蒲河煤矿综放工作面两巷锚喷支护技术研究.pdfVIP

摘 要 随着对锚杆支护技术理论及支护设计的不断认识和创新，锚杆支护成为了巷道 支护的主流。锚杆支护技术使原有的被动支护向主动支护转变，很好的解决了巷道 支护问题，尤其是软岩巷道，由于其岩性的特殊性，使原有的支护方式难以适应围 岩的变形等因素，巷道破坏严重。锚杆技术的发展，从根本上改善了巷道的支护状 况，保证了安全生产。 本文结合蒲河煤矿具体工程地质条件，首先在对蒲河煤矿综放工作面现有巷道 锚杆支护现状进行调研分析的基础上，通过对围岩基础参数（煤岩物理力学性质指 数、围岩松动圈、地应力等）的测定，分析研究了影响蒲河煤矿综放工作面两巷支 护的主要因素。基于围岩松动圈理论“锚喷网”支护设计机理和锚喷网支护设计方 法的基础上，提出了适合该矿综放工作面两巷的“锚杆+锚索+金属网+钢筋梯+ 喷射 混凝土”支护设计方案，并对支护方案进行 Flac 数值模拟试验和实施 200m 试验巷 道现场试验，辅之以现场矿压观测。通过试验巷道的宏观效果和矿压观测结果验证 设计方案的合理性和适用性，为该矿回采巷道使用锚杆支护提供一定的技术参考， 解决该矿综放工作面两巷支护难题。 关键词：围岩松动圈；锚杆；锚索 ；支护 Abstract With the constant awareness and innovation in bolting support technology theory and supporting design ， the bolting has become the mainstream of roadway. Bolting technology enables the original passive supporting to change to the active supporting ， which solve the roadway issue well especially the soft rock roadway. Because of its lithology specificity ， the soft rock roadway make the original supporting way difficult to adapt to the factors of surrounding rock’deformation and severely damage roadway. As the development of blot support technology ， it fundamentally improves the situation of the roadway supporting and ensures to product safely. In this paper ， we combine the specific engineering geological conditions of Puhe mine. Firstly ， basing on the investigation and analysis on the existing bolting roadway status in Puhe mine fully mechanized caving face ， through the determination of surrounding rock’s basic parameters (coal Physical and mechanical properties index ， rock loose ring and ground stress) ， analyse the impact of two major factors on Puhe mine fully mechanized caving face. Base on the surrounding rock loose technology and the mechanism and method of anchors-gunite-web