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Volume 50 (2009 - 201･･･
- Issue 6 Pages 319-
- Issue 5 Pages 262-
- Issue 4 Pages 202-
- Issue 3 Pages 126-
- Issue 2 Pages 70-
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Volume 50, Issue 6
Special Issue
Displaying 1-7 of 7 articles from this issue
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General Article
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—Some Experiences in Old Mining Districts—Tetsuro ESAKI, Ryugo MAKINO, Ibrahim DJAMALUDDIN, Hiro IKEMI2010 Volume 50 Issue 6 Pages 319-328
Published: 2010
Released on J-STAGE: March 31, 2013
JOURNAL FREE ACCESSOne of the goals of the science and technology policy of Japan is to ensure a better quality of the life of its citizens by implementing safe measures. In this respect the management of the problem of sinkhole and subsidence, which is related to mining, is one example. Subsidence and sinkhole have hazardous impacts for human settlement and hence integrated technology has to be employed to manage them.
Underground mining has been carried out for a long time in Japan. Consequently subsidence and sinkhole are generated in large part of old mining district. It is therefore necessary to clarify the influence of subsidence on the natural and social environment.
In this study a new approach of engineering geology that deals with subsidence and sinkhole is highlighted. This paper introduces the clarification of the remedial measures related to stability of human settlement districts. It also discusses the conservation of land in an old mining district to enhance a safer environment for the inhabitants in the future.View full abstractDownload PDF (4565K)
Report
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Nobuaki KUCHITSU2010 Volume 50 Issue 6 Pages 329-335
Published: 2010
Released on J-STAGE: March 31, 2013
JOURNAL FREE ACCESSWeathering of Kimachi-stone, Miocene tuffaceous sandstone, was investigated at Shunko-in Temple of Myoshinji, Kyoto City, Japan. Equotip-hardness, erosion, magnetic susceptibility, and color values of each pagoda were measured in this study. Among the stone pagodas made of Kimachi-stone, about 400 year-old, the pagodas preserved inside a shelter show a little bit lower Equotip-hardness than a fresh Kimachi-stone sample. However, the surface erosion of the pagodas inside the shelter is very slight. On the contrary, the pagodas outside the shelter show various Equotip-hardness but generally even lower than those inside the shelter. Moreover, pagodas outside the shelter are normally much more eroded than those inside the shelter. These results lead us to the conclusion that a shelter can reduce weathering of stone pagodas inside it. Magnetic susceptibilities outside the shelter are lower than those of fresh Kimachi-stone, but those inside the shelter are even higher than those of fresh Kimachi-stone. One of a pair door of the shelter has been lost before, but little difference can be pointed out between the Equotip-hardness of the pagoda that is located in front of the lost door and the other pagoda that is located in front of the remaining door. However, microorganisms, such as lichen, are extremely observed only on the pagoda that is located in front of the lost door. Therefore, the lack of front door may influence also on the physical weathering of the stone pagoda inside the shelter in the future. Both of the pagodas, inside and the outside the shelter, show similar color, which fact suggests that the color change of Kimachi-stone has already reached the saturation during these 400 years.View full abstractDownload PDF (4104K) -
Shuichi HASEGAWA2010 Volume 50 Issue 6 Pages 336-344
Published: 2010
Released on J-STAGE: March 31, 2013
JOURNAL FREE ACCESSThe Takamatsu crater is a buried depression structure found by a low gravity anomaly in the southern part of the Takamatsu Plain, northeast Shikoku, Japan (Kono et al, 1991). The Takamatsu crater had been proposed as the first impact crater in Japan and a huge underground reservoir. The debate on the origin and estimation of groundwater of the Takamatsu crater had been continued since 1994, and has ended in 2004. The author has estimated the origin and groundwater of the Takamatsu crater by the CSAMT method and borehole logs. They suggest that the Takamatsu crater is cauldron origin. Limited pumping tests in the cauldron have shown that the pumping capacity was 100-150t/day. Therefore the Takamatsu crater cannot be a huge underground water reservoir. The author has refuted almost every time against one-sided opinions reported by mass media and has explained from the viewpoint of engineering geology. This might prevent troubles and lost the credit with the citizen.View full abstractDownload PDF (5351K) -
Toshihiko SHIMOGAWA, Hideki INAGAKI, Takurou OHKUBO2010 Volume 50 Issue 6 Pages 345-349
Published: 2010
Released on J-STAGE: March 31, 2013
JOURNAL FREE ACCESSRecently, civilian's disaster awareness has risen. And civilian's interest is turned to the operation and maintenance of the housing lot and slope. Therefore, geological research investigation request of the citizens have increased. Authors are involved in the investigation requests of the civilian. In this report, outreach from rail of the geological research was brought together based on these experiences.View full abstractDownload PDF (3958K) -
Tomoyuki TAKAMI, Shuichi HASHIMOTO, Tamotsu OTA2010 Volume 50 Issue 6 Pages 350-356
Published: 2010
Released on J-STAGE: March 31, 2013
JOURNAL FREE ACCESSThe Japan Society of Engineering Geology, Tohoku branch, held open symposiums on being ready for an impending Miyagi near-shore earthquake. Citizens participated in special lectures and a disaster imagination game (DIG). The purpose of these activities is to get people thinking about disaster prevention and being ready for an earthquake by teaching them about geology and groundwater. The content of the symposiums was made into a CD and distributed to related organizations. These activities of the Tohoku branch were reported in the media. And, there were some requests for lectures on disaster prevention and DIG from community associations. The society branch responded to the requests as much as possible, but some problems remain, and it is necessary to cooperate with other related groups. These activities provided the Tohoku branch with a good opportunity to learn what the public thinks about disaster prevention.
Up to now, engineering geology has developed because of its contribution to the resource development, public works and construction sectors. However, in future, it is important to further engineering geology as a social technology through communication with society.View full abstractDownload PDF (7499K)
Short Report
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—Educational Activities Connecting Society and Nature—Isao NAKAI, Ken HASEGAWA, Satoru KOJIMA, Yasuhiro HATTORI, Shigeo YONE ...2010 Volume 50 Issue 6 Pages 357-361
Published: 2010
Released on J-STAGE: March 31, 2013
JOURNAL FREE ACCESSThe Chubu Branch of the Japan Society of Engineering Geology (JSEG) has been conducted an educational activities called “Experience Tour for Kids and Parents” every summer since 2004. The aim of the activities is to avoid from young people from being away from nature. It targets impressionable school children and provides them opportunities to experience nature. It also contributes to development of the engineering geology society. Five tours have been held from 2004 to 2009, and there were 62 families, totally 152 people attended to the tours. The tours included visiting the historical earthquake sites, experience of landslide simulation at the disaster prevention center, collecting and observing fossils and minerals, and laboratory experiments. The tours tend to be more participation-orientated style. For example, participations enjoyed discussion with the professional paleontologist over the fossils they collected during the tour.
Tour information is published in the newspaper along with other publicity methods and we gain a great amount of popularity with applications numbering two times the actual capacity. This might mean that people are not interested in nature but more people are eager to connect with nature. Therefore we believe that one of the missions of JSEG is to provide the opportunities for young people to connect with nature.View full abstractDownload PDF (6078K)
Proposal
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Kouji ISHIKAWA, Hiroyuki OHNO2010 Volume 50 Issue 6 Pages 362-373
Published: 2010
Released on J-STAGE: March 31, 2013
JOURNAL FREE ACCESSSoil Contamination Countermeasures Act was enacted in 2002, and it was revised greatly in 2009. This revised action was caused by several problems such as an increase of the soil contamination not based on this Act, necessity of reasonable countermeasures for each site and necessity of proper processing of soil which carried from sites. It is same as before the revised Act, that the soil contamination investigation is being executed in the specialty by the research agency that the country specified. In the future, thus, geological engineer's role would increase. However, the soil contamination can discover hardly at externals, and it is difficult to decide the source and region of soil contamination. Simultaneously, there is social role and problem for the protection of person's health. For solution of these problems at recent, geological engineer does not achieve role enough, necessarily.
In this paper, based upon recent social situation for soil/groundwater pollution, the authors take a general view of several past cases, and express our opinion about geological engineer's social roles and technical problems in the future.View full abstractDownload PDF (5409K)
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