一、现状近30年来,随着采矿技术的不断进步,有底柱和无底柱崩落法作为一种效率高、成本较低、生产安全,能够适应多种采矿技术条件的采矿方法,在我国黑色、有色、化工、建材等矿山有较快的发展。各类矿床开采均占有较大比重(表1)。1985年,我国铁矿和有色矿山应用这种方法采出的矿石量均超过1千万吨以上。 First, the status quo Nearly 30 years, with the continuous progress of mining technology, bottomed and bottomless pillar caving method as a high efficiency, low cost, production safety, able to adapt to a variety of mining technology and mining methods in our country Black, nonferrous metals, chemicals, building materials and other mines have a faster development. All kinds of ore deposits account for a large proportion (Table 1). In 1985, China’s iron ore and non-ferrous mines using this method to recover the ore volume are more than 10 million tons.