我国的非金屬矿工业,經过几年来的大发展,几种主要产品产量都大幅度地增长;同时,近一年多来,在技术改造方面,也取得了不小的成績,許多企业的生产技术水平都有了很大提高。在采矿方面,有些矿山由过去的非正規开采,逐步走向了坑道开采,有的从巷道采矿法走向采場采矿法,露天矿也逐步走向阶梯开采。如土貴烏拉云母矿,已建立了較正規的开拓系統,由巷道采矿法改为全层开采的水平充填采矿法,因而做到貧富兼采,回采率大大提高,生产有了节奏,也保証了安全。在选矿方面,很多石棉矿放下了竹篩、簸箕,建立了土洋結合的簡易选矿厂和水力选矿。如四川 After several years of rapid development, the output of several major products in our country’s non-metallic mining industry has increased substantially. At the same time, in the past year and more, technological improvements have also achieved remarkable results. Many enterprises Production technology have greatly improved. In the area of ​​mining, some mines have gradually moved from the informal mining in the past to the tunneling, some from the roadway mining method to the stope mining method, and the open pit mine has gradually moved to step mining. For example, the Guiwula mica mine has established a more formal exploration system and has been transformed from a roadway mining law into a horizontal mining method with full-seam mining, thereby achieving both rich and poor mining and greatly enhanced recovery rate with a rhythm of production and guaranteed Safe In mineral processing, many asbestos mines put down bamboo sieve, dustpan, established a combination of earth and soil simple beneficiation and hydraulic beneficiation. Such as Sichuan