废石尾砂混合料浆流变特性及充填采场流动性试验  

Test Study on Rheological Characteristics for Mixed Filling Slurry Including Waste Rock and Tailings and Its Liquidity in the Stope

作　　者：杨志强[1,2] 高谦[1] 王永前[2] 王虎[1,2] YANG Zhiqiang GAO Qian WANG Yongqian WANG Hu(School of Civil and Resource Engineering,University of Science and Technology Beijing, Beijing 100083 ,China State Key Laboratory of Nickel and Cobalt Resources Comprehensive Utilization, Jinchuang Group Co., Ltd., Jinchang 737100, China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]金川集团股份有限公司,镍钴资源综合利用国家重点实验室,甘肃金昌737100

出　　处：《厦门大学学报（自然科学版）》2017年第2期294-299,共6页Journal of Xiamen University：Natural Science

基　　金：国家高技术研究发展计划(863计划)(SS2012AA062405);镍钴资源综合利用国家重点实验室项目(金科矿2015-01)

摘　　要：为了在金川充填采矿中实现废弃物资源化利用,开展了废石和尾砂两种骨料的混合充填料浆流变特性以及在采场中的流动性研究.首先基于现场取样进行废石和尾砂两种骨料的粒径级配分析,获得了满足充填骨料级配的废石与尾砂的质量比分别是6∶4和5∶5.然后针对这两种混合充填料,进行高浓度充填料浆坍落度试验.结果表明,两种混合充填料浆的坍落度大于20cm,满足金川矿山充填料浆泵送输件的要求;其质量分数在78%以上时属于高流态料浆,但废石与尾砂质量比为6∶4的混合充填料浆的流动性略优于质量比为5∶5的.通过混合充填料浆环管试验,确定了废石与尾砂质量比为6∶4、管径为130mm和质量分数为78%的混合充填料浆为合理管输参数.最后根据充填采场现场调查和强度分析,发现废石与尾砂质量比为6∶4和5∶5的混合充填料浆在采场中流动的坡面角分别为0.55°~1.19°和0.38°~1.26°,但料浆在下料点存在不明显的"锥堆"现象.采场中胶结充填体强度呈现"下高上低"现象,说明废石尾砂混合充填料浆仍存在轻度的沉淀离析.For the purpose of achieving waste＇s resource utilization in filling mining for Jinchuan mine, the test study on rheological characteristic for mixed filling slurry including waste rock and tailings and its liquidity in the stope carried out.First, two kinds of particle sizes of aggregate gradation based on field sampling are analyzed.Results show that the reasonable ratio for both the waste rock and full tailings are 6：4 and 5z5, which, for mixed filling materials, meet the filling aggregate gradation.Then the slump test of high concentration of filling slurry using the two mixed filling aggregate is implemented.Results show that two kinds of hybrid slump of the filling pulp are greater than 20 cm, which meet the pumping filling pulp conveying conditions in Jinchuan mine. Upon comparing two mixed slurries of liquidity, the ratio of 6：4 is slightly better than the ratio of 5：5, and the mixed filling slurry for mass fraction in the range of 78%-80% belongs to high flow slurry. Third, reasonable filling pulp pipeline parameters, of which the ratio of the waste stone and full railings is 6：4, pipe diameter is 130 mm and the mass fraction of 78 %, are determined based on the circular canal filling pulp.According to the filling stope intensity of field investigations and analyses, we find that flow-in-stope-slope angles of two mixed slurries （the mass ratio of waste rock and full tailings are 6：4 and 5：5） are 0. 55° to 1.19° and 0. 38° to 1.26°, respectively.But the ＂cone heap＂ phenomenon in material point is not obvious, indicating that the liquidity of filling pulp is better on the whole.Tbe up strength of cementing filling body in stope is higher than the low strength, demonstrating that filling pulp there is mild segregation.

关 键 词：废石 尾砂 混合充填料 粒径级配 流变特性 管道阻力 工业充填试验 

分 类 号：TD863[矿业工程—金属矿开采]