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06

2020-01

2019年12月29日，同煤集團地煤公司焦煤礦發(fā)生一起流煤眼歘煤事故

12月29日凌晨0：00時(shí)，同煤集團地煤公司焦煤礦305煤眼發(fā)生一起流煤眼歘煤事故，事發(fā)當時(shí)被困6人，經(jīng)礦積極組織搶險救援，目前1人送醫后生命體征平穩，5人已死亡，事故原因正在調查中。

2020-01-06

06

2020-01

2019年1月8日，攀枝花煤業(yè)花山煤礦發(fā)生一起瓦斯窒息事故

1月8日18時(shí)50分，攀枝花煤業(yè)（集團）有限責任公司花山煤礦+1175m石門(mén)新反井發(fā)生一起瓦斯窒息事故，1人死亡，1人受傷。

2020-01-06

06

2020-01

2019年2月21日，四川內江楠木寺煤礦發(fā)生一起頂板事故

2月21日18時(shí)48分，內江市資中縣內江南光有限責任公司楠木寺煤礦5031北采面發(fā)生一起頂板事故，1人死亡。

2020-01-06

06

2020-01

瑞龍鉆具地質(zhì)鉆桿的常規型號？

34（33.5）mm,42mm,50mm,63.5mm,73mm,89mm,108mm.

2020-01-06

06

2020-01

地質(zhì)鉆桿的執行標準是什么？

中華人民共和國煤炭部行業(yè)標準MT/T521-2006.

2020-01-06

06

2020-01

煤礦井下肋骨鉆桿的設計與應用——瑞龍鉆具

鉆桿是鉆進(jìn)工具的主要組成部分之一，在鉆進(jìn)時(shí)，通過(guò)它把動(dòng)力傳遞給巖芯管、鉆并沒(méi)有、鉆具等，由于井下地質(zhì)條件比較復雜，一個(gè)百米深的孔，極有可能即含有較軟的地層，又含有較硬的地層，傳統鉆桿滿(mǎn)足不了這種特殊條件下的鉆進(jìn)要求，給井下鉆探工作帶來(lái)很大的困難，不利于企業(yè)轉型發(fā)展，因此，找出解決難題的辦法至關(guān)重要。通過(guò)對鉆探設備、現場(chǎng)作業(yè)環(huán)境、施工地層進(jìn)行分析，對傳統鉆桿鉆探的整個(gè)過(guò)程進(jìn)行研究。傳統鉆桿主要有外平

2020-01-06

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