Improving the P-wave Velocity Determination by Considering the Effects of Joint Properties in Artificial Rock Samples | ||
| Journal of Mining and Environment | ||
| مقاله 12، دوره 16، شماره 3، مرداد و شهریور 2025، صفحه 1009-1025 اصل مقاله (17.48 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22044/jme.2024.15261.2924 | ||
| نویسندگان | ||
| Mohammad Rezaei* 1؛ Seyed Pourya Hosseini1؛ Danial Jahed Armaghani2؛ Manoj Khandelwal3 | ||
| 1Department of Mining Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran | ||
| 2School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia | ||
| 3Institute of Innovation, Science and Sustainability, Federation University Australia, Ballarat, VIC 3350, Australia | ||
| چکیده | ||
| This paper presents an experimental-statistical study investigating the influence of five joint properties: density, filling type, angle, aperture, and roughness on the longitudinal wave velocity (LWV) of concrete samples. To achieve this, each of the five properties is categorized into distinct groups with specific intervals. Concrete samples measuring 15*15*15 cm are prepared in the laboratory based on an optimal combination of 75% sand, 15% cement, and 10% water. The LWV values of these samples are then measured. The experimental results indicate that joint density, roughness, and aperture have an inverse relation with LWV, resulting in reductions of 82%, 22.5% and 49%, respectively. Additionally, an approximate sinusoidal relationship between LWV and joint angle is established, leading to a variation of approximately 10% in LWV values for different joint angles. To evaluate the effect of joint filling on LWV, various filling materials, including iron oxide, calcite, silica, clay, and gypsum are used, resulting in approximately a 34% variation in LWV values. It was found that gypsum filling yields the highest LWV value while iron oxide filling produces the lowest. Furthermore, analysis of variance (ANOVA) confirms that a polynomial quadratic equation best represents the relation between LWV and each of the joint characteristics, with determination coefficient (R2) values ranging from 0.694 to 0.99. Finally, a verification study using "validation samples" demonstrates the acceptable accuracy for the proposed equations, with minimum relative errors ranging from 3% to 13%, a low root mean square error of 189.08 m/s, and a high R2 value of 0.926. This research enhances understanding of wave propagation through jointed rock masses with varying joint characteristics and provides theoretical support for rock reorganization and dynamic stability analysis of rock masses. | ||
| کلیدواژهها | ||
| Rock mass؛ Joint؛ Longitudinal wave velocity؛ Experimental study؛ Statistical analysis | ||
| مراجع | ||
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