会宝岭铁矿全尾砂废石复合充填体沉降试验

全尾砂废石复合充填体沉降是一个复杂的非牛顿流体与固体混合物的连续介质力学加载过程，难以通过经验估算或理论推导获得其沉降规律。为研究会宝岭铁矿全尾砂-废石复合充填体沉降问题，通过相似模型试验的方法,对不同比例（高度）全尾砂、废石组成的复合充填进行室内试验模拟。结果分析表明：复合充填体中废石所占比例与其总沉降量呈递减函数关系；复合充填体总沉降量与时间的拟合关系为递减对数关系，且拟合曲线在15 d时斜率明显减小，故在15 d后复合充填体沉降量趋于稳定，可进行顶板胶结作业；比较不同废石比例的复合充填体沉降稳定所需时间，1/2废石比例的复合充填体沉降稳定最快。

Settlement Tests of Unclassified Tailings Waste Rock Compound Filling Body in Huibaoling Iron Mine

The settlement of unclassified tailings waste rock compound filling body is a complex continuum mechanics loading process of non-Newtonian fluid and solid mixture，so it is difficult to obtain the settlement laws through the theoretical derivation or experience.In order to investigate the settlement of unclassified tailings waste rock compound filling body in Huibaoling Iron Mine，the similarity model test method is adopted to make the indoor simulation experiment on composite filling body with different proportions (height) of unclassified tailings and waste rock.The results showed that the proportion of waste rocks in compound filling body has a decreasing function with the total settlement amount.The fitting of total settlement amount of the compound filling body with time shows a decreasing logarithmic relationship among them.And the fitting curve significantly declined at 15d，so the settlement of compound filling approached to be stable after 15d，and roof cementation can be operated.After contrast on the time that required by settlement of compound filling with different proportions of waste rock，compound filling body with 1/2 ratio of waste rock has the fastest settlement.