Ontario has approximately 40 underground mines, with about
25,000 workers, located mostly in Northern Ontario. Minerals such
as copper, nickel, gold and other precious metals, diamonds, salt
and gypsum are extracted. Ontario also has several thousand surface
open pits, quarries, sand and gravel operations, with about 10,000
workers. Minerals such as gold, as well as material such as
limestone, sand and gravel are extracted from them.
With over 35,000 employees, labour and employment issues are
obviously of central importance to the mining sector, both in terms
of health and safety and managing employees for optimal
performance, safety and efficiency. In 2018, 2,115 critical
injuries were reported to the Ministry of Labour — 1,760 of
those were industrial, 324 were in construction, and 31 were in the
mining sector.