A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method
Abstract At present in China, short‐wall working face coal‐mining methods are among the main methods used for the high‐efficiency recoveries of boundary coal pillars and residual pillars. In traditional short‐wall mining methods, overlying roofs are supported by coal pillars. However, issues such as...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-12-01
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| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.474 |
| _version_ | 1823925132725321728 |
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| author | Jinhao Wen Weimin Cheng Lianjun Chen Shaoshuai Shi Zhijie Wen |
| author_facet | Jinhao Wen Weimin Cheng Lianjun Chen Shaoshuai Shi Zhijie Wen |
| author_sort | Jinhao Wen |
| collection | DOAJ |
| description | Abstract At present in China, short‐wall working face coal‐mining methods are among the main methods used for the high‐efficiency recoveries of boundary coal pillars and residual pillars. In traditional short‐wall mining methods, overlying roofs are supported by coal pillars. However, issues such as the excessive number of coal pillars, low coal recovery efficiency, large areas of hanging roof arches, etc, have been encountered. In view of the aforementioned issues of the current short‐wall mining technology, this study took the short‐wall mining of the Yujialiang Mine in the Shendong mining area as the project background. The study then proposed a judgment method for the key stratum on the working face of the mine using a short‐wall continuous mining and full‐caving method. The proposed method was based on the theory of elastic plates and was verified using the theoretical analysis results of similar material simulation experiments. FLAC 3D software was adopted to analyze the stress and displacement evolution processes of the overlying rock strata during the advancement of the working face using a short‐wall continuous mining and full‐caving method. The results showed that the short‐wall continuous mining and full‐caving method not only had the ability to improve the recovery rate, but was also able to realize the effective control of the roof areas, thereby avoiding any large areas of hanging arches. The short‐wall continuous mining and full‐caving method is potentially of important significance for the improvement of coal recovery rates, as well as for the safe and highly efficient mining of boundary coal pillars and residual pillars in mines under special conditions. |
| first_indexed | 2024-12-16T20:04:02Z |
| format | Article |
| id | doaj.art-b52c71a960b84aed84d0ed4b414647e8 |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-12-16T20:04:02Z |
| publishDate | 2019-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-b52c71a960b84aed84d0ed4b414647e82022-12-21T22:18:22ZengWileyEnergy Science & Engineering2050-05052019-12-01762984300410.1002/ese3.474A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving methodJinhao Wen0Weimin Cheng1Lianjun Chen2Shaoshuai Shi3Zhijie Wen4School of Mechanics and Civil Engineering China University of Mining and Technology (Beijing) Beijing ChinaState Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and Technology Shandong University of Science and Technology Qingdao ChinaState Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and Technology Shandong University of Science and Technology Qingdao ChinaGeotechnical and Structural Engineering Research Center Shandong University Jinan ChinaState Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and Technology Shandong University of Science and Technology Qingdao ChinaAbstract At present in China, short‐wall working face coal‐mining methods are among the main methods used for the high‐efficiency recoveries of boundary coal pillars and residual pillars. In traditional short‐wall mining methods, overlying roofs are supported by coal pillars. However, issues such as the excessive number of coal pillars, low coal recovery efficiency, large areas of hanging roof arches, etc, have been encountered. In view of the aforementioned issues of the current short‐wall mining technology, this study took the short‐wall mining of the Yujialiang Mine in the Shendong mining area as the project background. The study then proposed a judgment method for the key stratum on the working face of the mine using a short‐wall continuous mining and full‐caving method. The proposed method was based on the theory of elastic plates and was verified using the theoretical analysis results of similar material simulation experiments. FLAC 3D software was adopted to analyze the stress and displacement evolution processes of the overlying rock strata during the advancement of the working face using a short‐wall continuous mining and full‐caving method. The results showed that the short‐wall continuous mining and full‐caving method not only had the ability to improve the recovery rate, but was also able to realize the effective control of the roof areas, thereby avoiding any large areas of hanging arches. The short‐wall continuous mining and full‐caving method is potentially of important significance for the improvement of coal recovery rates, as well as for the safe and highly efficient mining of boundary coal pillars and residual pillars in mines under special conditions.https://doi.org/10.1002/ese3.474caving spancomposite key stratumnumerical simulationshort‐wall continuous mining and full cavingsimilar material simulation experiment |
| spellingShingle | Jinhao Wen Weimin Cheng Lianjun Chen Shaoshuai Shi Zhijie Wen A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method Energy Science & Engineering caving span composite key stratum numerical simulation short‐wall continuous mining and full caving similar material simulation experiment |
| title | A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method |
| title_full | A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method |
| title_fullStr | A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method |
| title_full_unstemmed | A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method |
| title_short | A study of the dynamic movement rule of overlying strata combinations using a short‐wall continuous mining and full‐caving method |
| title_sort | study of the dynamic movement rule of overlying strata combinations using a short wall continuous mining and full caving method |
| topic | caving span composite key stratum numerical simulation short‐wall continuous mining and full caving similar material simulation experiment |
| url | https://doi.org/10.1002/ese3.474 |
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