When Mines Collapse

Natural geological erosion

Recent seismic activity

Human-made issues from historical underground iron mines

Heavy traffic loads on the highway

Increased demand for rare earth elements

Technological advancements in drilling and rock mechanics, and the dangers/costs of surface mining

Depletion of all surface-level mineral deposits

A desire to preserve surface ecosystems

Over-reliance on manual labor

Lack of detailed mine maps and concern for long-term structural integrity after extraction

Frequent flooding due to inadequate drainage systems

Insufficient ventilation leading to gas buildup

It causes the mine shafts to rust and corrode.

It increases the weight on the mine's support structures and can erode surrounding soil and rock.

It creates dangerous gases that weaken the mine's integrity.

It freezes and expands, cracking the mine walls.

Yes

No

It increases the mechanical strength of surrounding soils.

It dissolves soluble minerals and softens materials, reducing support strength.

It causes immediate and catastrophic explosions within the mine.

It has no significant effect on mine stability.

Only as sudden, well-defined sinkholes.

Only as gradual, widespread sinking and settling.

As sudden, well-defined sinkholes or as generalized, broader sinking and settling.

As volcanic eruptions or tsunamis.

Mine subsidence is covered under standard homeowner's insurance.

Mine subsidence is a rare event that doesn't require special coverage.

Typical property insurance specifically excludes damage from mine subsidence.

Mine subsidence insurance is only available in states without historical mining.

It leaves large pillars of coal to support the roof indefinitely.

It intentionally allows the roof behind the hydraulic supports to collapse.

It is primarily used for surface mining operations.

It requires no support structures at all.