复杂条件下综放工作面末采回撤期防灭火技术
Fire Preventing and Extinguishing Technology in End-mining and Withdrawal Period at Fully Mechanized Caving Face Under Complex Conditions
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摘要: 针对宽沟煤矿W1121工作面在冲击地压、涌水量大、大面积底鼓、高瓦斯等复杂条件下的末采回撤工作，采取“分段分区、多措并举、加强预测预报、综合治理”的自燃防治思路，将末采回撤期间防灭火工作分为2个阶段，根据2个阶段的不同特点制定并实施了有针对性的预测预报、注氮、注浆、管风堵漏、打钻注史达夫及优化瓦斯抽放系统等综合防灭火技术措施，实现了工作面的安全回撤。Abstract: For the end-mining and withdrawal work under complicated conditions, including rock burst, large water inflow, a large area of floor heave, high gas and so on, at Kuangou Coal Mine W1121 working face, taking idea of "dividing stages and areas, developing many measures simultaneously, strengthening forecasting and comprehensive treatment" to prevent and control spontaneous combustion, we divide fire-prevention work during end-mining and withdrawal period into two stages. According to the different characteristics of two stages, comprehensive technologies were developped and implemented for coal spontaneous combustion, including forecasting, nitrogen injection, slip casting, wind control and leaking stoppage, drilling hole and Shidafu injection, and optimization of gas drainage system, which achieves the safety retracement of working face.
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