简易巷道修补填充机在巷道特种地质条件下的设计与应用

针对特种地质情况下,巷道顶板质量差、顶板承受压力大、局部巷道变形严重、顶板和两帮喷浆层经常出现开裂、脱落等问题,设计了1台简易小型巷道修补填充机,并成功应用于巷道修补中。实践证明,这种简易小型巷道修补填充机能够有效地适应在特种地质条件下的巷道修补,且无需额外铺设电缆,操作简单,节能效果显著,使用、维护方便。

地质特种水泥对模拟含铀废液的静态吸附动力学研究

针对含铀废液这类具有放射性的特殊废液,本实验选用养护28 d、粒径为200-220μm的水泥颗粒作为吸附剂,通过改变吸附时间t以及pH值,获得地质特种水泥对含铀溶液的静态吸附规律。实验结果表明,地质特种水泥对不同浓度含铀溶液(20 mg·L^(-1)、30 mg·L^(-1)、40 mg·L^(-1))的静态吸附均在第1.5 d基本达到吸附平衡,最大吸附量(q_e)分别达到40.257 mg·g^(-1)、60.423 mg·g^(-1)、80.386 mg·g^(-1),最终静态平衡吸附率高达99.95%;保持铀溶液浓度一定(30 mg·L^(-1)),改变吸附体系的pH值(5、7、9),地质特种水泥对U(Ⅵ)的吸附率均可达到99.50%,无显著差异。以上结果表明,在本实验设定的环境条件下,地质特种水泥对U(Ⅵ)有极强的吸附能力,且其吸附效果基本不受含铀溶液浓度和pH值的影响。同时,静态吸附动力学模型研究表明,伪二级动力学模型能很好地描述地质特种水泥静态吸附铀的全过程(t=0-41 d),其相关系数R^2高达99.99%,表明地质特种水泥对U(Ⅵ)的吸附机理为:吸附速率按照与吸附驱动力(q_e-q_t)的平方呈正比关系进行演变。

地质特种水泥对模拟含锶废液的静态吸附性能研究

选用地质特种水泥原料粉末作为吸附剂,研究了吸附剂对含锶溶液的静态吸附规律。结果表明,静态吸附平衡的最大吸附率为47.91%;最佳吸附时间为1.6 d;在碱性条件下地质特种水泥吸附效果最佳;吸附速率按照与吸附驱动力的平方呈正比关系进行演变;地质特种水泥对锶离子的吸附为单分子层吸附。

Phylogeography and Characteristics of Phosphorus Efficiency of Secondary Core Collection for Rice Landraces in Yunnan Province

[Objective] The paper was to explore the causes of phosphorus(P)efficiency of rice in Yunnan Province,and to provide strategy for ecological and environmental protection.[Method]Using 703 accessions of secondary core collections from 16 prefectures of five regions in Yunnan Province,two treatments of low available P(6.26mg/kg)versus normal P(available P 40mg/kg),and invalid P(available P 0.02 mg/kg)versus normal P(available P 70 mg/kg)were set,and zonal characteristics of phosphorus efficiency and the activation characteristics of invalid P of rice landraces were investigated.[Result] Phosphorus efficiency and the activation characteristics of invalid P in soils from rice landraces of Yunnan Province had the similar identification indexes,viz.the relative indexes of four traits(tillering ability or effective panicle,root weight,biomass,and straw weight)could be the screening indexes of gene type of secondary core collection with phosphorus efficiency,which also reflected the zonal characteristics of phosphorus efficiency and the activation characteristics of invalid P in soils of 16 prefectures among five regions.On the contrary,the relative panicle length,node length under panicle,leaf length,leaf width and plant height could only be the assistant indexes of identification for phosphorus efficiency.There were similar zonal characteristics between phosphorus efficiency and the activation characteristics of invalid P in soils of rice landraces in Yunnan Province.[Conclusion] The study had great importance to the conservation and utilization of biological diversity,which would make contribution to second green revolution of "less input,multiple output,promote health,and protect the environment".

Research and Evaluationon Ecotourism Resources of Jilong Valleyin Everest National Nature Reserve

Jilong is a place behind The Himalayas,which is almost isolated from the world.There is typical vertical ecosystem thanks to its special geological environment. So it is honored as “the most abundant species gene warehouse in the Plateau Area”and “the most beautiful valley in the world”.To exploit this valleyis necessary along with the construction of Jilong Porton the border of Sino-Nepal. Based on the research on the spot,the ecological resources there are evaluated and an idea that regards hiking tourism asmain form and ecotourismas the theme is put forward in this paper,which explores a way to develop the valley on the basis of sustainability.