Type of major water hazards and study of countermeasures in Shennan Mining Area          下载免费PDF全文

WANG Hong-ke  GUO Jiao  SHI Ying-chun 《地下水科学与工程》2015,3(1):70-76

By analysing the hydrogeological conditions of this region and the coal mines hereof, together with the water hazards troubled Shennan mine area in recent years, this paper summarized six types of mine water hazards. As per the basic characteristics, geological distribution, threat degree and difficulty of prevention of various water hazards, along with the practice of water prevention in the mining area, this article proposed effective technical measures for the prevention and control of different water hazards and laid a solid foundation for the safe production in the mining area.  相似文献   

市场转型期中国大城市低收入社区住房分异研究   总被引：5，自引：4，他引：1  

柳林  杨刚斌  何深静 《地理科学》2014,34(8):897-906

基于2007年在广州、武汉、西安3个大城市的低收入社区开展的大型入户调查数据,在社区尺度探究了中国大城市低收入社区中不同社会经济群体间的住房分异情况,并分析了在社会经济转型背景下的制度因素(如户口、邻里类型、雇主类型等)和市场因素（如社会群体、年龄、受教育程度、家庭收入、职业等）对住房产权和居住条件的影响。通过计算泰尔指数发现,大城市低收入社区中不同群体间和群体内的住房分异情况都较显著,但群体内部的差异较群体间的差异更为明显。对住房条件的多元回归分析结果表明,低收入社区不同社会群体的住房条件在不同程度上受到制度因素和市场因素的影响。制度因素对住房面积等难以在短时间内改变的住房条件的作用较市场因素更显著,而市场因素对于住房设施等较易改变的住房条件的影响要比制度因素明显。  相似文献   

Contamination of arctic Fjord sediments by Pb-Zn mining at Maarmorilik in central West Greenland     

K. Perner  Th. Leipe  A. Kuijpers  T.J. Andersen 《Marine pollution bulletin》2010,60(7):1065-1073

This study focuses on heavy metal contamination of arctic sediments from a small Fjord system adjacent to the Pb-Zn “Black Angel” mine (West Greenland) to investigate the temporal and spatial development of contamination and to provide baseline levels before the mines re-opening in January 2009. For this purpose we collected multi-cores along a transect from Affarlikassaa Fjord, which received high amounts of tailings from 1973 to 1990, to the mouth of Qaumarujuk Fjord. Along with radiochemical dating by ²¹⁰Pb and ¹³⁷Cs, geochemical analyses of heavy metals (e.g. As, Cd, Hg, Pb, and Zn) were carried out. Maximum contents were found at 12 cm depth in Affarlikassaa. After 17 years the mine last closed, specific local hydrographic conditions continue to disperse heavy metal enriched material derived from the Affarlikassaa into Qaumarujuk. Total Hg profiles from multi-cores along the transect clearly illustrate this transport and spatial distribution pattern of the contaminated material.  相似文献   

Lake morphometry and wind exposure may shape the plankton community structure in acidic mining lakes     

Guntram Weithoff  Michael Moser  Ursula Gaedke 《Limnologica》2010,40(2):161-166

Acidic mining lakes (pH <3) are specific habitats exhibiting particular chemical and biological characteristics. The species richness is low and mixotrophy and omnivory are common features of the plankton food web in such lakes. The plankton community structure of mining lakes of different morphometry and mixing type but similar chemical characteristics (Lake 130, Germany and Lake Langau, Austria) was investigated. The focus was laid on the species composition, the trophic relationship between the phago-mixotrophic flagellate Ochromonas sp. and bacteria and the formation of a deep chlorophyll maximum along a vertical pH-gradient. The shallow wind-exposed Lake 130 exhibited a higher species richness than Lake Langau. This increase in species richness was made up mainly by mero-planktic species, suggesting a strong benthic/littoral - pelagic coupling. Based on the field data from both lakes, a nonlinear, negative relation between bacteria and Ochromonas biomass was found, suggesting that at an Ochromonas biomass below 50 μg C L⁻¹, the grazing pressure on bacteria is low and with increasing Ochromonas biomass bacteria decline. Furthermore, in Lake Langau, a prominent deep chlorophyll maximum was found with chlorophyll concentrations ca. 50 times higher than in the epilimnion which was build up by the euglenophyte Lepocinclis sp. We conclude that lake morphometry, and specific abiotic characteristics such as mixing behaviour influence the community structure in these mining lakes.  相似文献   

翡翠文化与翡翠市场探释     

徐孟军  李济 《山东国土资源》2010,26(3):60-63

中国人几千年来对翡翠有着特殊爱好,其融入了自古以来的玉石文化,它对中华民族的精神、意志、道德、哲理产生着巨大的影响。翡翠的探释是一门高雅的艺术,不但要从文化的层面来认识翡翠,而且还要多了解一些翡翠的专业知识和翡翠市场的发展现状。本文详细地介绍了目前国内几大翡翠市场和各市场的特点以及中国翡翠市场的发展史。  相似文献   

济南市长清区矿业权出让管理规范化探索     

孙家伟  魏文林 《山东国土资源》2010,26(6):52-54

济南市长清区具有丰富的矿产资源,矿产资源的开发为经济建设提供了充足的建筑材料。但是一直以来无序、无规划的开采,在一定程度上也破坏了自然环境。长清设区后,长清区不断推进矿产资源有偿使用制度改革,逐步建立完善矿业权有偿出让相关制度,对出让的矿业权一律以市场竞争的方式有偿出让。进一步规范了全区采矿权出让行为,巩固了整顿和规范矿产资源开发秩序工作成果。  相似文献   

国际矿业税制最新改革焦点及其启示     

李晓妹 《山东国土资源》2010,26(12)

矿业税费制度多年来一直是我国改革的难点和热点。该文分析了最近几年来世界主要矿业国家和地区矿业税制改革的最新动态和发展趋势,总结了国际矿业税制最新改革对我国的启示,提出了构建我国有效矿业税制应该建立矿业税费评价制度,确立评价指标和方法,建立良好的矿业税基本制度。  相似文献   

烟台市房地产市场土地调控问题探讨     

范喜秋 《山东国土资源》2010,26(12)

国家出台的房地产紧缩政策,有效遏制了一线城市房地产市场的过热势头,但同时也制约了诸如烟台市这样的三线城市的市场交易,尤其是一些合理的改善型需求也得到遏制,导致房地产交易明显下降。该文通过对近几年烟台市房地产市场的的量化对比和综合分析,提出加强房地产用地调控力度的重要性以及对策措施,对新形势下如何协调国家房地产紧缩政策与房地产市场的平稳健康发展具有良好的借鉴价值。  相似文献   

基于SSM方法的云南省海外旅游客源市场分析     

赵云  罗明义 《云南地理环境研究》2010,22(5):34-39

通过运用SSM的基本方法并将模型加以改进,对云南省主要的17个海外旅游客源市场进行了分析。结果发现,相对于全国大背景而言,云南省对上述客源国的吸引力较大,对其旅游市场的开拓较为成功,海外旅游业的发展具备一定的优势,尤其是对港澳地区、台湾、美国、韩国、泰国和法国优势明显。但同时也发现,传统的两个重要客源市场：日本和新加坡,却呈现弱化的趋势,应引起云南省开拓海外市场营销的关注。针对计算结果,分析产生的原因,并提出云南省海外旅游市场的营销步骤等启示与建议。  相似文献   

基于市场的西安城市家庭旅游决策研究     

严艳  周文  张佑印 《地域研究与开发》2010,29(4)

家庭是社会群体中最基本的单元,家庭旅游市场已发展成为世界旅游业的一个重要细分市场。在详细的市场调查基础上,以西安市为例,分析了单身家庭、夫妻二人家庭、核心家庭和延续式家庭4种不同家庭结构旅游者的出游方式、出游动机、出游时间和频率等出游总体特征以及出游信息获取偏好、停留天数与旅游消费偏好、旅游住宿偏好、旅游目的地类型偏好、旅游活动项目偏好等出游认知偏好,从中发现不同类型家庭旅游者的决策行为特征及规律,为家庭旅游市场开拓和营销实践提供依据。  相似文献