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从岩体的岩性、时代、产状等方面，论证了八宝山煤矿北部的正长斑岩体为一岩盖，下部找煤前景可观，可在井下实施巷探和定向钻探找煤，以延长矿井寿命
From the aspects of lithology, age and occurrence of the rock mass, it is demonstrated that the positive porphyry in the northern part of Babaoshan coal mine is a rock cap, the prospect of looking for coal in the lower part is considerable, and coal prospecting and directional drilling can be carried out to find coal in the underground so as to prolong Mine life