海下煤田的开发

• 作 者: 顾仲德 沈慧铭
• 出 处: 矿山测量
• 发表日期: 2004年期
• 关键词: 煤田 大陆架 球面积 大陆坡 浅海区 海洋面积 地层厚度 深海 地球表面 第三纪

地球表面面积为51010万平方公里,其中大陆只占地球面积的29%,海洋面积占71%。在陆地的外缘,有一条逶迤曲折、时宽时窄的水下平台带,它与陆地唇齿相依,是介于深海与大陆之间的浅海区,这个区域叫做大陆架或大陆棚,水深在200米以内。大陆架外侧是深达几千米的深海区,二者以陡度较大的大陆坡相接。

The surface area of ​​the earth is 510.1 million square kilometers, of which the mainland occupies only 29% of the earth's surface area and the ocean area accounts for 71%. On the outer edge of the land, there is a subducted, wide and narrow underwater platform belt, which is dependent on the land and lips and is a shallow sea area between the deep sea and the mainland. This area is called the continental shelf or the continental shelf and has a depth of 200 meters Within. On the outer side of the continental shelf is a deep sea area of ​​several kilometers deep, both of which are connected by a steeply sloped continental slope.