Behind the prosperous production and management of modern Kailuan Mines, coal calamities broke out constantly and were hard to stop, and the heavy casualties were astonishing.

近代开滦煤矿在其生产经营繁荣的背后，矿难却是频发不断、难以遏止，矿难造成的惨重伤亡更是让人触目惊心。