Development and application of novel high‐efficiency composite ultrafine cement grouts for roadway in fractured surrounding rocks
Maolin Tian, Shaojie Chen, Lijun Han, Hongtian Xiao
煤炭资源是国家能源安全的“压舱石”，巷道的安全稳定是煤炭安全高效回采的重要保障。岩体注浆作为地下工程治理的关键技术在煤矿巷道围岩加固中得到了较为广泛的应用，但注浆材料性能在很大程度上决定着注浆加固的效果。鉴于此，本文研制了新型高效复合超细水泥基注浆材料，提出了破裂围岩巷道深浅孔耦合注浆加固技术，研究结果丰富了深部巷道灾害治理技术，对实现煤矿安全高效生产具有重要的工程价值。
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Maolin Tian, Shaojie Chen, Lijun Han, Hongtian Xiao. Development and application of novel high-efficiency composite ultrafine cement grouts for roadway in fractured surrounding rocks. Deep Underground Science and Engineering. 2024; 3(1): 53-69. doi:10.1002/dug2.12058
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本文简介：
深部软弱巷道围岩控制问题成为制约我国煤矿安全高效开采的技术瓶颈之一。岩体注浆作为地下工程治理的关键技术在煤矿巷道围岩加固中得到了较为广泛的应用，但注浆材料性能在很大程度上决定着注浆加固的效果。本文以超细水泥为胶凝材料，超细粉煤灰、超细矿渣及AUA膨胀剂、石膏等材料为外加剂，研发了新型高效复合超细水泥基注浆材料，探究了不同外加剂掺量对新型高效复合超细水泥基注浆材料的流变性能、泌水性、体积稳定性、微观结构特性及力学性能的影响规律，并针对破裂围岩巷道变形破坏特点，基于新型高效复合超细水泥基注浆材料，提出了破裂围岩巷道深浅孔耦合注浆加固技术并开展现场工业性试验，结果表明该注浆加固技术有效提升了巷道围岩稳定性。
The stability control technology issues of soft surrounding rock roadways in deep mines has become one of the technical bottlenecks restricting the safe and efficient mining of coal mines in China. Rock mass grouting, as a key technology for underground engineering treatment, has been widely used in the reinforcement of surrounding rock in coal mine roadways. However, the performance of grouting materials largely determines the effectiveness of grouting reinforcement. This paper used ultra-fine cement as the cementitious material, ultra-fine fly ash, ultra-fine slag, AUA expansion agent, gypsum, and other materials as additives. A novel high‐efficiency composite ultrafine cement grout was developed. The influence of different additive dosages on the rheological properties, water permeability, volume stability, microstructure characteristics, and mechanical properties of the novel high‐efficiency composite ultrafine cement grout was explored. According to the deformation and failure characteristics of fractured surrounding rock roadways, the coupling grouting reinforcement technology for deep and shallow holes in fractured surrounding rock roadways was proposed based on the new high‐efficiency CUC grouts, and the industrial field test was carried out. The results showed that the grouting reinforcement technology effectively improved the stability of surrounding rock roadways.
02
本文亮点：
以超细水泥为胶凝材料，超细粉煤灰、超细矿渣及AUA膨胀剂、石膏等材料为外加剂，研发了新型高效复合超细水泥基注浆材料。
探究了不同外加剂掺量对新型高效复合超细水泥基注浆材料的流变性能、泌水性、体积稳定性、微观结构特性及力学性能的影响规律。
基于新型高效复合超细水泥基注浆材料，提出了破裂围岩巷道深浅孔耦合注浆加固技术。
Ultrafine cement, ultrafine fly ash, ultrafine slag, and additives (superplasticizer, AUA, gypsum, and retarder) are used to develop highly efficient composite ultrafine cement.
The influence of different additive dosages on the rheological properties, water permeability, volume stability, microstructure characteristics, and mechanical properties of the novel high‐efficiency composite ultrafine cement grout is explored.
A coupling grouting reinforcement technology for deep and shallow holes in fractured surrounding rock tunnels is proposed based on the new high‐efficiency composite ultrafine cement grouts.
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通讯作者简介：
陈绍杰
陈绍杰，教授、博导，山东科技大学科技处处长。主要从事矿山岩石力学、开采沉陷控制与塌陷地治理方面的教学与科研工作。教育部长江学者特聘教授，全国优秀科技工作者，中国青年科技奖获得者，教育部新世纪优秀人才，山东省教学名师，山东省有突出贡献的中青年专家，山东省泰山学者青年专家，山东省自然科学杰出青年基金获得者，中国煤炭学会首席科学传播专家，全国煤炭青年科技奖、中国岩石力学与工程学会青年科技奖获得者。主持国家自然科学基金、国家重点研发计划子课题、山东省杰青、教育部新世纪优秀人才支持计划、山东省自然科学基金重大基础研究等省部级及以上课题16项。出版著作5部，授权美国、中国发明专利34项；获国家科技进步二等奖、山东省科技进步一等奖等科技奖励25项。
第一作者简介：
田茂霖
田茂霖，山东科技大学讲师，硕士生导师。主要从事深部岩体力学与围岩稳定控制理论与技术方面的科学研究。主持中国博士后科学基金1项，山东省博士后创新项目1项，相关企业委托项目5项，参与编写教材1部。在Engineering Failure Analysis、Bulletin of Engineering Geology and the Environment、《岩土力学》等期刊上发表学术论文20余篇，其中SCI、EI收录16篇，授权发明专利5项，获中国煤炭工业协会科学技术三等奖1项。是 “山东省高等学校青年创新团队”核心成员。
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