CA809381A - Roof supports for mine workings - Google Patents

Roof supports for mine workings

Info

Publication number
CA809381A
CA809381A CA809381A CA809381DA CA809381A CA 809381 A CA809381 A CA 809381A CA 809381 A CA809381 A CA 809381A CA 809381D A CA809381D A CA 809381DA CA 809381 A CA809381 A CA 809381A
Authority
CA
Canada
Prior art keywords
roof supports
mine workings
workings
mine
roof
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA809381A
Inventor
M. Groetschel Karl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA809381A publication Critical patent/CA809381A/en
Expired legal-status Critical Current

Links

CA809381A Roof supports for mine workings Expired CA809381A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA809381T

Publications (1)

Publication Number Publication Date
CA809381A true CA809381A (en) 1969-04-01

Family

ID=36279897

Family Applications (1)

Application Number Title Priority Date Filing Date
CA809381A Expired CA809381A (en) Roof supports for mine workings

Country Status (1)

Country Link
CA (1) CA809381A (en)

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