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一、矿井概况三矿管辖两对生产矿井,年产75万吨左右。井田煤系内有可采煤层三层,主采的煤二层平均厚22m,赋存稳定、结构复杂,属特厚易燃煤层。煤一层平均厚2.0m,煤三层平均厚1.3m,煤层结构均简单,但仅能局部开采。煤层倾角浅部8°～15°,深部可达60°以上。煤二层采用走向长壁倾斜分层(急倾斜采用水平分层)金属网假顶下行陷落法采煤。在分层开采过程中,用黄土灌浆的措施来消除煤炭自然发火等隐患。两井巷道布置方式相同。即分层回采巷
First, the mine profile Three mines jurisdiction of two pairs of production mines, with an annual output of about 750,000 tons. There are three layers of mineable coal seam in the coalfield of Ida. The average thickness of the main coal in the second layer is 22m. It has stable occurrence and complex structure and belongs to the special thick and flammable coal seam. The average thickness of coal layer 2.0m, the average thickness of three coal 1.3m, coal seam structure are simple, but only local mining. Seam angle shallow 8 ° ~ 15 °, deep up to 60 °. The second coal seam adopts longwall sloping stratification (steeply inclined horizontal stratification), and the metal mesh roof flies downward descending method to mine coal. In stratified mining process, loess grouting measures to eliminate the natural coal fire and other hidden dangers. The layout of two tunnels is the same. Layered mining Lane