一、留矿全面采矿法的产生我矿有许多极薄矿脉,采幅为1.0～1.4米,倾角为0～90°。过去是根据矿脉倾角来选择采矿方法,即矿脉倾角小于40°时使用全面法(长壁式沿走向推进),倾角大于60°时使用浅孔留矿法。但是当矿脉倾角处于40～60°之间时,采矿方法就难以确定,只好勉强地套用留矿法或全面法进行采矿。结果,在生产过程中出现了一系列的不治之 First, leaving the mining method of mining a comprehensive mine mine has many very thin veins, mining width of 1.0 to 1.4 meters, angle of 0 ~ 90 °. In the past, the mining method was selected based on the dip of the veins, that is, the holistic method (long-wall type propulsion) was used when the inclination of the veins was less than 40 °, and the shallow hole retention method was used when the inclination was greater than 60 °. However, when the inclination of the veins is between 40 and 60 °, the mining method is difficult to determine and barely applies the method of deposit retention or comprehensive mining. As a result, a series of incurable diseases took place in the production process