目前加拿大东部地区的煤矿大都进入海下采煤。悉尼煤田属石炭纪地层,赋存有10层烟煤,其中有4层可采(1.35米以下不采)。1880年有的矿就进入海下采煤,大规模开采则起始于1924年。诺瓦斯科夏省悉尼市的开普·布雷敦国营开发公司所属的林格矿、卜林斯矿及26号矿均为海下采煤矿井。三个矿共日产商品煤一万四千吨,其中86％是从海下采出的。林格矿日产8000吨,全矿职工900人,全员效率近9吨。 At present, most of the coal mines in eastern Canada go underground for coal mining. The Sydney Coalfield is a Carboniferous formation that contains 10 layers of bituminous coal, of which 4 are recoverable (1.35 m or less). Some mining in 1880 entered the sea under the sea, large-scale mining began in 1924. The Lingerie Mine, Brins Mine and No. 26 Mine owned by the Cape Breton State Development Company in Sydney, Nova Scotia, are all subsea mining mines. The three mines produced a total of 14,000 tons of Nissan commodity coal, 86% of which were taken from the sea. Ringer 8,000 tons per day, all mine employees 900 people, full efficiency of nearly 9 tons.