摘要:
为了改善极细颗粒尾砂单独作为充填集料的胶结充填体固结硬化速度慢、强度偏低等问题,通过添加碎石的方法改变充填骨料的级配组成,由实验室对比试验可知,添加一定量碎石的胶结充填体强度可显著提高,这一点也由形式为指数函数拟合曲线的增长规律得以验证,从而确定了添加碎石可为井下开采作业提供可靠的安全保障,从减少胶凝材料用量的角度来看,节省的成本足以抵消加工碎石而增加的费用.因此,采用改性后的碎石-全尾砂充填材料在技术经济方面是合理的.
Abstract:
In order to facilitate the issues of slow consolidation and low strength using extremely fine particle tailings as filling aggregate, the compositions of aggregate were optimized by adding appropriate gravel.The laboratory tests showed that the addition of gravel could significantly improve the filling body strength, which was also verified from the growth law of exponential function of the fitting curve.Moreover, the addition of gravel could provide reliable security for underground mining operations, and the reduction of cementitious materials could make up for the additional cost of preparing gravel.Therefore, using modified gravel-full tailings filling material is reasonable in both technical and economic aspects.
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