Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, China
Abstract Coal seams in China are mainly characterizsed by low permeability and high risk of coal and gas outburst. Therefore, the elimination of coal and gas outburst risk of low‐permeability coal seam remains a hard challenge. Taking Shihuatian Coal Mine in Guizhou Province, China as an example, bo...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-08-01
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| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.359 |
| _version_ | 1818437147413184512 |
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| author | Xie Jun Liang Yunpei Zou Quanle Li Lei Li Xuelong |
| author_facet | Xie Jun Liang Yunpei Zou Quanle Li Lei Li Xuelong |
| author_sort | Xie Jun |
| collection | DOAJ |
| description | Abstract Coal seams in China are mainly characterizsed by low permeability and high risk of coal and gas outburst. Therefore, the elimination of coal and gas outburst risk of low‐permeability coal seam remains a hard challenge. Taking Shihuatian Coal Mine in Guizhou Province, China as an example, boreholes were slotted using high‐pressure water jet to relieve the gas pressure inside the coal seam and increase the permeability of coal mass, which thus improves the gas drainage efficiency and eliminate the outburst risk. The results show that the gas drainage efficiency of the slotted boreholes significantly increases. Compared with the conventional boreholes, the average gas concentration and flow velocity improved by 1.6 and 7.5 times, respectively. Moreover, the prediction index of outburst risk is less than the critical value after high‐pressure water jet slotting, which indicate that the coal and gas outburst risk has been effectively eliminated. The measured values of gas desorption index of drilling cuttings are all lower than the critical value after the application of the high‐pressure water jet slotting technology. The research achievements could provide a practical reference for the effective gas disaster prevention and control in low‐permeability coal seams. |
| first_indexed | 2024-12-14T17:20:03Z |
| format | Article |
| id | doaj.art-08be80d627164f248239879dc3bc1c06 |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-12-14T17:20:03Z |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-08be80d627164f248239879dc3bc1c062022-12-21T22:53:20ZengWileyEnergy Science & Engineering2050-05052019-08-01741394140410.1002/ese3.359Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, ChinaXie Jun0Liang Yunpei1Zou Quanle2Li Lei3Li Xuelong4State Key Laboratory of Mining Disaster Prevention and Control Cofounded by Shandong Province and the Ministry of Science and Technology College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control College of Resources and Environment ScienceChongqing University Chongqing ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control College of Resources and Environment ScienceChongqing University Chongqing ChinaState Key Laboratory of Gas Disaster Monitoring and Emergency Technology China Coal Technology and Engineering Group Chongqing Research Institute Chongqing ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control College of Resources and Environment ScienceChongqing University Chongqing ChinaAbstract Coal seams in China are mainly characterizsed by low permeability and high risk of coal and gas outburst. Therefore, the elimination of coal and gas outburst risk of low‐permeability coal seam remains a hard challenge. Taking Shihuatian Coal Mine in Guizhou Province, China as an example, boreholes were slotted using high‐pressure water jet to relieve the gas pressure inside the coal seam and increase the permeability of coal mass, which thus improves the gas drainage efficiency and eliminate the outburst risk. The results show that the gas drainage efficiency of the slotted boreholes significantly increases. Compared with the conventional boreholes, the average gas concentration and flow velocity improved by 1.6 and 7.5 times, respectively. Moreover, the prediction index of outburst risk is less than the critical value after high‐pressure water jet slotting, which indicate that the coal and gas outburst risk has been effectively eliminated. The measured values of gas desorption index of drilling cuttings are all lower than the critical value after the application of the high‐pressure water jet slotting technology. The research achievements could provide a practical reference for the effective gas disaster prevention and control in low‐permeability coal seams.https://doi.org/10.1002/ese3.359coal and gas outburst riskcoal seam modificationgas drainagehigh‐pressure water jet slotting |
| spellingShingle | Xie Jun Liang Yunpei Zou Quanle Li Lei Li Xuelong Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, China Energy Science & Engineering coal and gas outburst risk coal seam modification gas drainage high‐pressure water jet slotting |
| title | Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, China |
| title_full | Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, China |
| title_fullStr | Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, China |
| title_full_unstemmed | Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, China |
| title_short | Elimination of coal and gas outburst risk of low‐permeability coal seam using high‐pressure water jet slotting technology: A case study in Shihuatian Coal Mine in Guizhou Province, China |
| title_sort | elimination of coal and gas outburst risk of low permeability coal seam using high pressure water jet slotting technology a case study in shihuatian coal mine in guizhou province china |
| topic | coal and gas outburst risk coal seam modification gas drainage high‐pressure water jet slotting |
| url | https://doi.org/10.1002/ese3.359 |
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