choke-damp

A miner checks for choke-damp in the tunnel with a safety lamp.

Definition

1. Noun:
   • A suffocating gas: "choke-damp" refers to a heavy, often odorless gas (primarily carbon dioxide) found in mines, wells, or other enclosed spaces. It displaces oxygen and can cause suffocation or death if inhaled in sufficient quantity.
   • Mining hazard: In mining contexts, "choke-damp" is a specific term for an asphyxiant gas mixture that accumulates in poorly ventilated areas, posing a danger to workers.

Usage Examples

• Noun:
  • The miners were warned about the presence of choke-damp in the deep shaft. (A dangerous, suffocating gas in the mine.)
  • Choke-damp is often more dangerous than fire-damp because it is odorless and invisible. (The gas is hard to detect without equipment.)

Advanced Usage

• "to be overcome by choke-damp": to be rendered unconscious or killed by inhaling the gas.

  • Several workers were overcome by choke-damp after entering the abandoned tunnel. (They lost consciousness or died due to the gas.)

• "choke-damp pocket": a localized accumulation of the gas in a mine.

  • The rescue team carefully avoided any choke-damp pockets during their search. (Areas where the gas had collected.)

Variants and Related Words

• Damp (n): a dangerous gas or vapor in a mine (often used in compounds like "fire-damp" or "choke-damp").

  • The old miner knew all the types of damp that could lurk in the tunnels. (General term for mine gases.)

• Choke (v): to obstruct the breathing of; to suffocate.

  • The thick smoke began to choke the trapped animals. (To prevent breathing.)

Synonyms

• Blackdamp: another term for choke-damp, especially in coal mining.
• Afterdamp: a similar gas mixture that remains after a mine explosion, also containing carbon dioxide.

Related Idioms

• Like a choke-damp: used metaphorically to describe something that suffocates or stifles progress or life.
  • The oppressive regulations hung over the industry like a choke-damp. (The rules were stifling and dangerous to growth.)

Notes for Language Learners

• Etymology: "Choke-damp" combines "choke" (to suffocate) and "damp" (a mining term for a harmful gas). It is a compound noun, not a verb or adjective.
• Common confusions: Do not confuse "choke-damp" with "fire-damp" (methane, which is explosive) or "white damp" (carbon monoxide, which is poisonous). Each is a distinct mine gas.