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阳泉一矿北头咀井,是阳泉矿区较典型的高瓦斯矿井,也是我国综采瓦斯最大的矿井。该井为单一煤层开采,开采层为3号煤层(俗称七尺煤层)。煤层平均厚度2m 左右,倾角0°～8°。距3号煤层顶板20～30m有两层不可采2号煤层和1号煤层,累计厚度1m 左右。开采顶板以中等硬度的页岩和细砂岩为主。工作面长160m,使用西德 WS1.7双柱掩护式支架,法国400型双筒采煤机。
Yangquan Tsui first Tsui Tsui wells, Yangquan mine is more typical of high-gas mine, mine is the largest mine in China’s fully mechanized mining. The well is a single coal seam mining, mining layer 3 seam (commonly known as seven feet of coal seam). The average thickness of coal seam about 2m, dip 0 ° ~ 8 °. There are two layers that can not adopt No.2 coal seam and No.1 coal seam from 20-30m of No.3 coal seam roof, and the accumulated thickness is about 1m. The mining roof is dominated by medium-hard shale and fine sandstone. Face length 160m, the use of West Germany WS1.7 double-column shield bracket, France 400 double-tube shearer.