粉煤灰基胶结充填材料早强剂实验研究  

Experimental research on early strength agent of fly-ash-based cement filling material

作　　者：陈维新[1] 李凤义[1] 胡刚[1] 刘世明[1] 肖福坤[2] 关显华[1] 

机构地区：[1]黑龙江科技大学矿业研究院,哈尔滨150022 [2]黑龙江科技大学黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室,哈尔滨150022

出　　处：《黑龙江科技大学学报》2015年第3期265-269,共5页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省发展高技术产业(非信息产业)专项资金项目(FW12A018)

摘　　要：针对粉煤灰大量加入胶结材料后降低材料性能的问题,通过实验室正交实验,找到一种早强剂配方,得到粉煤灰占充填材料固体质量80%以上,水固比为0.94,8 h抗压强度大于0.9MPa,1 d抗压强度大于3 MPa、3 d抗压强度大于4 MPa,平均初凝时间100 min的最终材料配方。按配方比例在桃山矿井下工业实验后,证明该材料能够适应井下环境,具有快凝、早强、接顶率高等优良特点。This paper arises from the necessity of improving the poor-performance materialdue to the addition of a high volume of cementing material into fly ash by developing the best ratio of early strength agent using orthogonal experiment and producing an optimum formula of filling materials. The newly developed novel formula consists of fly ash accounting for over 80% of solid mass in filling material; the 0.94 of water-solid ratio; after-8-hour compressive strength more than 0. 9 MPa; after-1-d compressive strength more than 3 MPa; and after-3-d compressive strength more than 4 MPa; the average initial setting time of 100 min. The industrial experiment on the ratio formula in underground of Taoshan mine proves that the material capable of a better adaptation to the environment in underground mine boasts advantages such as rapid solidification,early strength,and higher rate of support.

关 键 词：充填材料 粉煤灰 早强剂 

分 类 号：TD823.7[矿业工程—煤矿开采]