A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings
The top coal weakening process is an effective mean to increase the coal output, reduce the coal resource waste, and promote the sustainable development in a mine. The conventional blast weakening process and water injection weakening process are more widely applied in fully mechanized caving mining...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/8862044 |
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| _version_ | 1832564891719827456 |
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| author | Zhaopeng Wu Junhui Wang Zhijun Wan Jingyi Cheng Luchang Xiong Lizhu Zhao Xiaogang Liu |
| author_facet | Zhaopeng Wu Junhui Wang Zhijun Wan Jingyi Cheng Luchang Xiong Lizhu Zhao Xiaogang Liu |
| author_sort | Zhaopeng Wu |
| collection | DOAJ |
| description | The top coal weakening process is an effective mean to increase the coal output, reduce the coal resource waste, and promote the sustainable development in a mine. The conventional blast weakening process and water injection weakening process are more widely applied in fully mechanized caving mining of hard thick coal seams, but under some special complex geological conditions, no desirable performance has been achieved in top coal weakening by one weakening process alone after substantial investment in capital and equipment. In the context of highly tough top coal with partings at working face 110501 for fully mechanized top coal caving mining in Yushutian Coal Mine, effects of parting band and high toughness on top coal breaking were studied in terms of mechanism and extent, a multifunctional compound drilling field integrating blast weakening, water injection weakening, and gas extraction was purposefully designed, and a cyclic top coal weakening process for highly tough coal seams with partings was proposed. Engineering practice and performance testing show that degree of fragmentation and mobility of top coal was improved, mean top coal recovery ratio at the working face increased by about 35%, coal resource waste decreased, and potential risks of gas explosion and mine fire were eliminated, which provides reference for top coal weakening process under similarly complex engineering conditions. |
| format | Article |
| id | doaj-art-70ab6665f9b94516bf1c2eab31ba8cc5 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-70ab6665f9b94516bf1c2eab31ba8cc52025-02-03T01:09:55ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/88620448862044A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with PartingsZhaopeng Wu0Junhui Wang1Zhijun Wan2Jingyi Cheng3Luchang Xiong4Lizhu Zhao5Xiaogang Liu6Key Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaYushutian Coal Mine, Xuzhou Coal Mining Group, Xuzhou, Jiangsu 221018, ChinaXinjiang Branch, Xuzhou Coal Mining Group, Xuzhou, Jiangsu 221018, ChinaThe top coal weakening process is an effective mean to increase the coal output, reduce the coal resource waste, and promote the sustainable development in a mine. The conventional blast weakening process and water injection weakening process are more widely applied in fully mechanized caving mining of hard thick coal seams, but under some special complex geological conditions, no desirable performance has been achieved in top coal weakening by one weakening process alone after substantial investment in capital and equipment. In the context of highly tough top coal with partings at working face 110501 for fully mechanized top coal caving mining in Yushutian Coal Mine, effects of parting band and high toughness on top coal breaking were studied in terms of mechanism and extent, a multifunctional compound drilling field integrating blast weakening, water injection weakening, and gas extraction was purposefully designed, and a cyclic top coal weakening process for highly tough coal seams with partings was proposed. Engineering practice and performance testing show that degree of fragmentation and mobility of top coal was improved, mean top coal recovery ratio at the working face increased by about 35%, coal resource waste decreased, and potential risks of gas explosion and mine fire were eliminated, which provides reference for top coal weakening process under similarly complex engineering conditions.http://dx.doi.org/10.1155/2021/8862044 |
| spellingShingle | Zhaopeng Wu Junhui Wang Zhijun Wan Jingyi Cheng Luchang Xiong Lizhu Zhao Xiaogang Liu A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings Shock and Vibration |
| title | A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings |
| title_full | A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings |
| title_fullStr | A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings |
| title_full_unstemmed | A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings |
| title_short | A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings |
| title_sort | case study of cyclic top coal weakening process based on highly tough coal seam with partings |
| url | http://dx.doi.org/10.1155/2021/8862044 |
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