An entropy based spatial–temporal cube with its application to assess stress of overburden due to mining
Abstract Underground coal seam mining significantly alters the stress and energy distribution within the overlying rock, leading to eventual structural degradation. Therefore, it is imperative to quantitatively identify the temporal and spatial characteristics of stress evolution of overlying rock c...
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| Language: | English |
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Nature Portfolio
2024-06-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-64453-2 |
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| author | Changde Yang Yang Chen Binbin Yang Chunshui Huang |
| author_facet | Changde Yang Yang Chen Binbin Yang Chunshui Huang |
| author_sort | Changde Yang |
| collection | DOAJ |
| description | Abstract Underground coal seam mining significantly alters the stress and energy distribution within the overlying rock, leading to eventual structural degradation. Therefore, it is imperative to quantitatively identify the temporal and spatial characteristics of stress evolution of overlying rock caused by mining. This paper introduces a novel rock stress model integrating entropy and a spatial–temporal cube. Similar material model tests are used to identify the abrupt entropy changes within the mining rock, and the trend analysis is carried out to describe the spatial–temporal evolution law of stress during mining. Experimental findings indicate elevated stress levels in the unmined rock preceding and following the panel, as well as within specific rock strata above it. Definitively, dynamic stress arches within the surrounding rock of the stope predominantly bear and distribute the load and pressure from the overlying rock, and each stress mutation is accompanied by a sudden stress entropy change. Over time, z-score shows that the noticeable reduction in mining-induced overburden stress becomes increasingly pronounced, especially in the water-conducting fracture zone. The model's bifurcation set serves as the comprehensive criterion for the entropy-induced sudden changes in the rock system, signifying overall failure. |
| format | Article |
| id | doaj-art-a766fc547d6043b9a9ea6a2355a07c47 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-a766fc547d6043b9a9ea6a2355a07c472025-01-26T12:34:38ZengNature PortfolioScientific Reports2045-23222024-06-0114111310.1038/s41598-024-64453-2An entropy based spatial–temporal cube with its application to assess stress of overburden due to miningChangde Yang0Yang Chen1Binbin Yang2Chunshui Huang3Key Laboratory of Xinjiang Coal Resources Green Mining, Ministry of Education, Xinjiang Institute of EngineeringSchool of Earth Sciences and Engineering, Sun Yat-sen UniversitySchool of Civil Engineering, Xuchang UniversitySchool of Civil Engineering, Xuchang UniversityAbstract Underground coal seam mining significantly alters the stress and energy distribution within the overlying rock, leading to eventual structural degradation. Therefore, it is imperative to quantitatively identify the temporal and spatial characteristics of stress evolution of overlying rock caused by mining. This paper introduces a novel rock stress model integrating entropy and a spatial–temporal cube. Similar material model tests are used to identify the abrupt entropy changes within the mining rock, and the trend analysis is carried out to describe the spatial–temporal evolution law of stress during mining. Experimental findings indicate elevated stress levels in the unmined rock preceding and following the panel, as well as within specific rock strata above it. Definitively, dynamic stress arches within the surrounding rock of the stope predominantly bear and distribute the load and pressure from the overlying rock, and each stress mutation is accompanied by a sudden stress entropy change. Over time, z-score shows that the noticeable reduction in mining-induced overburden stress becomes increasingly pronounced, especially in the water-conducting fracture zone. The model's bifurcation set serves as the comprehensive criterion for the entropy-induced sudden changes in the rock system, signifying overall failure.https://doi.org/10.1038/s41598-024-64453-2FractalEntropyRock stressSimilar material model |
| spellingShingle | Changde Yang Yang Chen Binbin Yang Chunshui Huang An entropy based spatial–temporal cube with its application to assess stress of overburden due to mining Scientific Reports Fractal Entropy Rock stress Similar material model |
| title | An entropy based spatial–temporal cube with its application to assess stress of overburden due to mining |
| title_full | An entropy based spatial–temporal cube with its application to assess stress of overburden due to mining |
| title_fullStr | An entropy based spatial–temporal cube with its application to assess stress of overburden due to mining |
| title_full_unstemmed | An entropy based spatial–temporal cube with its application to assess stress of overburden due to mining |
| title_short | An entropy based spatial–temporal cube with its application to assess stress of overburden due to mining |
| title_sort | entropy based spatial temporal cube with its application to assess stress of overburden due to mining |
| topic | Fractal Entropy Rock stress Similar material model |
| url | https://doi.org/10.1038/s41598-024-64453-2 |
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