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Asia Navigation Conference 2009

作者： Keiji SASAYA Masao FURUSHO Yoshiji YANO Toyama National College of Maritime Technology Graduate School of Maritime Sciences Kobe University 1-2 EbieNeriyaImizu city Toyama Prefecture

＜正＞*** Whether it is labor at sea or on land,the protection of the life,body,and health of workers is more important than anything *** number of Japanese mariners or seafarers working at sea in Japan is 74,618（2007）,a number that is extremely small compared to the total working population of approximately 63,000,000 workers（2007）.The ratio of accidents involving mariners（occupational accidents causing absences of more than four days）,however,is consistently higher when compared with occupational accidents on land（See Fig.1 and Fig.2）.

关键词： safety and health Mariner’s accident Mariners Law

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Effects of longwall-induced stress and deformation on the stability and mechanical integrity of shale gas wells drilled through a longwall abutment pillar

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International Journal of Mining Science and Technology 2017年第1期27卷 115-120页

作者： Daniel W.H.Su National Institute for Occupational safety and health Bruceton 15236PAUSA

This paper presents the results of a comprehensive study conducted by CONSOL Energy, Marcellus Shale Coalition, and Pennsylvania Coal Association to evaluate the effects of longwall-induced subsurface deformations on the mechanical integrity of shale gas wells drilled over a longwall abutment *** primary objective is to demonstrate that a properly constructed gas well in a standard longwall abutment pillar can maintain mechanical integrity during and after mining operations. A study site was selected over a southwestern Pennsylvania coal mine, which extracts 457-m-wide longwall faces under about 183 m of cover. Four test wells and four monitoring wells were drilled and installed over a 38-m by84-m centers abutment pillar. In addition to the test wells and monitoring wells, surface subsidence measurements and underground coal pillar pressure measurements were conducted as the 457-m-wide longwall panels on the south and north sides of the abutment pillar were mined by. To evaluate the resulting coal protection casing profile and lateral displacement, three separate 60-arm caliper surveys were conducted. This research represents a very important step and initiative to utilize the knowledge and science obtained from mining research to improve miner and public safety as well as the safety and health of the oil and gas industries.

关键词： Gas well Casing Abutment pillar Stability safety and health Instrumentation Numerical simulation

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