influences the energy expansion and subsequently the focusing of energy is becoming increasingly more important. Theoretically, explosive charges could be printed to focus the energy on targets of interest or to synthesize nanomaterials. The first step to quantifying the energy expansion and shock wave convergences for a 3D printed charge is to examine simple geometries of traditional explosive charges (non-3D printed). Detonation of 15 PETN-based primasheet charges in the spherical, cubic, cylindrical, and tetrahedral configurations have been examined in this study. Qualitative data …
Crustal Thickness Beneath Libya And The Origin Of Partial Melt Beneath As Sawda Volcanic Province From Receiver Function Constraints, Awad A. Lemnifi, Abdelsalam Elshaafi, John Browning, Nassib Aouad, Saad K. El Ebaidi, Kelly K. Liu, Agust Gudmundsson
Crustal Thickness Beneath Libya And The Origin Of Partial Melt Beneath As Sawda Volcanic Province From Receiver Function Constraints, Awad A. Lemnifi, Abdelsalam Elshaafi, John Browning, Nassib Aouad, Saad K. El Ebaidi, Kelly K. Liu, Agust Gudmundsson
Mining Engineering Faculty Research & Creative Works
This study investigates crustal thickness and properties within the Libyan region. Results obtained from 15 seismic stations belonging to the Libyan Center for Remote Sensing and Space Science are reported, in addition to 3 seismic stations publically available, using receiver functions. The results show crustal thicknesses ranging from 24 km to 36 km (with uncertainties ranging between ±0.10 km and ±0.90 km). More specifically, crustal thickness ranges from 32 km to 36 km in the southern portion of the Libyan territory then becomes thinner, between 24 km and 30 km, in the coastal areas of Libya and thinnest, between 24 …
Shockwave Interaction With A Cylindrical Structure, Phillip R. Mulligan
Shockwave Interaction With A Cylindrical Structure, Phillip R. Mulligan
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
An increased understanding of the shockwave interaction with a cylindrical structure is the foundation for developing a method to explosively seal a pipe similar to the Deepwater Horizon accident in the Gulf of Mexico. Shockwave interactions with a cylindrical structure have been a reoccurring focus of energetics research. Some of the most notable contributions of non-destructive tests are described in ``The Effects of Nuclear Weapons'' (Glasstone, 1962). The work presented by Glasstone examines shockwave interaction from a 20-megaton bomb with a cylindrical structure. However, the data is limited to a peak overpressure of less than 25 psi, requiring several miles …
Time Effect Of Water Injection On The Mechanical Properties Of Coal And Its Application In Rockburst Prevention In Mining, Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, Jifa Qian, Dong Zhu, Mingyao Wei
Time Effect Of Water Injection On The Mechanical Properties Of Coal And Its Application In Rockburst Prevention In Mining, Xiaofei Liu, Guang Xu, Chong Zhang, Biao Kong, Jifa Qian, Dong Zhu, Mingyao Wei
Mining Engineering Faculty Research & Creative Works
Coal seam water injection is widely used to prevent rockbursts in coal mines, and the duration of water injection is an important parameter related to the effectiveness of rockburst prevention, making it of practical importance to optimize the effective water injection duration. This paper presents the test results of the mechanical properties and pore structure of samples with different soaking time, obtained from a working face where rockburst occurred. Soaking time changes the mechanical properties of samples, and this time effect differs with the coal size (from centimeter to nanometer size). Results of numerical simulation and on-site tests in the …
Impact Of Coalbed Incidence Angle On Methane Enrichment Zone In Longwall Gob, Shengyong Hu, Ao Zhang, Guorui Feng, Shuwen Guan, Xiangqian Guo, Chao Li, Guang Xu
Impact Of Coalbed Incidence Angle On Methane Enrichment Zone In Longwall Gob, Shengyong Hu, Ao Zhang, Guorui Feng, Shuwen Guan, Xiangqian Guo, Chao Li, Guang Xu
Mining Engineering Faculty Research & Creative Works
To control methane emissions in gob into longwall working faces, it is necessary to understand the distributions of methane enrichment zones (MEZ) around mined coal seams with different incidence angles. In this paper, FLAC3D software is used to calculate the three-dimensional stress distributions in MEZ in gobs with coalbed incidence angles ranging from 0° to 50°. The results show that MEZ consistently exhibit a "hexagon" shape, and rotate in a clockwise direction as the coalbed angle increases. The MEZ range above the mined seam is larger than that below the mined seam. As the coalbed angle increases, the MEZ …
Effects Of Loading Rate On Gas Seepage And Temperature In Coal And Its Potential For Coal-Gas Disaster Early-Warning, Chong Zhang, Xiaofei Liu, Guang Xu, Xiaoran Wang
Effects Of Loading Rate On Gas Seepage And Temperature In Coal And Its Potential For Coal-Gas Disaster Early-Warning, Chong Zhang, Xiaofei Liu, Guang Xu, Xiaoran Wang
Mining Engineering Faculty Research & Creative Works
The seepage velocity and temperature externally manifest the changing structure, gas desorption and energy release that occurs in coal containing gas failure under loading. By using the system of coal containing gas failure under loading, this paper studies the law of seepage velocity and temperature under different loading rates and at 1.0 MPa confining pressure and 0.5 MPa gas pressure, and combined the on-site results of gas pressure and temperature. The results show that the stress directly affects the seepage velocity and temperature of coal containing gas, and the pressure and content of gas have the most sensitivity to mining …
Recovery Of Phosphate Minerals From Plant Tailings Using Direct Froth Flotation, Ashraf Alsafasfeh, Lana Z. Alagha
Recovery Of Phosphate Minerals From Plant Tailings Using Direct Froth Flotation, Ashraf Alsafasfeh, Lana Z. Alagha
Mining Engineering Faculty Research & Creative Works
Wastes produced from the phosphate industry presents many challenges due to the high economic and environmental impacts involved with their disposal. However, the relative scarcity of high-grade phosphate ores has driven researchers to recover and recycle these valuable wastes (secondary sources). The goal of this study was to investigate the possibility of upgrading the P2O5 content in tailings produced from a phosphorous production plant using direct froth flotation. Characterization assays, including X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence (XRF), and mineral liberation analysis (MLA), were first conducted to identify the mineralogical and morphological characteristics of …
Flotation Behavior Of Complex Sulfide Ores In The Presence Of Biodegradable Polymeric Depressants, Muhammad Badar Hayat, Lana Z. Alagha, Syed Mohammad Sannan
Flotation Behavior Of Complex Sulfide Ores In The Presence Of Biodegradable Polymeric Depressants, Muhammad Badar Hayat, Lana Z. Alagha, Syed Mohammad Sannan
Mining Engineering Faculty Research & Creative Works
In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS2) from sphalerite (ZnS) and pyrite (FeS2) using sodium isopropyl xanthate as a collector and 4-methyl-2-pentanol (MIBC) as a frother. Flotation tests were carried out in a D12-Denver flotation laboratory cell in the presence and absence of chitosan and/or sodium cyanide depressant which is commercially used as pyrite depressant in sulfide mineral flotation process. Flotation recoveries and concentrate grades (assay) were studied as a function of polymer concentration and flotation time. It …
Responsiveness Of Mining Community Acceptance Model To Key Parameter Changes, Mark Kofi Boateng, Kwame Awuah-Offei
Responsiveness Of Mining Community Acceptance Model To Key Parameter Changes, Mark Kofi Boateng, Kwame Awuah-Offei
Mining Engineering Faculty Research & Creative Works
The mining industry has difficulties predicting changes in the level of community acceptance of its projects over time. These changes are due to changes in the society and individual perceptions around these mines as a result of the mines' environmental and social impacts. Agent-based modeling can be used to facilitate better understanding of how community acceptance changes with changing mine environmental impacts. This work investigates the sensitivity of an agent-based model (ABM) for predicting changes in community acceptance of a mining project due to information diffusion to key input parameters. Specifically, this study investigates the responsiveness of the ABM to …