GB1250371A - - Google Patents

Info

Publication number
GB1250371A
GB1250371A GB1250371DA GB1250371A GB 1250371 A GB1250371 A GB 1250371A GB 1250371D A GB1250371D A GB 1250371DA GB 1250371 A GB1250371 A GB 1250371A
Authority
GB
United Kingdom
Prior art keywords
conveyor
frame
mine roof
advancing mine
auxiliary prop
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1250371A publication Critical patent/GB1250371A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

1,250,371. Advancing mine roof supports. BONSER ENG., Ltd. 5 March, 1969, No. 11738/69. Heading E1P. In an advancing mine roof support system comprising a frame 7, 8, 9, 10, 11 connected to a face conveyor 2 and supporting a transfer conveyor 4, the frame is provided with an auxiliary prop 12 which is retractable clear of the base to enable the conveyor 4 to take up either one of the two positions shown. In a modification, see Fig. 3 (not shown), the auxiliary prop is pivoted to the roof-engaging member.
GB1250371D 1969-03-05 1969-03-05 Expired GB1250371A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1173869 1969-03-05

Publications (1)

Publication Number Publication Date
GB1250371A true GB1250371A (en) 1971-10-20

Family

ID=9991782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1250371D Expired GB1250371A (en) 1969-03-05 1969-03-05

Country Status (1)

Country Link
GB (1) GB1250371A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112576295A (en) * 2020-12-16 2021-03-30 郑州煤矿机械集团股份有限公司 Supporting advancing mechanism for transportation roadway

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112576295A (en) * 2020-12-16 2021-03-30 郑州煤矿机械集团股份有限公司 Supporting advancing mechanism for transportation roadway

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees