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DOI:
有色金属(矿山部分):2021,73(2):39-46
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高掺量粉煤灰注浆材料在采空区治理中的应用
张开诚1,张 超2,王德全1,李 杨2,宋洪涛1
((1. 山东黄金矿业(莱州)有限公司 三山岛金矿,山东 莱州,261442; 2. 北京科技大学 土木与资源工程学院,北京 100083))
Application of high content fly ash grouting material in goaf treatment
ZHANG Kaicheng1, ZHANG Chao2, WANG Dequan1, LI Yang2, SONG Hongtao1
((1.Sanshandao Gold Mine of Shandong Gold Mining Industry Co.,Ltd.,Laizhou Shandong 261442,China; 2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083,China))
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投稿时间:2020-07-01    修订日期:2020-07-17
中文摘要: 为减少矿山在综合治理工作中的成本问题,进行“粉煤灰掺量水泥注浆材料配比”实验研究。设计正交实验进行粉煤灰-水泥注浆材料析水率、结实率、抗压强度研究,对各实验方案可行性进行研究并优选处最优方案并进行现场工业实验研究。研究结果表明:固相比为单轴抗压强度的主要影响因素,水固比为析水率、结实率的主要影响因素,水玻璃掺量对试件抗压强度无显著影响;进行在不同固相比、水固比、养护龄期条件下强度的变化模型,固相比、水固比、养护龄期与强度呈正相关,固相比系数值相最大,表明固相比对强度的影响最为显著;选择使用二级粉煤灰,固相比4:6,水固比1:1.4,水玻璃掺量0%的方案最优方案,并进行工业实验,均满足现场需求。目前该矿山正逐步将此法推广到矿山其他充填接顶区域。
中文关键词: 粉煤灰  注浆  配比  抗压强度  回归分析
Abstract:In order to reduce the cost of mine in comprehensive treatment work, the experimental study of "the proportion of cement grouting material with fly ash content" was carried out. The orthogonal experiment was designed to study the water precipitation rate, seed setting rate and compressive strength of the fly-ash - cement grouting material. The feasibility of each experimental scheme was studied and the optimal scheme was selected and the field industrial experiment was conducted. The results show that the solid ratio is the main influencing factor of uniaxial compressive strength, the water-solid ratio is the main influencing factor of water extraction rate and seed setting rate, and the water glass content has no significant influence on the compressive strength. The strength change model was carried out under the conditions of different solid ratio, water-solid ratio and curing age. Solid ratio, water-solid ratio and curing age were positively correlated with strength, and the value of solid ratio coefficient was the largest, indicating that solid ratio had the most significant influence on strength. Second grade fly ash, solid ratio 4:6, water solid ratio 1:1.4 and water glass content 0% were selected as the optimal scheme, and industrial experiments were conducted to meet the site requirements. At present, this method is gradually applied to other filling roof areas in the mine.
文章编号:     中图分类号:TD 322    文献标志码:
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引用文本:
张开诚,张 超,王德全,李 杨,宋洪涛.高掺量粉煤灰注浆材料在采空区治理中的应用[J].有色金属(矿山部分),2021,73(2):39-46.
ZHANG Kaicheng,ZHANG Chao,WANG Dequan,LI Yang,SONG Hongtao.Application of high content fly ash grouting material in goaf treatment[J].NONFERROUS METALS(Mining Section),2021,73(2):39-46.

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