A Cost Effective Method to Enhance Dredge Mine Reconciliation in Heavy Minerals Mining Industry     

G. V. I. Samaradivakara  M. Kizil  P. Knights 《Marine Georesources & Geotechnology》2013,31(4):273-280

Heavy mineral deposits of placer origin are mostly found as beach or dune deposits. Suction cutter or bucket-wheel dredgers are used to exploit such deposits when water is present for the maintenance of artificial channels and dredge ponds. Production reconciliation of dredge mining is a complex process because slumping of material causes mixing of material to take place amongst resource blocks during mining operations. This paper reviews the applicability of sonar technology for the determination of material losses taking place in the dredge ponds, and also reviews the applicability of radio frequency identification (RFID) tags in conjunction with sonar technology as a cost effective method to enhance dredge mine production reconciliation in the heavy minerals mining industry.  相似文献   

障碍物探测方法探讨     

罗深荣  余海洪  张启国  巫贤虎 《海洋测绘》2013,33(1):38-42

介绍了侧扫声纳、多波束测深系统、磁力仪的工作原理,提出了障碍物探测的相关技术要求。实例分析了综合利用侧扫声纳、多波束进行沉船探测的方法,结合侧扫声图和多波束水深探明障碍物的精确位置,测得最浅点水深,全面获得障碍物信息,大大提高了探测质量。对铁磁性小目标探测能力进行评估,并用实例加以分析和佐证。  相似文献   

C3D及其与传统侧扫声纳的比较     

张济博  潘国富  苟诤慷  丁维凤  蒋维杰 《海洋测绘》2013,33(5):75-77

C3D是Benthos公司近年来推出的基于CAATI技术的一种新型测深侧扫声纳系统。从工作原理、技术参数、数据采集与后处理平台以及实测数据等方面将C3D和传统侧扫声纳进行了对比。对比表明两者的工作原理不同,C3D的采集数据密度更高,对采集和处理软件要求比传统声纳高,最后对两者采集的数据进行了分析。通过对比,为侧扫声纳系统的选用和引进提供了依据。  相似文献   

C3D测深侧扫声纳探测系统综述   总被引：2，自引：0，他引：2  

沈蔚  程国标  龚良平  李勇攀  韩军  章守宇  张进 《海洋测绘》2013,(4):79-82

对C3D测深侧扫声纳系统的构成、工作原理、性能、优点、应用等进行了介绍,对基于C3D构建水下探测系统和工程实践进行了研究,对C3D数据处理工具和方法进行了探讨,对C3D的优势、不足和应用前景进行了总结。实测表明,C3D是一款性能优越能够满足多种水下工程需要的声纳探测系统。  相似文献   

Post-glacial sediment dynamics in the Irish Sea and sediment wave morphology: Data–model comparisons     

Katrien J.J. Van Landeghem  Katsuto Uehara  Andrew J. Wheeler  Neil C. Mitchell  James D. Scourse   《Continental Shelf Research》2009,29(14):1723-1736

The irregular seafloor of the narrow Irish Sea on the NW European Shelf has been documented over several decades. From recently collected swath bathymetry data, very large trochoidal, nearly symmetrical sediment waves are observed in many parts of the Irish Sea and appear similar to those described from other continental shelf seas in North America that were covered by glacigenic sediments during the Last Glacial Maximum. Swath multibeam and single beam bathymetry data, backscatter intensity, shallow seismic imagery, video footage and sediment cores from the Irish Sea high sediment waves have been integrated to identify their genesis with reference to present and past hydrodynamic variability. From cross-sectional profiles over asymmetrical sediment waves in the Irish Sea the direction of asymmetry is used to map residual bed stress directions and associated bedload transport paths. Irish Sea peak bed stress vectors were generated using a two-dimensional palaeo-tidal model for the NW European shelf seas and compare well with the observations. Tidally induced bed stresses are modelled to have increased between 7–10 ka BP, to be nearly symmetrical in magnitude and to have reversed in dominant direction on a millennial scale. These environmental conditions during the post-glacial marine transgression are suggested here to help comprehend the construction of the very large sediment waves, with local variations due to differences in sediment grain size, sediment supply, water depth and intensified currents due to seafloor slopes. Model parameterisation using an open ocean boundary with time-dependent tidal changes and the implementation of high-resolution bathymetric information will improve future models of small-scale bed shear stress patterns and improve the predictive value of such modelling efforts.  相似文献   

Development of an Uncertainty Propagation Equation for Scalar Fields     

Brian Calder  Paul Elmore 《Marine Geodesy》2017,40(5):341-360

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Seafloor sediment classification based on multibeam sonar data   总被引：1，自引：1，他引：0  

ZHOUXinghua CHENYongqi 《地球空间信息科学学报》2004,7(4):290-296

The multibeam sonars can provide hydrographic quality depth data as well as hold the potential to provide calibrated measurements of the seafloor acoustic backscattering strength. There has been much interest in utilizing backscatters and images from multibeam sonar for seabed type identification and most results are obtained. This paper has presented a focused review of several main methods and recent developments of seafloor classification utilizing multibeam sonar data or/and images. These are including the power spectral analysis methods, the texture analysis, traditional Bayesian classification theory and the most active neural network approaches.  相似文献   

利用MVDR算法削弱多波束测深声纳的隧道效应   总被引：1，自引：0，他引：1  

魏玉阔  陈宝伟  李海森 《海洋测绘》2011,31(1):28-31

分析了海底多波束测深声纳中存在的隧道效应及其产生机理,指出旁瓣干扰是引起隧道效应的重要因素,隧道效应的出现导致多波束测深声纳把相对平坦的海底误测成凹面向上的水平半圆柱面海底地形。研究了基于GSC结构的自适应波束形成算法,推导提出了MVDR算法的连续自适应实现方案,并利用该算法对多波束测深声纳湖试数据中存在的隧道效应进行处理,结果表明该算法能够有效削弱多波束测深数据边缘波束中存在的旁瓣干扰。  相似文献   

海底三维可视化技术及应用   总被引：2，自引：1，他引：1  

李军  滕惠忠 《海洋测绘》2004,24(4):44-47

海底地形地貌能表现海洋世界重要的空间信息,也是常规光学和电磁手段难以探测的水下区域。应用侧扫声纳技术可以反演海底地貌,同时多波束测深技术得到的水深数据重建数字水深模型,二者结合创建三维海底空间景观。利用海洋探测技术和三维可视化技术进行海底地形地貌三维仿真和分析,并对其应用进行探讨。  相似文献   

侧扫声纳系统及其在海洋环境监测和保护中的应用   总被引：3，自引：0，他引：3  

鱼京善  成二丽 《海洋测绘》2004,24(2):63-66

总结了侧扫声纳系统在海洋环境监测和保护中的应用,介绍了侧扫声纳基本工作原理及其发展情况,并且对其以后的发展进行了简单探讨。  相似文献