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首页> 外文期刊>Advances in civil engineering >Coupling Technology of Deep-Hole Presplitting Blasting and Hydraulic Fracturing Enhance Permeability Technology in Low-Permeability and Gas Outburst Coal Seam: A Case Study in the No. 8 Mine of Pingdingshan, China
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Coupling Technology of Deep-Hole Presplitting Blasting and Hydraulic Fracturing Enhance Permeability Technology in Low-Permeability and Gas Outburst Coal Seam: A Case Study in the No. 8 Mine of Pingdingshan, China

机译：耦合技术对低渗透和燃气突出煤层煤层气压裂增强渗透性技术的影响：以中国平顶山8号矿区为例

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The current study aims to analyze the principles of integrated technology of explosion to tackle the problems of coal seam high gas content and pressure, developed faults, complex structure, low coal seam permeability, and high outburst risk. Based on this, we found through numerical simulation that as the inclination of the coal seam increases, the risk of coal and gas outburst increases during the tunneling process. Therefore, it is necessary to take measures to reduce the risk of coal and gas outburst. We conducted field engineering experiments. Our results show that the synergistic antireflection technology of hydraulic fracturing and deep-hole presplitting blasting has a significant antireflection effect in low-permeability coal seams. After implementing this technology, the distribution of coal moisture content was relatively uniform and improved the influence range of direction and tendency. Following 52 days of extraction, the average extraction concentration was 2.9 times that of the coal seam gas extraction concentration under the original technology. The average scalar volume of single hole gas extraction was increased by 7.7 times. Through field tests, the purpose of pressure relief and permeability enhancement in low-permeability coal seams was achieved. Moreover, the effect of gas drainage and treatment in low-permeability coal seams was improved, and the applicability, effectiveness, and safety of underground hydraulic fracturing and antireflection technology in low-permeability coal seams were verified. The new technique is promising for preventing and controlling gas hazards in the future.
机译：目前的研究旨在分析爆炸综合技术原则，以解决煤层高煤气含量和压力，发达的故障，复杂结构，低煤层渗透性和高爆发风险的问题。基于此，我们通过数值模拟发现，随着煤层的倾斜度增加，隧道过程中煤和煤气突出的风险增加。因此，有必要采取措施降低煤炭和燃气突出的风险。我们进行了现场工程实验。我们的研究结果表明，液压压裂和深孔隔板爆破的协同抗反射技术在低渗透煤层中具有显着的抗反射效果。实施该技术后，煤水分含量的分布相对均匀，改善了方向和趋势的影响范围。在52天的提取后，平均提取浓度为原始技术下的煤层气提取浓度的2.9倍。单孔气体提取的平均标量体积增加7.7倍。通过现场测试，实现了低渗透煤层中的减压和渗透性增强的目的。此外，验证了气体排水和在低渗透煤层中的处理和处理在低渗透煤层中的地下液压压裂和抗反射技术的适用性，有效性和安全性。新技术是有希望防止和控制未来的气体危害。

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