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钠盐改性铝基高固水材料在矿山老巷充填治理中的适应性研究
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作者 何国志 刘国磊 +4 位作者 马秋峰 董晓勇 郝喜庆 孟圣师 张东 《矿业研究与开发》 CAS 北大核心 2024年第10期36-46,共11页
针对工作面推采过老巷过程中面临的冲击地压、顶板管理等难题,研发了钠盐改性铝基高固水材料,可用于矿山井下老巷(空区)的充填治理。为探究该材料在矿山老巷原位充填治理中的适应性,采用室内试验、数值模拟、工程验证等方法,分析了该材... 针对工作面推采过老巷过程中面临的冲击地压、顶板管理等难题,研发了钠盐改性铝基高固水材料,可用于矿山井下老巷(空区)的充填治理。为探究该材料在矿山老巷原位充填治理中的适应性,采用室内试验、数值模拟、工程验证等方法,分析了该材料在老巷治理中的优势,给出了老巷在不同充填条件下围岩应力特征及变形破坏规律。研究表明:该材料单浆不凝固,混合料浆在4~15 min内初凝,1 d充填体强度可超过最终强度的70%,早强性明显、流动性好、密闭状态下充填体稳定性高、具有较高的固水性能;对老巷进行充填后,帮部煤体内应力峰值较未充填时降低,峰值位置向浅部转移,塑性区范围和围岩变形量减小;工程现场按水灰比8∶1进行充填,料浆输送距离超过1100 m,速凝性、早强性明显,充实率和接顶率高,冲击地压等各类灾害均得到有效控制,证明该材料可较好地适应于矿山废弃巷道治理。 展开更多
关键词 高固水材料 老巷治理 力学性能 充填开采
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官地矿22610工作面启封后防灭火技术研究 被引量:1
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作者 罗伟荣 《山东煤炭科技》 2019年第12期102-103,106,109,共4页
官地煤矿22610工作面面临严重的自然发火威胁,为了保障工作面启封后回采的安全,提出了采取采空区注氮、高固水材料洒注与强化监测监控相结合的综合防灭火技术措施。通过启封后10个多月自然发火指标气体的监测,表明该技术能够有效地防治... 官地煤矿22610工作面面临严重的自然发火威胁,为了保障工作面启封后回采的安全,提出了采取采空区注氮、高固水材料洒注与强化监测监控相结合的综合防灭火技术措施。通过启封后10个多月自然发火指标气体的监测,表明该技术能够有效地防治工作面自然发火,保证工作面的正常安全回采。 展开更多
关键词 自然发火 注氮 高固水材料 监测监控
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Effect of Curing Temperature on Mortar Based on Sustainable Concrete Material's and Poly-Carboxylate Superplasticizer
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作者 Ilham Aguida Belia Aissa Asroun Nabil Bella 《Journal of Civil Engineering and Architecture》 2014年第1期66-72,共7页
Nowadays, technologies in construction field have offered several kinds of chemical admixtures, which offer different behaviors at the fresh state of the batch and by consequence, it is resulted with different mechani... Nowadays, technologies in construction field have offered several kinds of chemical admixtures, which offer different behaviors at the fresh state of the batch and by consequence, it is resulted with different mechanical behaviors at the solid state of the mix. This study focused on the behavior of a new kind of admixture at fresh and solid states. Currently, the concrete material has become a very expensive material because the high price mostly of aggregates, representing the three quarters of the concrete components. By consequence, it costs money and on the other hand, it produces a lot of wastes. The main aspect which guides this study is to make a kind of concrete based mainly on local material and sustainable concrete material (SCM or waste material), which is one very abundant material in quality and quantity, under the current tendency the results obtained in this study summarize up the importance of the temperature during the development of the mechanical characteristics of mortar, mainly on compressive strength at age of 28 days. This is in the case of the addition of limestone crushed additive by percentage of substitution. 展开更多
关键词 MORTAR crushed limestone additive substitution ADMIXTURE temperature.
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