尾砂胶结充填体的水泥含量测定试验研究
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摘要
矿山充填普遍存在充填料浆离析,导致采场充填体均匀性差和充填体强度降低等问题,目前关于充填料浆离析的研究大都局限在定性描述,尚无定量评价方法,主要原因是还无法准确测定尾砂胶结充填体中水泥的含量。为此,通过试验研究系统分析了充填体龄期和充填料浆质量浓度对EDTA滴定法的影响,论证了EDTA滴定法测尾砂胶结充填体水泥含量的有效性,探索出一种新的充填料浆离析和充填体不均性定量评价方法,提出了矿山原位采场充填质量评估的指标。
The problem of filling slurry segregation is prevalent in mine filling,which leads to the poor uniformity of the filling body and the decrease of the strength of the filling body. At present,the study of filling slurry separation is mostly limited to qualitative description. There is no quantitative evaluation method mainly because the content of cement in cemented tailings backfill cannot be measured accurately.The effect of filling body age and filling slurry mass concentration on EDTA titration method were systematically analyzed by conducting experimental studies. The effectiveness of EDTA titration method for measuring the cement content in cemented tailings backfill was demonstrated. An effective technique for studying the segregation of filling slurry and the uniformity of filling body was put forward,and the effective evaluation indexes for measuring the filling quality of mine in-situ mining field were proposed.
The problem of filling slurry segregation is prevalent in mine filling,which leads to the poor uniformity of the filling body and the decrease of the strength of the filling body. At present,the study of filling slurry separation is mostly limited to qualitative description. There is no quantitative evaluation method mainly because the content of cement in cemented tailings backfill cannot be measured accurately.The effect of filling body age and filling slurry mass concentration on EDTA titration method were systematically analyzed by conducting experimental studies. The effectiveness of EDTA titration method for measuring the cement content in cemented tailings backfill was demonstrated. An effective technique for studying the segregation of filling slurry and the uniformity of filling body was put forward,and the effective evaluation indexes for measuring the filling quality of mine in-situ mining field were proposed.
引文
[1]蔡嗣经,王洪江.现代充填理论与技术[M].北京:冶金工业出版社,2012.
[2]周爱民.中国充填技术概述[J].矿业研究与开发,2004,24(增刊1):1-7.
[3]李炜,周旭,廖美权.高浓度充填料浆离析分析及控制[J].世界有色金属,2011(4):74-75.
[4]冯巨恩,吴超,姚振巩.絮凝剂改善充填效果的试验研究[J].金属矿山,2005(10):12-14.
[5]单位交通部公路科学研究院.公路工程无机结合料稳定材料试验规程:JTG E51-2009[M].北京:人民交通出版社,2009.
[6]王保田,张永奇,宋为广,等. EDTA滴定法检测水泥搅拌桩水泥含量影响因素试验研究[J].科学技术与工程,2015,15(3):270-274.
[7]邱少华. EDTA法测水泥含量的应用[J].山西建筑,2004,30(19):115-116.
[8]陈保平. EDTA滴定法在石灰处理膨胀土中的应用研究[J].中外公路,2007,27(3):218-221.
[9]许爱国. EDTA滴定法影响因素的讨论[J].长沙铁道学院学报(社会科学版),2012,13(2):200-201.
[10]李艳红.分析化学[M].北京:石油工业出版社,2008.
[2]周爱民.中国充填技术概述[J].矿业研究与开发,2004,24(增刊1):1-7.
[3]李炜,周旭,廖美权.高浓度充填料浆离析分析及控制[J].世界有色金属,2011(4):74-75.
[4]冯巨恩,吴超,姚振巩.絮凝剂改善充填效果的试验研究[J].金属矿山,2005(10):12-14.
[5]单位交通部公路科学研究院.公路工程无机结合料稳定材料试验规程:JTG E51-2009[M].北京:人民交通出版社,2009.
[6]王保田,张永奇,宋为广,等. EDTA滴定法检测水泥搅拌桩水泥含量影响因素试验研究[J].科学技术与工程,2015,15(3):270-274.
[7]邱少华. EDTA法测水泥含量的应用[J].山西建筑,2004,30(19):115-116.
[8]陈保平. EDTA滴定法在石灰处理膨胀土中的应用研究[J].中外公路,2007,27(3):218-221.
[9]许爱国. EDTA滴定法影响因素的讨论[J].长沙铁道学院学报(社会科学版),2012,13(2):200-201.
[10]李艳红.分析化学[M].北京:石油工业出版社,2008.