CA770361A - Roof supports for mine workings - Google Patents

Roof supports for mine workings

Info

Publication number
CA770361A
CA770361A CA770361A CA770361DA CA770361A CA 770361 A CA770361 A CA 770361A CA 770361 A CA770361 A CA 770361A CA 770361D A CA770361D A CA 770361DA CA 770361 A CA770361 A CA 770361A
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
CA770361A
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 CA770361A publication Critical patent/CA770361A/en
Expired legal-status Critical Current

Links

CA770361A Roof supports for mine workings Expired CA770361A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA770361T

Publications (1)

Publication Number Publication Date
CA770361A true CA770361A (en) 1967-10-31

Family

ID=36213765

Family Applications (1)

Application Number Title Priority Date Filing Date
CA770361A Expired CA770361A (en) Roof supports for mine workings

Country Status (1)

Country Link
CA (1) CA770361A (en)

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