安全有效地增加煤层透气性、提高煤层气抽采效率是推动能源高效利用的关键。随着我国煤矿开采深度的增加，煤层气开采难度加大，瓦斯突出危险性愈加严重。膨胀致裂技术具有无噪声、无震动、无粉尘的独特优势，使其在煤层增透领域具有广阔的应用前景。通过对现有研究成果的调研分析，深入剖析了膨胀致裂材料反应机理与膨胀致裂增透机理，梳理了钻孔直径、间距、形状等参数对煤体致裂效果的影响，对膨胀致裂过程中煤体损伤力学模型（煤体损伤断裂模型和裂隙扩展模型）进行了总结，阐述了膨胀致裂技术在煤层增透领域的应用现状，并提出了膨胀致裂技术在煤层增透领域的研究方向与发展建议。

Safely and effectively increasing the permeability of coal seams and improving the efficiency of coalbed methane extraction is the key to promoting efficient energy utilization. With the increase of coal mining depth in China, the difficulty of coalbed methane mining is increasing, and the risk of gas outbursts is becoming more and more serious. The expansion fracturing technology has the unique advantages of no noise, no vibration, and no dust, which makes it have broad application prospect in the field of coal seam permeability enhancement. Through the investigation and analysis of the existing research results, the reaction mechanism of static expansion materials and the mechanism of expansion cracking and permeability improvement were analyzed, and the influence of parameters such as borehole diameter, spacing, and shape on the cracking effect of the coal body was combed, and the mechanical models of coal damage (coal damage fracture model and crack propagation model) in the process of expansion cracking were summarized, and the application status of expansion cracking technology in the field of coal seam permeability enhancement was expounded, and the research direction and development suggestions of expansion fracking technology in the field of coal seam permeability enhancement were proposed.