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井下采空区发生自燃发火在确定疑似火点的情况下,能否将钻孔通过冒落带、裂隙带到达火点附近成为灭火的关键。针对打钻过程中出现钻孔弯曲的原因从地质因素、工艺技术因素进行分析,介绍了采空区下注浆钻杆的特殊要求和应用实例。
Spontaneous combustion occurs in the underground mined-out area In the case of determining the suspected fire point, whether the borehole can pass the caving zone and the fissure zone reach the fire point becomes the key to extinguish the fire. Aiming at the reasons of drilling bending in the process of drilling, this paper analyzes the geological factors and technological factors, and introduces the special requirements and application examples of the grouting drill pipe under the goaf.