沿空留巷技术在综采放顶煤工作面的研究与实践

Research and Praction of Gob-side Entry Retaining Technology in Fully-mechanized Caving Face

以3313轨道运输顺槽沿空留巷为工程背景,通过高强度、高预应力的大断面巷道基本支护和针对沿空留巷顶底板剧烈变形的超前补强支护体系;合理严谨的超前切顶卸压体系;三维纺织结构混凝土支护体系;沿空留巷内顶板加强支护体系的实施,成功实现厚煤层坚硬顶板综采放顶煤工作面沿空留巷围岩的稳定控制。

Taking 3313 transport lane with gob-side entry retaining as engineering background,based on high-strength,high-prestressed large-section roadway basic support and violent deformation of the roof and floor of gob-side entry retaining,the paper proposes a series of systems,including a pre-reinforcement support system,a reasonable and rigorous advancing roof cutting pressure relief system,a three-dimensional textile structural concrete support system,and reinforcement support for the roof in the gob-side entry retaining.Their implementation successfully realized the stable control of the surrounding rock of the gob-side entry retaining with hard roof and thick seam.