ORIGINAL RESEARCH article
Front. Built Environ.
Sec. Geotechnical Engineering
Volume 11 - 2025 | doi: 10.3389/fbuil.2025.1554463
Study of coal mine modified clean fracturing fluid and optimization of hydraulic fracturing sand adding process
Provisionally accepted
- 1China Coal Technology Engineering Group Chongqing Research Institute, Chongqing, China
- 2Shandong University of Science and Technology, Qingdao, Shandong Province, China
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To enhance the permeability of coal seam and improve the gas extraction efficiency is an effective measure to ensure the safety of coal mine production, especially, the research of hydraulic fracturing technology has shown better permeability enhancement efficiency of coal seam. However, when the technology is faced with deep and high stress environment, it is easy to cause"Water lock" in the area near the borehole, thus seriously hindering the efficiency of gas extraction. In order to solve the above problems, we deepened the study of more suitable for the upper hole fracturing resistance, hanging sand, anti-swelling, environmental protection and other requirements of cracking fluid: X3 thickening agent + P1 anti-expansion agent + J3 glue breaking agent, etc., and determined the matching S1 fracturing sand,In Songzao Coal Mine, the gas extraction effect is good after sand fracturing, and the average pure amount of gas extraction is 0.0036m³ / min, which is more than 2 times compared with water fracturing hole. The concentration of gas extraction is up to 65%, and it is 26% on average, which is more than 1 times compared with the concentration of water fracturing hole.The results provide parameter support for improving seam permeability and gas production efficiency, and provide important guidance for mine safety production.
Keywords: Coal seam permeability, Gas extraction, hydraulic fracturing, Coal, Fracturing fluid
Received: 16 Jan 2025; Accepted: 25 Jul 2025.
Copyright: © 2025 Liu, Zhang and Zhang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Jun Liu, China Coal Technology Engineering Group Chongqing Research Institute, Chongqing, China
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