FR377291A - Device for detaching blocks of coal and rock exposed on more than two sides or undermined from below - Google Patents

Device for detaching blocks of coal and rock exposed on more than two sides or undermined from below

Info

Publication number
FR377291A
FR377291A FR377291DA FR377291A FR 377291 A FR377291 A FR 377291A FR 377291D A FR377291D A FR 377291DA FR 377291 A FR377291 A FR 377291A
Authority
FR
France
Prior art keywords
undermined
coal
sides
rock exposed
detaching blocks
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
Other languages
French (fr)
Inventor
Georg Koenig
Adolf Guetzlaff
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
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR377291A publication Critical patent/FR377291A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/04—Other methods or devices for dislodging with or without loading by devices with parts pressed mechanically against the wall of a borehole or a slit

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)
FR377291D 1907-04-30 1907-04-30 Device for detaching blocks of coal and rock exposed on more than two sides or undermined from below Expired FR377291A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR377291T 1907-04-30

Publications (1)

Publication Number Publication Date
FR377291A true FR377291A (en) 1907-09-03

Family

ID=1423727

Family Applications (1)

Application Number Title Priority Date Filing Date
FR377291D Expired FR377291A (en) 1907-04-30 1907-04-30 Device for detaching blocks of coal and rock exposed on more than two sides or undermined from below

Country Status (1)

Country Link
FR (1) FR377291A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109356586A (en) * 2018-12-14 2019-02-19 新乡市威达机械有限公司 Drilling and the efficient whole coal mining equipment and its application method for playing coal one

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109356586A (en) * 2018-12-14 2019-02-19 新乡市威达机械有限公司 Drilling and the efficient whole coal mining equipment and its application method for playing coal one
CN109356586B (en) * 2018-12-14 2023-08-15 新乡市威达机械有限公司 Drilling and coal lifting integrated efficient whole coal mining device and application method thereof

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