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我矿按每年采矿量计算,年形成采空区4.8万米~2,采幅平均以1.2米计算,采空区体积为5.76万米~3,据统计自1959～1979年采空区总面积达90～100万米~2。近几年来随着生产中段下降,已发现有部分采空区上方地表下沉,大量塌方,有些作业中段矿柱破裂,有明显的地压活动象征,采空区充填已是刻不容缓了。(一)造成采空区充填欠账的主要原因造成我矿采空区充填欠帐主要原因有以下几个方面。1.充填料来源问题。一是从地表运入尾矿或
According to the annual mining volume, the mine will form a gob of 48,000m2. The average width of the mined area will be 1.2m. The mined-out area will be 57,600m3. According to the statistics, the total area of the mined-out area from 1959 to 1979 Up to 90 to 100 million meters ~ 2. In recent years, with the decline in the middle of production, it has been found that some of the top of the mined area surface subsidence, a large number of landslides, and some operations in the middle section of pillars rupture, there is a clear symbol of underground pressure activities, gob fill it is imperative. (A) The main reason for causing the gulf to fill up the debts is due to the following reasons. 1. Filling material source problem. First, from the surface into the tailings or