化工矿物与加工2026，Vol.55Issue(5)：9-15,7.DOI:10.16283/j.cnki.hgkwyjg.2026.05.002
掺纤维分层胶结充填体抗弯性能试验研究
Experimental study on flexural performance of fiber-mixed layered cemented backfill
郭志东 1陶治臣 1毕枥 1崔宇 1胡世超 1乔景超2
作者信息
- 1. 鞍钢基石矿业有限公司,辽宁 鞍山 114047
- 2. 中国矿业大学(北京)能源与矿业学院,北京 100083||中国矿业大学(北京)江西研究院,江西 赣州 341000
- 折叠
摘要
Abstract
The downward drift filling mining method uses the filling body as an artificial false roof to bear the upper load.However,this kind of cemented filling body is prone to bending failure under stress,which has a negative impact on the safety of mining operations.In order to improve the structural stability of cemented backfill,based on the con-trol variable method,three-point bending test was carried out to investigate the effects of curing age,cement-sand ratio and height of intermediate layer,fiber content and length on the flexural performance of layered cemented back-fill.The results show that the bending strength and fracture energy of the filling body increase with the extension of the curing age.The decrease of the cement-sand ratio of the middle layer will lead to the decrease of the bending strength and fracture energy.The height of the middle layer has a linear negative correlation with the fracture energy and bending strength.When the fiber content is 1%-2%and the length is 6-12 mm,the bending strength and frac-ture energy of the filling body are better.By reasonably regulating the curing age,intermediate layer and fiber parame-ters,the bending resistance of layered cemented backfill can be effectively improved.关键词
胶结充填体/纤维/抗弯强度/断裂能/三点弯曲试验/灰砂比/控制变量法Key words
cemented filling body/fiber/bending strength/fracture energy/three-point bending test/cement-sand ratio/control variable method分类
矿业与冶金引用本文复制引用
郭志东,陶治臣,毕枥,崔宇,胡世超,乔景超..掺纤维分层胶结充填体抗弯性能试验研究[J].化工矿物与加工,2026,55(5):9-15,7.
