深部采区轨道下山巷道钢丝绳网锚注支护技术研究

深井采准巷道支护技术一直影响到煤矿的安全高效生产。针对平煤五矿采区轨道下山工程地质条件，采用理论分析、现场工业性试验等方法，对轨道下山巷道变形原因、变形特征和支护原则等进行了系统研究并进行现场支护试验。研究结果表明：①围岩应力高、岩性差、受采动影响，以及锚注支护方式及参数不合理是造成轨道下山巷道变形破坏的主要原因；②提出了全断面支护、强化围岩自身承载能力、柔性喷层的支护原则，确定了钢丝绳网混凝土喷层结构、注浆锚杆和注浆参数等钢丝绳网锚注支护有关技术参数。钢丝绳网锚注支护在轨道下山巷道翻修中进行了工业性试验，巷道经历了两侧工作面采动影响后，能够满足生产安全需要，减少了巷道维修次数，现场试验取得了成功。

Study on the technology of bolt-grouting support with wire-rope mesh for track-dip roadway in deep mine district

Large deformation and difficult support of the surrounding rock of deep mine preparation roadway, affect the safe and efficient production of coal mine. Based on the geological conditions of track-dip roadway of the district in Pingdingshan No.5 Mine, with theoretical analysis and industrial field test, the paper studied the deformation causes, deformation characteristics and support principles for track-dip roadway, and in-situ support test. The results show that, (1) the surrounding rock stress is higher, the lithology is poor and coal face mining effects, and bolt-grouting support method and its parameters are unreasonable, which is the main reason for the surrounding rock deformation and failure of track-dip roadway; (2) the principles of full-section support, strengthening bearing capacity of surrounding rock, and flexible shotcrete support are proposed. The technical parameters of the wire-rope mesh shotcrete structure, grouting bolt and grouting parameters are determined. The wire-rope mesh bolt-grouting support was carried out in repair of track-dip roadway. After renovation, the track-dip roadway was sustained on its both side coal faces mining, which could meet the production safety requirements. Therefore, the field test was successful.