我国西部地区疆域辽阔，人口稀少。陕西、甘肃、四川和重庆等10个省、区、市，拥有土地面积538万平方公里，占全国国土面积的56％。各类自然资源，如石油、天然气、煤、有色金属、稀有金属、稀土、钾、磷等矿产资源极为丰富，远景储量十分可观。根据探明的储量，仅西部地区的煤 China’s western region has a vast territory and sparse population. Shaanxi, Gansu, Sichuan and Chongqing 10 provinces, autonomous regions and municipalities, with an area of ​​5380000 square kilometers of land, accounting for 56% of the country’s land area. All kinds of natural resources such as oil, natural gas, coal, non-ferrous metals, rare metals, rare earths, potassium, phosphorus and other mineral resources are extremely rich in long-term reserves are considerable. According to the proven reserves, only the western region of coal