止浆墙注浆封堵D21冻结管环形空间水的应用

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麦垛山井田地处鸳鸯湖矿区最南端,矿井水文地质类型属复杂型,采用主斜-副立井、单水平开拓方式。回风立井辅助水平(西侧)连接处施工至冻结管位置,岩层受扰动发生了沿D21冻结管淋水、涌水、冒顶事故,涌水量最大达80m^3/h。对此,麦垛山煤矿采用了浇筑止浆墙注浆堵水方案,成功封堵了冻结管环形空间出水,确保了回风立井与回风立井辅助水平西侧连接处的顺利贯通。
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