美国每年的荒料石材开采量为40—50万米~3。根据美国矿业局的数据,从1954年以来,饰面石材的生产平均每年缩减1.7%。然而近年饰面石材的生产和需求水平出现稳定,预计未来这两项指标将每年增长1.4%。在饰面石材中,石灰岩、页岩和花岗岩的生产最为稳定。在美国,饰面石材的主要需求范围是民用 In the United States, the annual output of block stone is 40-500,000 m 3 . According to the US Bureau of Mines, since 1954, the production of decorative stone has averaged 1.7% annually. However, in recent years, the production and demand level of decorative stone has stabilized, and it is expected that these two indicators will increase by 1.4% each year in the future. Among the decorative stones, the production of limestone, shale and granite is the most stable. In the U.S., the major demand for decorative stone is civil