甘肃小柳沟矿区水工环地质评价及意义

小柳沟钨钼多金属矿区位于北祁连多金属成矿带的西段,矿区褶皱断裂发育,岩浆活动强烈,地层岩石变形强烈,变质深。对矿区水工环评价至关重要,对矿床的开采具有极其重要的经济意义。     

让压型锚索箱梁支护系统组合构件耦合性能分析及应用

对锚索梁支护及组合构件耦合支护研究现状进行了总结分析,指出锚索梁支护系统组合构件耦合支护研究的必要性和意义。以“先控后让再抗”支护理念为指导,研发出高强让压型锚索箱梁支护系统。通过层次分析法得到支护系统各构件权重值,提出了支护系统构件整体性能利用率、耦合效率和围岩控制效果3个指标,进行的13种数值试验对比方案结果表明：Ⅱ12c+? 22锚索、Ⅱ12b+? 22锚索和Ⅱ12a+? 17.8锚索方案对应的支护系统均具有较高的耦合效率;锚索型号对支护系统耦合效率具有较为显著的影响;增大预紧力有助于进一步提高构件整体利用率、耦合效率,改善围岩控制效果。设计制作了测力箱梁,选择Ⅱ12b+? 22锚索方案对应的锚索梁支护系统进行了现场试验,测站监测结果显示,支护系统在掘巷期间的整体性能利用率为54.51%,构件耦合效率达到75.61%,系统各构件达到了同步承载的效果,巷道顶板沉降量和两帮移近量分别为148 mm和180 mm,较好地控制了巷道围岩变形。     

西藏纳木错—嘉黎断裂带铜多金属矿化特征及找矿模型

西藏纳木错—嘉黎断裂带是狮泉河-申扎-嘉黎结合带的重要组成部分,该断裂带为区内的控岩控界断裂,具有规模大、切割深的特点,是西藏念青唐古拉山地区铜多金属成矿的重要导矿构造.断裂带西起纳木错,东至嘉黎县城以东,全长320km以上,沿该带及两侧分布有大量地化异常及大、中型矿床(点).通过对区内地、物、化、遥资料的综合研究,分...     

广开言路 开门纳谏——三门峡市局扎实开展党的群众路线教育实践活动

正在党的群众路线教育实践活动中,三门峡市国土资源局把做好听取意见工作作为开展群众路线教育实践活动的基础环节,坚持开门搞活动,抛开面子,放下架子,敞开大门听意见,紧扣作风建设这一主题,围绕反对"四风",问政于民、问需于民、问计于民。突出听取意见的重点。该局紧扣作风建设,着重听取群众对领导机关、领导班子和领导干部在作风方面     

北斗如何“环洞庭湖”

正"环洞庭湖岳阳北斗城市应用示范工程"建设正如火如荼地进行,项目一期工程计划投资6000万元,重点在洞庭湖水利水务管理、运输车辆管理、公务车辆管理等领域开展北斗导航示范应用。对此,解放军总装部组织包括中科院院士、运载火箭与卫星技术专家孙家栋等专家学者专题研讨如何进一步做好"环洞庭湖北斗城市应用示范工程",以加快启动二期工程的相关工作。处理GPS和北斗的关系、鼓励双模兼容孙家栋(中科院院士、运载火箭与卫星技术专家)目前,北斗卫星导航系统已能够覆盖亚太地区,实现区域导航。其无源     

A 200-year record of polycyclic aromatic hydrocarbons contamination in an ombrotrophic peatland in Great Hinggan Mountain,northeast China

Peat bogs are regarded as one of the faithful archives of atmospheric polycyclic aromatic hydrocarbons(PAHs) deposition, and a large number of studies on PAHs accumulation in peatlands have been reported in Europe and North America. Comparatively little information is available on peat chronological records of atmospheric PAHs flux in China. We investigated the concentrations and historical accumulation rates of PAHs(AR PAHs) through geochemical analysis of three 210Pb-dated ombrotrophic peat cores from Great Hinggan Mountain, northeast China. Eight USEPA priority PAHs were detected and they are naphthalene(Nap), acenaphthylene(Acl), acenaphthene(Ace), fluorence(Flu), phenanthrene(Phe), anthracene(Ant), fluoranthene(Fla) and pyrene(Pyr), respectively. The average total eight PAHs(tPAHs) concentrations are 135.98- 262.43 μg kg-1 and the average AR tPAHs over the last two centuries are 96.45- 135.98 μg m-2 yr-1. The Ace, Acl and Phe account for 30.93- 54.04%, 25.29- 35.81%, and 9.14- 19.84% of the tPAHs, respectively, and have significant positive correlations with the tPAH. As a result, they are regarded as the iconic compounds of PAHs pollution in this area. A ca.200-yr atmospheric PAHs contamination history was reconstructed from the temporal sequences of bothconcentration and AR tPAHs, suggesting the variation of local environmental pollution. The main sources of the PAHs are identified by two isomer ratios as petrogenic origin including oil extraction and refining process as well as their combustions for industrial development. In addition, the contribution of coal combustion for industrial activities and resident heating could not be ignored. But prior to 1860, the undeveloped industry and most of agricultural activities might mainly account for the low level of PAHs, although it could infer a long-range input of atmospheric PAHs from other industrial areas. Therefore, there is a global implication to study longterm PAHs pollution records and all the results will provide practical significance in formulating policies to achieve sustainable and healthy development.     

云南锡矿遥感地质找矿模型

从云南锡矿床成矿地质环境、时空分布及矿床特征出发,将花岗岩的等级体制概念、控岩控矿构造的成矿构造体系概念和矿床展布的矿化单元等级体制概念引用到锡矿遥感地质模型研究中。根据丰富的锡矿地质科研资料与遥感图像的对应分析,发掘锡矿遥感影像-地质特征,进而拟建锡矿遥感地质找矿模型,即由赋锡总体特征模型、矿床定位最佳模型和影像-地质鉴别程序模型三部分组成的云南锡矿遥感地质找矿系列模型。