改良型复合浆液在地表渣台火区的应用

Application of Modified Composite Slurry in Fire Area of Surface Slag Table

为了解决黑岱沟煤矿南帮S01综放工作面因上覆近距离高温松散体存在的裂隙使得工作面在正常回采过程中易受地表渣台高温火区有害气体侵入威胁及引起采空区遗煤自燃问题,基于传统预防性注浆防灭火理论基础,提出改变固液接触角、表面张力等特性进而达到提高浆液的动力学特性及润湿性能,实验过程找出具有最佳起泡性、润湿性等防灭火效果的复合浆液。实践证明,改良型复合浆液对工作面上覆渣台重点区域的注浆治理效果突出,能够确保工作面安全生产。

During the normal mining process,the working face is vulnerable to the harmful gas intrusion from high temperature fire area of surface slag table because of its fracture in the overlying surface of the fully mechanized caving face with close distance high temperature loose media of the south S01 fully mechanized caving face of Heidaigou Coal Mine,which will cause the spontaneous combustion of the residual coal in the goaf.Based on the theoretical basis of fire prevention of traditional precautionary grouting,the dynamic properties and wettability of the slurry can be improved by changing the liquid solid contact angle and surface tension.In the process of experiment,the composite slurry with the anti-fire effect of the best foaming and wettability is found.The practice show that the improved composite slurry has a prominent grouting effect on the key area of the overlying surface slag table in the working face,which can ensure the safe production of the working face.