Rock Bursts in the Lake Superior Copper Mines, Keweenaw Point, Michigan

One of 1,473 reports in the series: United States Bureau of Mines Reports available on this site.

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Description

From Introduction: "The effect of rock pressure may be general and continuous disintegration and reduction in size of pillars of ore and rock left for the support of the workings, resulting in the collapse of hanging wall and the closing of stopes, drifts, and shafts, or the action may be sudden and violent and aside from seriously affecting the workings may present a real hazard to the operation of mines. The object in the preparation of this report is to add to the accumulated information and from the facts presented to make suggestions for protective measures to be taken when ... continued below

Physical Description

48 p. : ill.

Creation Information

Crane, W. R. 1929.

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This report is part of the collection entitled: Technical Report Archive and Image Library and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 246 times , with 4 in the last month . More information about this report can be viewed below.

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  • Main Title: Rock Bursts in the Lake Superior Copper Mines, Keweenaw Point, Michigan
  • Series Title: United States Bureau of Mines Reports
  • Added Title: United States Bureau of Mines Bulletin 309

Description

From Introduction: "The effect of rock pressure may be general and continuous disintegration and reduction in size of pillars of ore and rock left for the support of the workings, resulting in the collapse of hanging wall and the closing of stopes, drifts, and shafts, or the action may be sudden and violent and aside from seriously affecting the workings may present a real hazard to the operation of mines. The object in the preparation of this report is to add to the accumulated information and from the facts presented to make suggestions for protective measures to be taken when possible."

Physical Description

48 p. : ill.

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Technical Report Archive and Image Library

This selection of materials from the Technical Report Archive and Image Library (TRAIL) includes hard-to-find reports published by various government agencies. The technical publications contain reports, images, and technical descriptions of research performed for U.S. government agencies. Topics range from mining, desalination, and radiation to broader physics, biology, and chemistry studies. Some reports include maps, foldouts, blueprints, and other oversize materials.

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Creation Date

  • 1929

Added to The UNT Digital Library

  • Feb. 21, 2010, 11:09 p.m.

Description Last Updated

  • Feb. 6, 2017, 10:59 a.m.

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Citations, Rights, Re-Use

Crane, W. R. Rock Bursts in the Lake Superior Copper Mines, Keweenaw Point, Michigan, report, 1929; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc12481/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.