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煤层遭受岩浆岩侵入,被吞蚀破坏的现象,在我国东部一些煤矿,如阜新、兴隆、井陉、淮北等都比较严重,其中尤以河北省三河煤田为甚。该煤田中的三河煤矿原设计为年产60万吨的中型矿井,自1979年7月投产以来,平均年产量仅6万吨左右,远远达不到设计能力。在生产过程中,从巷道揭露的岩浆岩侵入情况来看,以煤层顶底板为界,岩浆岩在煤层中上下穿插,空间位置变化极大,使煤层的原生结构和稳定性均遭到严重破坏,根本无法进行正规生产。原设计采用走向长壁采煤法,投产后被迫采用落后的巷道落垛采煤法。同时生产实践证明,原勘探
The coal seam was invaded by magmatic rocks and was swallowed and destroyed. Some coal mines in eastern China, such as Fuxin, Xinglong, Jingxing and Huaibei, are more serious, especially in the Three Rivers in Hebei Province. The Sanhe coal mine in the coalfield was originally designed as a medium-sized mine with an annual output of 600,000 tons. Since it was put into operation in July 1979, the average annual output is only about 60,000 tons, which is far from the design capability. In the process of production, according to the magma intrusion revealed in the roadway, the magmatic rocks interpenetrate up and down in the coal seam with the top and bottom of the coal seam, and the space position changes greatly, so that the primary structure and stability of the coal seam are severely damaged , Simply can not be formally produced. The original design to adopt longwall coal mining method, put into operation after the forced fall latrine coal mining law. At the same time, production proved that the original exploration