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Stability Assessment of Open Stope under overlaying Mined-Out Regions at Modi Taung Gold Mine, Myanmar

International Journal of Geosciences 2018年第9期9卷 547-571页

作者： Naung Naung Takashi Sasaoka Hideki Shimada Akihiro Hamanaka Sugeng Wahyudi Mao Pisith Department of Earth Resources Engineering Kyushu University Fukuoka Japan No. 2 Mining Enterprise Ministry of Natural Resources and Environmental Conservation Nay Pyi Taw Myanmar

Stability assessment is one of the most important issues in mining ground control. Mine development and/or production instability can cause production delay, loss of reserves, as well as injury to miners. Within the scope of this study, a series of open stope’s instability under the influence of overlaying mined-out regions were carried out with different mining scenarios at Modi Taung gold mine which is operated by National Prosperity Gold Production Group Limited (NPGPGL) in Myanmar. NPGPGL has been developing stopes up to 150 m from the surface at Shwesin vein system, and the mining activities are going to continue to deeper levels to fulfill the ore mineral supply. Creating a new stope opening under overlaying mined-out regions is not easy considering the instability of mined-out regions can affect the stope. The instability of new stope opening is not only due to its own induced stress but also the strong influence by the mined-out regions situated on upper part of the stope. Therefore, the understandings of ground behaviors and failure mechanisms of new stope opening due to the influence of overlaying mined-out regions are paramount to be studied. This paper describes in detail the strength factor and failure zones under the overlaying mined-out regions with different mine conditions by using numerical simulations, 3D finite difference software (FLAC 3D).

关键词： Failure Zones FLAC 3D Open Stope overlaying Mined-Out Regions Stability Assessment

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Research on Application of Landscape Pattern in Regional Planning

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Journal of Landscape Research 2012年第7期4卷 18-20,23页

作者： LIU Qian1,WANG Wenyi2,LIN Sheng3,ZENG Weihua2(1.Environmental Protection Bureau of Chaoyang District Beijing Municipality,Beijing 100026,China 2.School of Environment,Beijing Normal University,Beijing 100875,China 3.Hainan Research Academy of Environmental Sciences,Haikou,Hainan 570206,China)

Landscape ecology is a new science and there are few cases about applying landscape pattern analysis in optimizing regional *** taking the planning of the special planning area for Boao Forum for Asia as the study object,several important landscape indexes have been selected for static analysis of landscape structural feature and landscape structural *** using ArcGIS,landscape structural stability map has been overlaid with land use planning map,and then optimization suggestions have been proposed for unreasonable *** type and landscape pattern diversity have been selected for dynamic analysis and then suggestions for landscape security pattern been put *** case studies,it has provided a reference for landscape pattern analysis as a means to optimize regional planning.

关键词： Landscape pattern Analysis Regional planning Spatial overlaying Landscape security pattern

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