| 供稿: 胶结充填体早期损伤对后期力学性能的影响(网络首发) 甘德清，张雅洁，刘志义，路燕泽 | 时间: 2024-01-24 | 次数: |
甘德清,张雅洁,刘志义,等.胶结充填体早期损伤对后期力学性能的影响[J].河南理工大学学报(自然科学版)，doi:10.16186/j.cnki.1673-9787.2021120073
GAN D Q,ZHANG Y J,LI Z Y,et al．Effect of early damage of tailings cemented backfill on later mechanical properties［J］.Journal of Henan Polytechnic University( Natural Science) ，doi:10.16186/j.cnki.1673-9787.2021120073
胶结充填体早期损伤对后期力学性能的影响(网络首发)
甘德清1，2，3，4，张雅洁1，2，3，4，刘志义1，2，3，4，路燕泽5
（1.华北理工大学 矿业工程学院，河北 唐山 063210；2.华北理工大学 河北省矿业开发与安全工程实验室，河北 唐山 063210；3.华北理工大学 矿产资源绿色开发与生态修复协同创新中心，河北 唐山 063210；4.华北理工大学 河北省矿山绿色智能开采技术创新中心，河北 唐山 063210；5.河北钢铁集团沙河中关铁矿有限公司，河北 邢台 054100）
摘要: 目的 为了探明胶结充填体早期受损对其后期承载性能的影响， 方法 通过开展早期受损充填体经养护一定龄期后的单轴压缩试验，以损伤龄期和损伤程度为变量，以受损充填体的后期变形特性、抗压强度、弹性模量为后期力学性能评价指标，分析充填体损伤龄期和损伤程度对其后期力学性能的影响规律。 结果 结果表明：在同一损伤龄期下，充填体在80%压损下后期峰值应力及残余应力最低；损伤程度对龄期为3d和7d的充填体后期变形特性影响较小，对龄期为14d和21d的充填体后期变形特性弱化作用较大；在80%以下的损伤程度对龄期为3d和7d充填体后期抗压强度影响较小，各个损伤程度对龄期为14d和21d充填体后期抗压强度影响较大，损伤程度越大，后期抗压强度越低；各个龄期的充填体后期弹性模量均随压损程度的增大而增大。养护龄期为14d之后的充填体受损后对其后期力学性能影响显著，且损伤程度对龄期为14d之后的充填体后期力学影响影响显著。 结论 研究结果可为上向水平充填采矿方法中充填质量控制提供理论指导意义。
关键词: 尾砂胶结充填体；早期损伤；应力-应变关系；抗压强度；力学性能
中图分类号：TD853
doi:10.16186/j.cnki.1673-9787.2021120073
基金项目:河北省自然科学基金资助项目（E2021209127）；国家自然科学基金资助项目（52204134）；中央引导地方科技专项项目资助（236Z4105G）
收稿日期：2021-12-21
修回日期：2023-10-10
网络首发日期：
Effect of early damage of tailings cemented backfill on later mechanical properties
GAN Deqing1，2，3，4，ZHANG Yajie1，2，3，4，LIU Zhiyi1，2，3，4，LU Yanze5
（1.School of Mining Engineering，North China University of Science and Technology，Tangshan 063210，Hebei,China;2.Development and Safety Key Laboratory of Hebei Province，North China University of Science and Technology，Tangshan 063210，Hebei，Chin;.3.Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources，North China University of Science and Technology，Tangshan 063210，Hebei,China;4.Mine Green Intelligent Mining Technology Innovation Center of Hebei Province，North China University of Science and Technology，Tangshan 063210，Hebei,China;5.Shahe Zhongguan Iron Ore Co.，Ltd.，Hebei Iron and Steel Group，Xingtai 054100，Hebei,China）
Abstract: Objective To explore the impact of early damage to cemented tailings backfill on its later bearing performance. Methods Uniaxial compression tests were conducted on early damaged backfill after a certain age of maintenance.The damage age and degree were used as variables，and the later deformation characteristics，compressive strength，and elastic modulus of the damaged filling body were used as evaluation indicators for the later mechanical properties.The influence of the damage age and degree on the later mechanical properties of the filling body was analyzed. Results The results show that: at the same damage age，the late peak stress and residual stress of the backfill at 80% compression loss are the lowest;the degree of damage has less influence on the late deformation characteristics of the backfill with the age of 3 d and 7 d，and has a greater weakening effect on the late deformation characteristics of the backfill with the age of 14 d and 21 d;the degree of damage below 80% has less influence on the late compressive strength of the backfill with the age of 3 d and 7 d.Each degree of damage to the age of 14d and 21d filling body late compressive strength has a greater impact，the greater the degree of damage，the lower the late compressive strength;each age of the filling body late elastic modulus increases with the increase in the degree of compression damage.The damage to the filling body after 14 days of maintenance has a significant impact on its later mechanical properties，and the degree of damage has a significant impact on the later mechanical properties of backfill after 14 days of maintenance. Conclusion The research results can provide theoretical guidance for filling quality control in upward horizontal filling mining methods.
Key words: cemented backfill;early damage;stress-strain relationship;compressive strength;mechanical properties
CLC: TD853
