GB538277A - Improvements relating to mine roof or like supports - Google Patents
Improvements relating to mine roof or like supportsInfo
- Publication number
- GB538277A GB538277A GB113340A GB113340A GB538277A GB 538277 A GB538277 A GB 538277A GB 113340 A GB113340 A GB 113340A GB 113340 A GB113340 A GB 113340A GB 538277 A GB538277 A GB 538277A
- Authority
- GB
- United Kingdom
- Prior art keywords
- main
- relief valve
- pressure
- prop
- cap
- 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
Links
- 239000002184 metal Substances 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/46—Telescopic props with load-measuring devices; with alarm devices
- E21D15/465—Telescopic props with load-measuring devices; with alarm devices with essential hydraulic or pneumatic details
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/52—Extensible units located above or below standard props
- E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Safety Valves (AREA)
Abstract
538,277. Pit-props. SMITH W. H. Jan. 18, 1940, No. 1133. [Class 20 (ii)] A mine-roof support comprises a main body-portion, a cap por. tion in the form of a sleeve fitting over the main portion fluid-pressure adjusting meams between the main and cap portions, and a relief valve operable from a distance to allow collapse of the support. The main prop body -A may be reinforced-con. crete covered at its upper end by a metal sleeve C to which is attached a bucket washer G tc secure tightness between the body and a cylinder cap B, which has limited movement on the main body. An inlet valve F for the pressure fluid and a relief valve H are provided in the cylinder wall, the. latter being controlled by a lever and a chain from a remote position. If the pressure on the prop becomes excessive, the pressure water may be caused to be ejected through the relief valve at high velocity so as to give visible and audible warning. As an alternative, the main prop body may be tubular and of corrugated metal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB113340A GB538277A (en) | 1940-01-18 | 1940-01-18 | Improvements relating to mine roof or like supports |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB113340A GB538277A (en) | 1940-01-18 | 1940-01-18 | Improvements relating to mine roof or like supports |
Publications (1)
Publication Number | Publication Date |
---|---|
GB538277A true GB538277A (en) | 1941-07-28 |
Family
ID=9716730
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB113340A Expired GB538277A (en) | 1940-01-18 | 1940-01-18 | Improvements relating to mine roof or like supports |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB538277A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133720A (en) * | 1962-03-27 | 1964-05-19 | Commercial Shearing | Yieldable pit posts |
FR2297994A1 (en) * | 1975-01-15 | 1976-08-13 | Banyaszati Kutato Intezet | Telescopic hydraulic pit prop - has tube from valve housing with radial ribs to inside of upper prop section |
CN102444412A (en) * | 2011-07-04 | 2012-05-09 | 山东新煤机械有限公司 | Integrated intelligent mine pressure detection warning indicator |
ES2636833A1 (en) * | 2017-03-15 | 2017-10-09 | Universitat Politècnica De València | Load limiter for telescopic work props (Machine-translation by Google Translate, not legally binding) |
CN117927278A (en) * | 2024-03-22 | 2024-04-26 | 山东科技大学 | Constant-resistance regulation and control monitoring device and method for steel pipe concrete pier column and construction method |
-
1940
- 1940-01-18 GB GB113340A patent/GB538277A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133720A (en) * | 1962-03-27 | 1964-05-19 | Commercial Shearing | Yieldable pit posts |
FR2297994A1 (en) * | 1975-01-15 | 1976-08-13 | Banyaszati Kutato Intezet | Telescopic hydraulic pit prop - has tube from valve housing with radial ribs to inside of upper prop section |
CN102444412A (en) * | 2011-07-04 | 2012-05-09 | 山东新煤机械有限公司 | Integrated intelligent mine pressure detection warning indicator |
ES2636833A1 (en) * | 2017-03-15 | 2017-10-09 | Universitat Politècnica De València | Load limiter for telescopic work props (Machine-translation by Google Translate, not legally binding) |
CN117927278A (en) * | 2024-03-22 | 2024-04-26 | 山东科技大学 | Constant-resistance regulation and control monitoring device and method for steel pipe concrete pier column and construction method |
CN117927278B (en) * | 2024-03-22 | 2024-06-04 | 山东科技大学 | Constant-resistance regulation and control monitoring device and method for steel pipe concrete pier column and construction method |
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