房山区矿产资源储量丰富,其中煤炭18.5亿吨,石灰石109亿吨,生产水泥的原料石灰岩和配料用土、砖用粘土以及生产石灰、砂石等建筑材料用的原料更是常掘不衰。这也造就了房山区现有的以资源为主的工业产品结构和以建材业、建筑业作为支柱行业的经济发展格局。房山区的“五小”企 Fangshan District has abundant reserves of mineral resources, including 1.85 billion tons of coal and 10.9 billion tons of limestone. The raw materials for producing limestone and ingredients for cement, clay for brick and raw materials for building materials such as lime, sand and gravel are more commonly used. This also created the existing resource-based industrial product structure in Fangshan District and the economic development pattern with building materials and construction as the pillar industries. Fangshan District “five small” enterprises