CA890151A - Position restoring devices for mine roof props - Google Patents

Position restoring devices for mine roof props

Info

Publication number
CA890151A
CA890151A CA890151A CA890151DA CA890151A CA 890151 A CA890151 A CA 890151A CA 890151 A CA890151 A CA 890151A CA 890151D A CA890151D A CA 890151DA CA 890151 A CA890151 A CA 890151A
Authority
CA
Canada
Prior art keywords
mine roof
position restoring
restoring devices
roof props
props
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
CA890151A
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 CA890151A publication Critical patent/CA890151A/en
Expired legal-status Critical Current

Links

CA890151A Position restoring devices for mine roof props Expired CA890151A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA890151T

Publications (1)

Publication Number Publication Date
CA890151A true CA890151A (en) 1972-01-11

Family

ID=36396310

Family Applications (1)

Application Number Title Priority Date Filing Date
CA890151A Expired CA890151A (en) Position restoring devices for mine roof props

Country Status (1)

Country Link
CA (1) CA890151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109236339A (en) * 2018-11-02 2019-01-18 陈成军 Tunnel absorbing shock resistance bracket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109236339A (en) * 2018-11-02 2019-01-18 陈成军 Tunnel absorbing shock resistance bracket
CN109236339B (en) * 2018-11-02 2024-02-27 陈成军 Tunnel shock absorption and impact resistance support

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