Abstract：
Tailings dust can negatively affect the surrounding environment and communities because the tailings are vulnerable to wind erosion. In this study, the effects of halides (sodium chloride [NaCl], calcium chloride [CaCl2], and magnesium chloride hexahydrate [MgCl2·6H2O]), and polymer materials (polyacrylamide [PAM], polyvinyl alcohol [PVA], and calcium lignosulfonate [LS]) were investigated for the stabilization of tailings for dust control. Erect milkvetch (Astragalus adsurgens), ryegrass (Lolium perenne L.), and Bermuda grass (Cynodon dactylon) were planted in the tailings and sprayed with chemical dust suppressants. The growth status of the plants and their effects on the mechanical properties of tailings were also studied. The results show that the weight loss of tailings was stabilized by halides and polymers, and decreased with increasing concentration and spraying amount of the solutions. The penetration resistance of tailings stabilized by halides and polymers increased with increasing concentration and spraying amount of the solutions. Among the halides and polymers tested, the use of CaCl2 and PAM resulted in the best control of tailings dust, respectively. CaCl2 solution reduces the adaptability of plants and therefore makes it difficult for grass seeds to germinate normally. PAM solutions are beneficial for the development of herbaceous plants. Among the three herbaceous species, ryegrass exhibited the best degree of development and was more suitable for growth in the tailings. The ryegrass plants planted in the tailings sprayed with PAM grew the best, and the root-soil complex that formed increased the shear strength of the tailings.
摘要：
尾矿粉尘会对周围环境和社区产生负面影响，因为尾矿容易受到风蚀。在这项研究中,卤化物(氯化钠[NaCl]，氯化钙[CaCl2]，和氯化镁六水合物[MgCl2·6H2O]），和聚合物材料(聚丙烯酰胺[PAM]，聚乙烯醇[PVA]，和木质素磺酸钙[LS]）进行了研究，以稳定尾矿以控制粉尘。直立乳香（Astragalusadsurgens），黑麦草（黑麦草），和百慕大草（Cynodondactylon）种植在尾矿中，并喷洒化学抑尘剂。还研究了植物的生长状况及其对尾矿力学性质的影响。结果表明,卤化物和聚合物稳定了尾矿的失重,并随着溶液浓度和喷雾量的增加而降低。卤化物和聚合物稳定的尾矿的抗渗透性随溶液浓度和喷雾量的增加而增加。在测试的卤化物和聚合物中，CaCl2和PAM的使用导致了对尾矿粉尘的最佳控制，分别。CaCl2溶液降低了植物的适应性，因此使草籽难以正常发芽。PAM溶液有利于草本植物的发展。在这三种草本植物中，黑麦草的发育程度最好，更适合在尾矿中生长。喷施PAM的尾矿中种植的黑麦草植物生长最好，形成的根-土复合体增加了尾矿的抗剪强度。
