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块煤产出率直接关系到煤矿的经济效益,因此,提高块煤产出率对煤矿生产具有重要意义。笔者就这一问题在山东省章丘市上庄煤矿进行了利用倾斜布孔微差爆破塌落采煤法提高块煤产出率的实验研究。 上庄矿主采煤层为煤10_(-2),厚度1.7m,走向近东西向北倾斜,倾角10°左右。煤层中等硬度,摩氏硬度一般在2.74左右,容
The output rate of lump coal is directly related to the economic benefits of coal mines. Therefore, increasing lump coal output rate is of great significance to coal mine production. The author of this issue in Shangqiu Coal Mine in Zhangqiu City, Shandong Province, conducted an experimental study using lopsided micropore blasting coal mining method to improve lump coal yield. The coal seam of the Shangzhuang Mine is coal 10 _ (-2) with a thickness of 1.7m and is inclined to the east and west to the north with an inclination of about 10 °. Middle seam hardness, Mohs hardness is generally about 2.74, capacity