The British Proclamation of 1763, the war of 1812, geological barriers and the lack of modern-day transportation all provided resistance against westward migration.

英国1763年公告、1812年战争、地理阻隔和现代交通的缺少都对向西迁移产生了阻碍。

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The geological condition is complicated and varies often. Using the method of pre-support through hammering wedge, the cave mouth digging work of No. 640 main transportation channel was successful.

简述了板石矿业公司上青矿640主运输平巷在硐口段施工过程中，克服地质条件复杂、多变的现状，采用撞楔超前支架法施工，硐口掘凿获得成功。

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The port construction, shipping transportation and reclaim land from costal zone are sometimes endangered, which is the characterized geological disaster in Jiangsu Province.

沿岸港口建设、交通航运及滩涂围垦等也不时受到危害，成为江苏海岸带特有的地质灾害。

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