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- Coal_mine_bump abstract "A coal mine bump (also called a bump, a mine bump, or a mountain bump) is a seismic jolt occurring within a mine, often due to the explosive collapse of a wall or one or more support pillars, sometimes called a rock burst. These pillars are left in place during room and pillar mining, where an original narrow passage is dug and then substantially widened as ore is removed, creating open rooms with support pillars left in place. As the coal is extracted, the pressure is redistributed onto the pillars and can increase to the extent that the pillar explodes like a hand grenade, shooting coal and rock at lethal speeds.In the eastern United States' coalfields, bumps are more likely when the overburden is at least 500 feet (150 m); where a strong, overlying stratum, such as sandstone, occurs near the coalbed; and with a strong, inflexible floor. In the United States, the number of deaths from bumps had dropped off dramatically since the early 1990s, but fatalities are more common in the West where mines often run deeper. Bumps are three times more likely in room-and-pillar mines, and are even more common in mines that do retreat mining, in which the pillars are removed as the miners retreat towards the mine entrance with the intent of allowing an orderly collapse of the mine.".
- Coal_mine_bump wikiPageExternalLink coversheet1535.html.
- Coal_mine_bump wikiPageID "12751801".
- Coal_mine_bump wikiPageLength "3463".
- Coal_mine_bump wikiPageOutDegree "14".
- Coal_mine_bump wikiPageRevisionID "632501115".
- Coal_mine_bump wikiPageWikiLink Canada.
- Coal_mine_bump wikiPageWikiLink Category:Coal_mining.
- Coal_mine_bump wikiPageWikiLink Category:Seismology.
- Coal_mine_bump wikiPageWikiLink Crandall_Canyon_Mine.
- Coal_mine_bump wikiPageWikiLink Hand_grenade.
- Coal_mine_bump wikiPageWikiLink Overburden.
- Coal_mine_bump wikiPageWikiLink Retreat_mining.
- Coal_mine_bump wikiPageWikiLink Robert_E._Murray.
- Coal_mine_bump wikiPageWikiLink Rock_burst.
- Coal_mine_bump wikiPageWikiLink Room_and_pillar.
- Coal_mine_bump wikiPageWikiLink Seismic.
- Coal_mine_bump wikiPageWikiLink Seismology.
- Coal_mine_bump wikiPageWikiLink Springhill,_Nova_Scotia.
- Coal_mine_bump wikiPageWikiLink Springhill_Mining_Disaster.
- Coal_mine_bump wikiPageWikiLink Springhill_mining_disaster.
- Coal_mine_bump wikiPageWikiLink Stratum.
- Coal_mine_bump wikiPageWikiLinkText "Coal mine bump".
- Coal_mine_bump wikiPageWikiLinkText "bump".
- Coal_mine_bump wikiPageWikiLinkText "coal mine bump".
- Coal_mine_bump hasPhotoCollection Coal_mine_bump.
- Coal_mine_bump subject Category:Coal_mining.
- Coal_mine_bump subject Category:Seismology.
- Coal_mine_bump hypernym Jolt.
- Coal_mine_bump type Article.
- Coal_mine_bump type Article.
- Coal_mine_bump comment "A coal mine bump (also called a bump, a mine bump, or a mountain bump) is a seismic jolt occurring within a mine, often due to the explosive collapse of a wall or one or more support pillars, sometimes called a rock burst. These pillars are left in place during room and pillar mining, where an original narrow passage is dug and then substantially widened as ore is removed, creating open rooms with support pillars left in place.".
- Coal_mine_bump label "Coal mine bump".
- Coal_mine_bump sameAs m.02x38k7.
- Coal_mine_bump sameAs Q5137820.
- Coal_mine_bump sameAs Q5137820.
- Coal_mine_bump wasDerivedFrom Coal_mine_bump?oldid=632501115.
- Coal_mine_bump isPrimaryTopicOf Coal_mine_bump.