在2006年发表的《我国沿空留巷支护技术发展现状及改进建议》一文的基础上，总结了21世纪以来我国沿空留巷技术的新发展，包括巷旁充填的施工工艺与方法，由高水、膏体充填发展为柔模墙体及超前柱式支护，使得支护强度和隔绝密闭性有了极大地提升，并且具有了一定柔性以适应顶板的下沉；经过20余年的发展，沿空巷道巷内基本支护具有了高预紧力、高强度、高刚度和大延伸率的特性，能够有效控制巷道围岩的大变形，实现及时主动支护，并普遍辅以单体支柱作为巷内补强支护，进一步保持围岩的稳定性与完整性；统计分析了部分沿空巷道的支护形式及留巷效果，愈发说明了沿空留巷的成功与否是巷旁支护和巷内支护共同作用的结果。介绍了无巷旁充填切顶卸压沿空留巷新技术，包括卸压原理、切顶方法、切顶参数及切顶后巷内的支护方式及其工程应用等。阐述了近年来我国在沿空留巷理论研究方面取得的新成果，包含充填体的切顶阻力和支护阻力，充填体与围岩之间的相互作用关系及受力变形特征，切顶卸压沿空留巷的围岩活动规律及其与支护体之间的相互作用关系等。指出了我国沿空留巷技术在巷旁支护、巷内支护及相关理论研究方面存在的技术问题与科学问题。最后从支护设计、围岩控制、研究方法、技术装备等方面出发，提出了今后我国沿空留巷技术的发展改进建议。

Based on the article of “Status Quo and Suggestions for the Technology Development of Support along Gob-Side Entry Retaining in China” the work summarized the new technological development of gob-side entry retaining in China since the 21st century including the construction technology and method of gob-side fill. It develops from high-water and paste filling to soft mold walls and advanced pillar support. Support strength and isolated tightness have been greatly improved, with certain flexibility to adapt to roof settling. Basic support in the roadway along gob-side entry retaining has high preload, high strength, high stiffness, and large elongation after more than 20 years of development, which can control the large deformation of the surrounding rocks of the roadway and realize timely and active support. Single pillars are generally supplemented as reinforced support in the roadway to further maintain the stability and integrity of surrounding rocks. Statistical analysis shows that the key to the success of gob-side entry retaining is the combination of roadside support and support in the roadway. The new technology of gob-side entry retaining with gob-side fill and roof-cutting pressure relief was introduced, including the principle of pressure relief, the method and parameters of roof cutting, and the support method in the roadway after roof cutting and its engineering application, etc. The work has expounded the new research achievements on gob-side entry retaining in China recently, e.g., the roof-cutting resistance and support resistance of the filling body, the interaction relationship between the filling body and surrounding rocks, stress deformation characteristics, roof-cutting pressure relief, and the surrounding rock activity of the roof-cutting pressure relief of gob-side entry retaining and its interaction with the supporting body. Technical and scientific problems of gob-side entry retaining were pointed out in roadside support and support in a roadway in China. Suggestions for the future development of China's technology along the empty alley were proposed from support design, surrounding rock control, research methods, and technical equipment.

0 引言
1 近20年来我国沿空留巷支护技术的发展
1.1 巷旁充填沿空留巷支护技术
1.1.1 巷旁支护技术
1.1.2 巷内支护技术
1.2 无巷旁充填切顶卸压沿空留巷技术
2 沿空留巷理论研究
2.1 有巷旁充填沿空留巷理论研究
2.1.1 巷旁充填体研究
2.1.2 上覆岩层活动规律研究
2.1.3 底板活动规律研究
2.2 无巷旁充填切顶卸压沿空留巷理论研究
3 存在问题及改进建议
3.1 我国沿空留巷技术存在的问题
3.1.1 沿空留巷存在的技术问题
3.1.2 沿空留巷存在的科学问题
3.2 沿空留巷技术的改进建议
4 结语