蛟河煤矿是一个老矿,现有生产区集中于煤田东部。过去的资料认为,煤田有七个可采煤层,含煤组均位于基底角砾岩上部。 一九七五年我们在原开采区开展老矿挖潜地质勘探工作,在基底角砾岩下面,找到了八号煤层。一九七八年四月钻穿第二层角砾岩,也找到了可采煤层。此时孔深已达1,096.85米,未再延伸。在这批钻孔中,大 Jiaohe coal mine is an old mine, the existing production area focused on the eastern coalfield. According to the past data, there are seven coal mining seams in the coalfield, all of which are above the breccia. In 1975, we carried out the exploration of the potential for the exploration of the old mine in the original mining area. Below the base breccia, we found the No. 8 coal seam. Drilling through the second breccia in April 1978 also found recoverable seams. At this point the hole depth has reached 1,096.85 meters, no longer extended. In this batch of holes, big