GB2103693B - Mine-roof supports - Google Patents

Mine-roof supports

Info

Publication number
GB2103693B
GB2103693B GB08124219A GB8124219A GB2103693B GB 2103693 B GB2103693 B GB 2103693B GB 08124219 A GB08124219 A GB 08124219A GB 8124219 A GB8124219 A GB 8124219A GB 2103693 B GB2103693 B GB 2103693B
Authority
GB
United Kingdom
Prior art keywords
mine
roof supports
roof
supports
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
GB08124219A
Other versions
GB2103693A (en
Inventor
Richard Arthur Naylor
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.)
DOWTY HUCKNALL Ltd
Original Assignee
DOWTY HUCKNALL Ltd
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 by DOWTY HUCKNALL Ltd filed Critical DOWTY HUCKNALL Ltd
Priority to GB08124219A priority Critical patent/GB2103693B/en
Priority to CA000407538A priority patent/CA1165572A/en
Publication of GB2103693A publication Critical patent/GB2103693A/en
Application granted granted Critical
Publication of GB2103693B publication Critical patent/GB2103693B/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
    • E21D23/0013—Frame type supports
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E21D23/063—Retractable cantilever extensions therefor
GB08124219A 1981-08-07 1981-08-07 Mine-roof supports Expired GB2103693B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB08124219A GB2103693B (en) 1981-08-07 1981-08-07 Mine-roof supports
CA000407538A CA1165572A (en) 1981-08-07 1982-07-19 Mine-roof supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08124219A GB2103693B (en) 1981-08-07 1981-08-07 Mine-roof supports

Publications (2)

Publication Number Publication Date
GB2103693A GB2103693A (en) 1983-02-23
GB2103693B true GB2103693B (en) 1984-09-05

Family

ID=10523784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08124219A Expired GB2103693B (en) 1981-08-07 1981-08-07 Mine-roof supports

Country Status (2)

Country Link
CA (1) CA1165572A (en)
GB (1) GB2103693B (en)

Also Published As

Publication number Publication date
CA1165572A (en) 1984-04-17
GB2103693A (en) 1983-02-23

Similar Documents

Publication Publication Date Title
CS144682A2 (en) Pletaci stroj
CS256382A2 (en) Zpusob vyroby prostaglandinovych derivatu
BG48180A1 (en) Stereocomparator
CS179682A2 (en) Zpusob vyroby heterocyklickych derivatu guanidinu
GB2103693B (en) Mine-roof supports
CS15282A1 (en) Zdroj srovnavaciho napeti
CS157082A2 (en) Zpusob vyroby derivatu guanidinu
ZA817168B (en) Supports
KR850000695Y1 (en) Support
CA48859S (en) Hairslide
CA48858S (en) Bobbypin
CA48729S (en) Infiltrometer
CA47741S (en) Walking-board
AU82994S (en) support
BG41674A1 (en) Stabilograph
AU85813S (en) woodstove
CS224881A1 (en) Zapojeni obvodu fazoveho rizeni vicefazovych elektrickych zarizeni
CS224781A1 (en) Zapojeni obvodu fazoveho rizeni vicefazovych elektrickych zarizeni
CS222282A2 (en) Zpusob pripravy derivatu aminosulfenylchloridu
CS196181A1 (en) Zpusob indikace pritomnosti esteroveho tvrdidla
CS182581A1 (en) Kopirovaci papir
CS180181A1 (en) Dvojstupnova hydrostaticka prevodovka
BG35558A1 (en) Devider- separator
AU83568S (en) key-blank
CS165183A2 (en) Zpusob vyroby novych derivatu arylfenyletheru

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee