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紧邻回采工作面窄煤柱沿空掘巷受邻近工作面侧向顶板破断、转动及稳定的动压影响后,小煤柱破裂,围岩稳定性急剧恶化。为控制围岩变形,防止大变形状态下支护结构失效,通过全长树脂锚固高强度预应力锚杆、“W”钢带和小孔径预应力锚索等围岩控制技术,形成高强高预应力组合支护结构,应用于漳村矿22采区2203回风巷围岩控制,取得了良好的支护效果。
Adjacent to the mining face of narrow coal pillar driving along the gob next to the roof by the side of the roof to break, rotating and stable dynamic pressure, the small coal pillar rupture, the stability of the surrounding rock sharp deterioration. In order to control the deformation of surrounding rock and prevent the failure of supporting structure in the condition of large deformation, the surrounding rock control technology such as full-length resin anchoring high-strength prestressed anchor, “W” steel strip and prestressed anchor with small aperture is used to form high strength High prestressed composite support structure, used in 22 mining 22 Zhangcun surrounding air return roadway control, and achieved good support effect.