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针对新疆塔城地区某煤矿三维地震勘探区戈壁地表复杂、目的层埋藏浅等地质条件,阐述了在野外数据采集、室内资料处理及资料解释的不同阶段所采用的相应技术措施和取得的地质效果。勘探结果表明:在目的层较浅的复杂地表区,采取小CDP网格、高覆盖次数、现场监控、精细处理、人机交互辅助解释和多元地质信息分析等技术手段,可以获得勘探精度较高的地震地质成果。 相似文献
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汶川地震断裂带科学钻探项目WFSD-4S孔是为了进一步了解汶川地震主滑移带情况,取得更为全面完整的地质资料,于南坝地区四号孔附近靠近地表破裂带的位置所补充施工的穿过汶川地震主滑移带的浅孔。主要介绍了汶川地震断裂带科学钻探项目WFSD-4S孔针对钻孔地质条件复杂、孔内岩心采取率低等难题所采用的关键工艺和技术措施,并对其应用成果进行了分析和总结,通过从地层情况、施工过程、取心钻具、冲洗液技术以及事故处理等几个方面的详细论述,为以后对复杂地层选用合理的取心技术提供重要参考依据。 相似文献
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在放射性测量方法出现的早期,用绝对年令来表达地质年令被认为是一个重大的进步,因为它确切无疑地说明了地质历史的长度。随着测试技术,特别是质谱仪器的发展,实测年令的可靠性也随之提高。年令的真实程度主要取决于所采用的衰变常数。近二十年来,地质年代学家把注意力集中到改进测定同位素的分析方法和更精确地确定地质年代学上所采用的放射性同位素的衰变常数上。近年来,地质年代学中三种测定放射性年令的主要方法多采用表1上所列举的一些 相似文献
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瑞利波探测技术用于矿井地质超前探测 总被引：3，自引：1，他引：2
鹤岗矿区煤系曾遭受多次构造运动的改造,地质情况复杂。为满足采区和生产布置的需要,采用瑞利波探测技术对地质情况进行精细探查和预报。在井下用瑞利波方法探测下部煤层、超前探测煤巷、岩巷前方的构造,取得了满意的效果。该技术方法提高了地质预报的准确性,在煤矿有良好的应用前景。 相似文献
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《中国地质调查》编辑部 《中国地质调查》2019,(2):112-112
《中国地质调查》(双月刊,CN 10-1260/P,ISSN 2095- 8706)是由中国地质调查局主管、中国地质图书馆主办的综合性学术期刊。该刊以“宣传地质调查重要理论和技术研究成果,介绍地质调查领域新发现和地质调查工作部署,探讨地质学理论认识和技术方法创新,搭建地学领域信息交流平台”为办刊宗旨,以突出反映中国地质调查6大任务- 9大计划-50项工程-300多个项目所取得的调查研究成果为目标。设有:能源与矿产资源、基础地质、海洋地质、灾害与环境以及科技与综合等栏目。 相似文献
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直流电法在探测老窑采空区的应用 总被引：1，自引：1，他引：1
在各种工程地质、环境地质中、对地下采空区的探测是地球物理勘探的一项重要内容。文章从物性参数研究、技术方法择方面入手，探讨了直流电法探测老窑采空区的可行性，并以实例介绍了解决该问题所取得的经验。 相似文献
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针对北京人民医院附属楼基坑周边环境、地质条件的复杂性 ,采用锚喷技术对基坑边坡进行支护 ,取得了成功。介绍了锚喷支护技术的设计及施工要点 ,并提出了施工的技术保证措施 相似文献
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The organisational context of retail locational planning 总被引：1，自引：0，他引：1
Retailers have a large number of techniques at their disposal to assist them in their locational planning, but the use made
of them is varied, regardless of their intrinsic merits. The reasons for this lie very much in the organisational context
in which the techniques are applied. This paper discusses the nature of locational planning and decision making, and puts
forward a framework which links locational planning and the organisational settings in which it takes place. The preliminary
results of a survey of the use of techniques by U.K. retailers are presented, which show that while most companies use more
than ‘Rules of Thumb’, it is the simplest techniques which are the most widely used. The application of the more advanced
knowledge based methods is still relatively uncommon. The explanation for the variations lies in the attributes of the techniques
themselves, the types of locational planning undertaken, and the structural and cultural characteristics of the companies.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Parijat Roy Vysetti Balaram Anil Kumar Manavalan Satyanarayanan Thota Gnaneshwar Rao 《Geostandards and Geoanalytical Research》2007,31(3):261-273
Data on thirty-four minor and trace elements including all rare earth elements (REE) are reported for two kimberlitic international reference materials (SARM-39, MINTEK, RSA and MY-4, IGEM, Russia) by inductively coupled plasma-mass spectrometry (ICP-MS), some of them for the first time. Four digestion techniques (open acid, closed vessel acid, microwave and lithium metaborate fusion digestion) were used for the decomposition of samples for analysis by ICP-MS. Three other reference materials (USGS BHVO-1, CRPG BR-1 and ANRT UB-N) were analysed simultaneously using the same analytical methodology to assess the precision and accuracy of the determinations. The data obtained in this study compare well with working values wherever such values are available for comparison. Though open acid digestion was found to be very rapid, effective and convenient for the determination of several trace elements in kimberlitic samples, recoveries for heavy rare earth elements (HREE) were lower than the respective recoveries obtained by the other decomposition techniques used. The precision obtained was better than ± 6% RSD in the majority of cases with comparable accuracy. Chondrite-normalised plots of each RM for all the digestion techniques were smooth. The new data reported on the two kimberlitic reference materials make these samples useful for future geochemical studies of kimberlitic rocks. 相似文献
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In this paper soft computing techniques, self-organizing maps and fuzzy clustering techniques have been proposed to isolate different layers in stratified soil based on available cone penetration test results. The results have been compared with that obtained from cone classification chart, hierarchical and K-mean clustering techniques. It was observed that variation in result with self-organizing map (SOM) and fuzzy clustering for isolating soil layers is marginal. These techniques are found to be efficient compared to hierarchical clustering technique. The results of K-mean clustering show that the identified soil strata are similar to that obtained from cone classification chart, SOM and fuzzy clustering. 相似文献
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Mahmoud Mehramuz Hossein Zomorrodian Khadijeh Ahmadi Majid Mahood 《Arabian Journal of Geosciences》2013,6(10):3853-3864
The separation of residual gravity anomaly from regional gravity has considerably been studied for many years in gravity explorations. In addition, it is considered as a critical step in gravity data inversion. Some techniques have been developed for regional–residual anomaly separation both in space and frequency domains. One of these techniques for computing the regional anomaly is nonlinear filtering. In this paper, some techniques such as low-pass filtering, Butterworth, upward continuation, and nonlinear filtering are used to on synthetic gravity data in present of random noise and noise free for the purpose of residual–regional anomaly separation. The obtained results of techniques are compared with each other. The results have shown that separation methods are so efficient where synthetic models are located in shallow depth. Moreover, it is found that in comparison with other separation techniques, nonlinear filtering is more efficient in residual–regional anomaly separation and upward continuation technique is more efficient than Butterworth filter and low-pass filter. In addition, all of the obtained results have shown that Butterworth and low-pass filters are the same. 相似文献
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在新疆达尔布特构造带附近展开多元信息综合找矿时．以遥感方法为先导,采用ETM数据多光谱假彩色合成、主成分分析、HSI编码、边缘增强以及Crosta法蚀变矿物填图等技术,结合化探异常及地质综合分析,圈定找矿靶区;经过部分地表检查验证,新发现矿化点8处,主要位于达尔布特断裂带的下盘,矿化多与花岗闪长岩小岩体有关,突破了前人认为成矿主要位于该断裂带上盘的认识,为区内找矿提供了重要线索,并为研究成矿规律、完善成矿理论提供了有益证据。 相似文献
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V.V. Plotkin 《Russian Geology and Geophysics》2012,53(1):108-115
The study is devoted to the possibilities of MTS in the case of arbitrary medium and electromagnetic-field inhomogeneity. It has been shown that the local tensor impedance and admittance ratios between the field components are usually differential. Useful information about the study region, with complex behavior of sounding curves, can be obtained by unconventional processing techniques, with the help of nonlocal medium response functions (component matching). Experiments can be considerably more cost-effective if we divide the study area into several small zones of synchronous observations and perform independent experiments in each of them at different time. 相似文献
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Evaluation and comparison of GIS based landslide susceptibility mapping procedures in Kulekhani watershed, Nepal 总被引：2，自引：0，他引：2
Prabin Kayastha Megh Raj Dhital Florimond De Smedt 《Journal of the Geological Society of India》2013,81(2):219-231
The goal of this paper is to evaluate and compare the consistency of GIS-based heuristic and bivariate landslide susceptibility mapping techniques in the Himalayan region, taking the Kulekhani watershed of central Nepal as an example. For this purpose, a heuristic and two statistical bivariate landslide susceptibility mapping methods are applied, and three separate landslide susceptibility zonation maps are produced. The maps are compared using three approaches: landslide density analysis, success rate analysis, and agreed area analysis. A comparison of the values obtained from landslide density analysis and the curves of success rate analysis indicate that the two bivariate methods produce almost identical results, whereas the map produced with the heuristic method differs significantly from the others. On the other hand, the agreed area analysis highlights significant spatial differences in the maps obtained from the three methods. Although the three approaches evaluate the consistency of susceptibility maps, only the agreed area analysis is capable of spatially comparing them. Hence, this approach proves to be more suitable for spatially and quantitatively evaluating the consistency of various landslide susceptibility zonation maps. 相似文献
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第二代航空物探在我部已经展开并取得了初步效果.本文首先介绍了近年来航空物探工作在方法技术方面的进展,着重叙述第二代航空物探的工作情况及已经取得的成果,尤其是所获得的初步的地质找矿效果.提出了今后开展工作的方向及进一步要抓好的工作.分析了在进一步深入工作中可能得到的效益. 相似文献
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