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1直属四井的开采条件(1)开采范围:井田境界是:上部为煤层露头,下部为-200m标高等高线,左部为19线以东75,右部为F29号断层。该井只开采90层,于1986年建井,现已进入斜井二段生产,生产标高为-300m。(2)采煤方法:走向长臂后退式。(3)顶板管理:全部陷落法。(4)工作面个数:两个采煤工
(1) Mining area: Minefield realm is: the upper part is outcrop of coal seam, the lower part is -200m elevation contour line, the left part is 75 to the east of line 19, and the right part is F29 fault. The well is only 90 mining, built in 1986 wells, has now entered the inclined shaft production Sec, production elevation of -300m. (2) mining method: to move back long arm. (3) Roof Management: All Fall Law. (4) the number of face: two coal miners