Numerical investigation on blast-induced rock fragmentation with different stemming structures
Abstract Stemming is one of the main concerns in blast of rock engineering due to its impact on explosion energy consumption and rock excavation performance. In this study, blast-induced rock fragmentation under different stemming conditions is numerically studied using combined numerical modelling...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Springer
2023-09-01
|
| Series: | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40948-023-00654-9 |
| _version_ | 1797689045455732736 |
|---|---|
| author | Xudong Li Kewei Liu Yanyan Sha Jiacai Yang Zhixian Hong |
| author_facet | Xudong Li Kewei Liu Yanyan Sha Jiacai Yang Zhixian Hong |
| author_sort | Xudong Li |
| collection | DOAJ |
| description | Abstract Stemming is one of the main concerns in blast of rock engineering due to its impact on explosion energy consumption and rock excavation performance. In this study, blast-induced rock fragmentation under different stemming conditions is numerically studied using combined numerical modelling and image processing. After careful determination the parameters of constitutive material models, the developed numerical model in LS-DYNA is verified based on the blast testing results including rock fracturing and fragment size distribution (FSD). The calibrated constitutive models are then used to model the pressure variation and rock disintegration produced by blasting with different stemming structures. The size data of simulated rock fragmentation are obtained by image-processing the cut surfaces of the numerical model with the program ImageJ, and the blast-created rock FSD is characterized using a three-parameter generalized extreme value function. The effects of the combination of explosive, air/sand deck and stemming on blast-induced rock fragmentation are quantitatively analysed, considering various stemming modes, stemming lengths and air/sand deck lengths. The results show that the blast-created fragment size decreases with an increase in stemming length, a decreasing in air/sand deck length, replacement of top stemming (stemming at borehole collar with air deck) with bottom stemming (stemming directly contact explosive) and alteration of air deck to sand deck, while the FSD range exhibits the opposite tendency. Bottom stemming is recommended for practical blasting due to its efficiency in rock fragmentation and robustness with respect to stemming length. |
| first_indexed | 2024-03-12T01:40:17Z |
| format | Article |
| id | doaj.art-73915cc1b7734e81b9455c4ae3269ceb |
| institution | Directory Open Access Journal |
| issn | 2363-8419 2363-8427 |
| language | English |
| last_indexed | 2024-03-12T01:40:17Z |
| publishDate | 2023-09-01 |
| publisher | Springer |
| record_format | Article |
| series | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
| spelling | doaj.art-73915cc1b7734e81b9455c4ae3269ceb2023-09-10T11:29:56ZengSpringerGeomechanics and Geophysics for Geo-Energy and Geo-Resources2363-84192363-84272023-09-019113110.1007/s40948-023-00654-9Numerical investigation on blast-induced rock fragmentation with different stemming structuresXudong Li0Kewei Liu1Yanyan Sha2Jiacai Yang3Zhixian Hong4School of Resources and Safety Engineering, Central South UniversitySchool of Resources and Safety Engineering, Central South UniversityDepartment of Mechanical and Structural Engineering and Materials Science, University of StavangerSchool of Resources and Safety Engineering, Central South UniversitySchool of Resources and Safety Engineering, Central South UniversityAbstract Stemming is one of the main concerns in blast of rock engineering due to its impact on explosion energy consumption and rock excavation performance. In this study, blast-induced rock fragmentation under different stemming conditions is numerically studied using combined numerical modelling and image processing. After careful determination the parameters of constitutive material models, the developed numerical model in LS-DYNA is verified based on the blast testing results including rock fracturing and fragment size distribution (FSD). The calibrated constitutive models are then used to model the pressure variation and rock disintegration produced by blasting with different stemming structures. The size data of simulated rock fragmentation are obtained by image-processing the cut surfaces of the numerical model with the program ImageJ, and the blast-created rock FSD is characterized using a three-parameter generalized extreme value function. The effects of the combination of explosive, air/sand deck and stemming on blast-induced rock fragmentation are quantitatively analysed, considering various stemming modes, stemming lengths and air/sand deck lengths. The results show that the blast-created fragment size decreases with an increase in stemming length, a decreasing in air/sand deck length, replacement of top stemming (stemming at borehole collar with air deck) with bottom stemming (stemming directly contact explosive) and alteration of air deck to sand deck, while the FSD range exhibits the opposite tendency. Bottom stemming is recommended for practical blasting due to its efficiency in rock fragmentation and robustness with respect to stemming length.https://doi.org/10.1007/s40948-023-00654-9Rock blastingStemmingRock fragmentationNumerical modelling |
| spellingShingle | Xudong Li Kewei Liu Yanyan Sha Jiacai Yang Zhixian Hong Numerical investigation on blast-induced rock fragmentation with different stemming structures Geomechanics and Geophysics for Geo-Energy and Geo-Resources Rock blasting Stemming Rock fragmentation Numerical modelling |
| title | Numerical investigation on blast-induced rock fragmentation with different stemming structures |
| title_full | Numerical investigation on blast-induced rock fragmentation with different stemming structures |
| title_fullStr | Numerical investigation on blast-induced rock fragmentation with different stemming structures |
| title_full_unstemmed | Numerical investigation on blast-induced rock fragmentation with different stemming structures |
| title_short | Numerical investigation on blast-induced rock fragmentation with different stemming structures |
| title_sort | numerical investigation on blast induced rock fragmentation with different stemming structures |
| topic | Rock blasting Stemming Rock fragmentation Numerical modelling |
| url | https://doi.org/10.1007/s40948-023-00654-9 |
| work_keys_str_mv | AT xudongli numericalinvestigationonblastinducedrockfragmentationwithdifferentstemmingstructures AT keweiliu numericalinvestigationonblastinducedrockfragmentationwithdifferentstemmingstructures AT yanyansha numericalinvestigationonblastinducedrockfragmentationwithdifferentstemmingstructures AT jiacaiyang numericalinvestigationonblastinducedrockfragmentationwithdifferentstemmingstructures AT zhixianhong numericalinvestigationonblastinducedrockfragmentationwithdifferentstemmingstructures |