{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282680958899072.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2473/shigentosozai1953.103.1195_555"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/shigentosozai1953/103/1195/103_1195_555/_pdf"}},{"identifier":{"@type":"NAID","@value":"130007256100"}}],"dc:title":[{"@language":"ja","@value":"炭鉱坑内における基礎および適用化試験について"},{"@language":"en","@value":"Fundamental Tests and Operational Suitability Tests on the Fields"}],"dcterms:alternative":[{"@language":"ja","@value":"高速水噴流による大口径ボーリングに関する研究 (第2報)"},{"@language":"en","@value":"Large diameter boring by using water jets (2nd Report)"}],"description":[{"type":"abstract","notation":[{"@language":"en","@value":"In this report, the results of large diameter drilling tests in coal seams assisted with water jetsare described.<BR>The results of these tests are summarized as follows.<BR>(1) The length of the longest drill hole in the coal seam is 70m at Taiheiyo coal mine and thediameter of the most enlarged borehole is about 700mm at Akabira coal mine.<BR>(2) Some measurements on the fundamental tests (gas flow, volume of cuttings, reduction of the stressin coal seam etc.) during drilling of the borehole indicated that a large diameter borehole made by using water jets wasas effective as drilling with the conventional methods.<BR>(3) The penetration rate on the fundamental tests was 3.5 times as fast as with the conventionalmethod and it on the operational suitability tests was 1.5 times as fast as conventional method and the time to set up thedrilling unit was reduced to 50%"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410282680958899073","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000392602778"}],"foaf:name":[{"@language":"ja","@value":"大賀 光太郎"},{"@language":"en","@value":"OHGA Kotaro"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Faculty of Engineering, Hokkaido Univ."},{"@language":"ja","@value":"北海道大学工学部資源開発工学科"}]},{"@id":"https://cir.nii.ac.jp/crid/1030003658317786752","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"20002040"},{"@type":"NRID","@value":"1000020002040"},{"@type":"NRID","@value":"9000392605946"},{"@type":"NRID","@value":"9000392601866"},{"@type":"NRID","@value":"9000008395840"},{"@type":"NRID","@value":"9000008881329"},{"@type":"NRID","@value":"9000004982423"},{"@type":"NRID","@value":"9000256436958"},{"@type":"NRID","@value":"9000008877308"},{"@type":"NRID","@value":"9000392607245"},{"@type":"NRID","@value":"9000392602909"},{"@type":"NRID","@value":"9000392607476"},{"@type":"NRID","@value":"9000256435599"},{"@type":"NRID","@value":"9000256434581"},{"@type":"NRID","@value":"9000392603837"},{"@type":"NRID","@value":"9000256437251"},{"@type":"NRID","@value":"9000392609371"},{"@type":"NRID","@value":"9000392606433"},{"@type":"NRID","@value":"9000392605837"},{"@type":"NRID","@value":"9000392602043"},{"@type":"NRID","@value":"9000009250797"},{"@type":"NRID","@value":"9000008396441"},{"@type":"NRID","@value":"9000392602779"},{"@type":"NRID","@value":"9000392605299"},{"@type":"NRID","@value":"9000000216634"}],"foaf:name":[{"@language":"ja","@value":"樋口 澄志"},{"@language":"en","@value":"HIGUCHI Kiyoshi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Faculty of Engineering, Hokkaido Univ."},{"@language":"ja","@value":"北海道大学工学部資源開発工学科"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282680958899072","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000392602780"}],"foaf:name":[{"@language":"ja","@value":"上原 正文"},{"@language":"en","@value":"UEHARA Masabumi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"The Coal Mining Research Centre"},{"@language":"ja","@value":"(財) 石炭技術研究所"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03694194"},{"@type":"EISSN","@value":"21856729"}],"prism:publicationName":[{"@value":"日本鉱業会誌"},{"@language":"ja","@value":"日本鑛業會誌"},{"@language":"en","@value":"Journal of the Mining and Metallurgical Institute of Japan"},{"@language":"en","@value":"Journal of the Mining Institute of Japan"},{"@language":"ja","@value":"日本鑛業會誌"}],"dc:publisher":[{"@language":"en","@value":"The Mining and Materials Processing Institute of Japan"},{"@language":"ja","@value":"一般社団法人 資源・素材学会"}],"prism:publicationDate":"1987","prism:volume":"103","prism:number":"1195","prism:startingPage":"555","prism:endingPage":"561"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"https://www.jstage.jst.go.jp/article/shigentosozai1953/103/1195/103_1195_555/_pdf"}],"availableAt":"1987","dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2002271973"},{"@type":"CROSSREF","@value":"10.2473/shigentosozai1953.103.1195_555"},{"@type":"CIA","@value":"130007256100"},{"@type":"OPENAIRE","@value":"doi_dedup___::ac0a81ddcb1de1e031e234a23a803094"}]}