工程科学学报，第40卷，第8期：925-930,2018年8月 Chinese Journal of Engineering,Vol.40,No.8:925-930,August 2018 DOI:10.13374/j.issn2095-9389.2018.08.005;http://journals.ustb.edu.cn 低温对某铜矿膏体充填早期强度影响及工程建议 王 勇12)，吴爱祥)四，王洪江)，杨柳华)，王贻明)，靳斐”，杨锡祥》，周发陆》 1)北京科技大学土木与资源工程学院，北京1000832)中国矿业大学煤炭资源与安全开采国家重点实验室，徐州221116 3)伽师县铜辉矿业有限责任公司，喀什844000 ☒通信作者，E-mail:wuaixiang@126.com 摘要以伽师铜矿旷冬季膏体料为背景，制备不同水质、水泥种类、水泥添加方式、泵送剂掺量和骨料添加量的膏体试块129 个，膏体温度控制在8~12℃，放置于温度20℃、湿度95%的标准养护箱，待养护龄期为3、7和28d时测其单轴抗压强度.实 验结果表明，膏体7d和28d强度分别是3d强度的1.44倍、2.4倍，7d强度演化规律符合2℃时水化反应度演化进程，强度 发展较慢，而28强度演化规律符合20℃时水化反应度发展进程，温度对其后期强度影响较小.基于低温对膏体7d内早期 强度影响较大这一现象，提出了充填系统添加高温补水点的工程建议：根据伽师铜矿膏体实际配比，理论计算出高温补水量 为6-8m3.h,水温70~100℃，膏体温度可由6℃提高至15-19℃：建议采用工业热水器提供高温水，热水器功率保守选择 400kW,充填成本每方充填料增加2.9元人民币 关键词膏体：低温：水化度：强度：高温补水 分类号TD823.7 Effect of low temperature on early strength of cemented paste backfill from a copper mine and engineering recommendations WANG Yong),WU Ai-xiang WANG Hong-jiang,YANG Liu-hua,WANG Yi-ming,JIN Fei,YANG Xi-xiang,ZHOU Fa-lu2) 1)School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China 3)Jiashi County Tonghui Mining Co.,Ltd.,Kashgar 844000,China Corresponding author,E-mail:wuaixiang@126.com ABSTRACT Low winter temperatures are a widespread concern for mines in China that use cemented paste backfill CPB).A low environmental temperature has a significant effect on the CPB temperature,which can affect its hydration rate and early strength.Using paste material from the Jiashi Copper Mine (JCM)in winter,this paper prepared a total of 129 specimens and investigated the effect on these specimens of different amounts of water and cement,the method for adding cement,the dosage of the pumping agent,and the amount of aggregate used.The prepared specimens had a temperature range of 8-12 C and were cured in a standard curing box with a temperature of 20C and humidity of 95%.After curing periods of 3,7,and 28d,the paper performed uniaxial compressive strength (UCS)tests on the specimens.The test results show that the UCS values of the 7 d and 28 d specimens are 1.44-fold and 2.4-fold those of the 3d specimens,respectively.The 7d UCS evolution accords with a 2C hydration progress,which leads to gradual strength development.However,the 28d UCS evolution accords with a20C hydration progress.This indicates that the temperature of the paste has a slight effect on its long-term strength.Based on the effect of low temperature on the strength of the 7d paste,the paper proposed 收稿日期：2017-11-06 基金项目：国家重点研发计划资助项目(2018Y℉C0603705);中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金资助项目 (SKLCRSM18KF006):中央高校基本科研业务费专项资金资助项目(FRF-TP-17-024A1):中国博士后科学基金资助项目(2017M620622)工程科学学报,第 40 卷,第 8 期:925鄄鄄930,2018 年 8 月 Chinese Journal of Engineering, Vol. 40, No. 8: 925鄄鄄930, August 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 08. 005; http: / / journals. ustb. edu. cn 低温对某铜矿膏体充填早期强度影响及工程建议 王 勇1,2) , 吴爱祥1)苣 , 王洪江1) , 杨柳华1) , 王贻明1) , 靳 斐1) , 杨锡祥3) , 周发陆3) 1) 北京科技大学土木与资源工程学院, 北京 100083 2) 中国矿业大学煤炭资源与安全开采国家重点实验室, 徐州 221116 3) 伽师县铜辉矿业有限责任公司, 喀什 844000 苣 通信作者, E鄄mail: wuaixiang@ 126. com 摘 要 以伽师铜矿冬季膏体料为背景,制备不同水质、水泥种类、水泥添加方式、泵送剂掺量和骨料添加量的膏体试块 129 个,膏体温度控制在 8 ~ 12 益 ,放置于温度 20 益 、湿度 95% 的标准养护箱,待养护龄期为 3、7 和 28 d 时测其单轴抗压强度. 实 验结果表明,膏体 7 d 和 28 d 强度分别是 3 d 强度的 1郾 44 倍、2郾 4 倍,7 d 强度演化规律符合 2 益 时水化反应度演化进程、强度 发展较慢,而 28 d 强度演化规律符合 20 益时水化反应度发展进程,温度对其后期强度影响较小. 基于低温对膏体 7 d 内早期 强度影响较大这一现象,提出了充填系统添加高温补水点的工程建议:根据伽师铜矿膏体实际配比,理论计算出高温补水量 为 6 ~ 8 m 3·h - 1 ,水温 70 ~ 100 益 ,膏体温度可由 6 益提高至 15 ~ 19 益 ;建议采用工业热水器提供高温水,热水器功率保守选择 400 kW,充填成本每方充填料增加 2郾 9 元人民币. 关键词 膏体; 低温; 水化度; 强度; 高温补水 分类号 TD823郾 7 收稿日期: 2017鄄鄄11鄄鄄06 基金项目: 国家重点研发计划资助项目(2018YFC0603705); 中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金资助项目 (SKLCRSM18KF006); 中央高校基本科研业务费专项资金资助项目(FRF鄄鄄TP鄄鄄17鄄鄄024A1); 中国博士后科学基金资助项目(2017M620622) Effect of low temperature on early strength of cemented paste backfill from a copper mine and engineering recommendations WANG Yong 1,2) , WU Ai鄄xiang 1) 苣 , WANG Hong鄄jiang 1) , YANG Liu鄄hua 1) , WANG Yi鄄ming 1) , JIN Fei 1) , YANG Xi鄄xiang 3) , ZHOU Fa鄄lu 3) 1) School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China 3) Jiashi County Tonghui Mining Co. , Ltd. , Kashgar 844000, China 苣 Corresponding author, E鄄mail: wuaixiang@ 126. com ABSTRACT Low winter temperatures are a widespread concern for mines in China that use cemented paste backfill (CPB). A low environmental temperature has a significant effect on the CPB temperature, which can affect its hydration rate and early strength. Using paste material from the Jiashi Copper Mine (JCM) in winter, this paper prepared a total of 129 specimens and investigated the effect on these specimens of different amounts of water and cement, the method for adding cement, the dosage of the pumping agent, and the amount of aggregate used. The prepared specimens had a temperature range of 8鄄鄄12 益 and were cured in a standard curing box with a temperature of 20 益 and humidity of 95% . After curing periods of 3, 7, and 28 d, the paper performed uniaxial compressive strength (UCS) tests on the specimens. The test results show that the UCS values of the 7 d and 28 d specimens are 1郾 44鄄fold and 2郾 4鄄fold those of the 3 d specimens, respectively. The 7 d UCS evolution accords with a 2 益 hydration progress, which leads to gradual strength development. However, the 28 d UCS evolution accords with a 20 益 hydration progress. This indicates that the temperature of the paste has a slight effect on its long鄄term strength. Based on the effect of low temperature on the strength of the 7 d paste, the paper proposed