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金属矿山尾矿问题及其综合利用与治理

蔡嗣经,杨鹏

《中国工程科学》 2000年第2卷第4期页码 89-92

摘要：

我国金属矿山在地面积存的尾矿已达40多亿t，并以每年约2.1亿t的速度在增长。金属矿山尾矿的主要特点为颗粒极细、数量极大、毒性很强、浓度很低。尾矿库占用大量土地，尾矿库工程事故，尾矿对地面环境和地下水源的污染等，迫切需要采用新技术开展对尾矿综合利用和治理的研究与开发，包括回收利用尾矿中的金属和非金属元素，利用尾矿制作建筑材料或磁性肥料；采用各种措施全面治理尾矿，如设立地下尾矿库，利用地面尾矿库作排土场，尾矿膏体地面无坝堆放与同步复垦等，其最终目标是建立“无尾矿山”。

关键词：金属矿山尾矿环境污染地下尾矿库尾矿膏体无尾矿

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尾矿坝溃决的剖析与未来的警示

Jane Palmer

《工程（英文）》 2019年第5卷第4期页码 605-606 doi: 10.1016/j.eng.2019.07.009

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Time- and temperature-dependence of compressive and tensile behaviors of polypropylene fiber-reinforced cemented paste backfill

《结构与土木工程前沿（英文）》 2021年第15卷第4期页码 1025-1037 doi: 10.1007/s11709-021-0741-9

摘要： The understanding of compressive and tensile behaviors of polypropylene fiber-reinforced cemented paste backfill (FR-CPB) play crucial roles in the successful implementation of reinforcement technique in underground mine backfilling operations. However, very limited studies have been performed to gain insight into the evolution of compressive and tensile behaviors and associated mechanical properties of FR-CPB under various curing temperatures from early to advanced ages. Thus, this study aims to investigate the time (7, 28, and 90 d)- and temperature (20°C, 35°C, and 45°C)-dependence of constitutive behavior and mechanical properties of FR-CPB. The obtained results show that pre- and post-failure behaviors of FR-CPB demonstrate strongly curing temperature-dependence from early to advanced ages. Moreover, the pseudo-hardening behavior is sensitive to curing temperature, especially at early ages. Furthermore, the mechanical properties including elastic modulus, material stiffness, strengths, brittleness, cohesion, and internal friction angle of FR-CPB show increasing trends with curing temperature as curing time elapses. Additionally, a predictive model is developed to capture the strong correlation between compressive and tensile strength of FR-CPB. The findings of this study will contribute to the successful implementation of FR-CPB technology.

关键词： cemented paste backfill fiber reinforcement constitutive behavior temperature tailings

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metal accumulation and phytostabilization potential of dominant plant species growing on manganese mine tailings

YANG Shengxiang,LIANG Shichu,YI Langbo,XU Bibo,CAO Jianbing,GUO Yifeng,ZHOU Yu

《环境科学与工程前沿（英文）》 2014年第8卷第3期页码 394-404 doi: 10.1007/s11783-013-0602-4

摘要： Screening plants that are hypertolerant to and excluders of certain heavy metals plays a fundamental role in a remediation strategy for metalliferous mine tailings. A field survey of terrestrial higher plants growing on Mn mine tailings at Huayuan, Hunan Province, China was conducted to identify candidate species for application in phytostabilization of the tailings in this region. In total, 51 species belonging to 21 families were recorded and the 12 dominant plants were investigated for their potential in phytostabilization of heavy metals. Eight plant species, , , , , , , , and accumulated much lower concentrations of heavy metals in shoots and roots than the associated soils and bioconcentration factors (BFs) for Cd, Mn, Pb and Zn were all<1, demonstrating a high tolerance to heavy metals and poor metals translocation ability. The field investigation also found that these species grew fast, accumulated biomass rapidly and developed a vegetation cover in a relatively short time. Therefore, they are good candidates for phytostabilization purposes and could be used as pioneer species in phytoremediation of Mn mine tailings in this region of South China.

关键词： Mn mine tailings heavy metal accumulation phytostabilization