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马村矿中马村井,于1977年12月18日发生了第六次煤与瓦斯突出,地点在中马村井田17采区。当时在采区西边界掘1721临时回风上山与东总回风巷构通。这条上山先从-66米水平的东总回风巷开口,以30°角向煤层掘岩石上山。揭开煤层后顺煤层顶板倾斜向下掘进8米,因运输困难而停止,改为自1721回风巷沿煤层倾斜向上对穿贯通(见图)。下面介绍一下我们予报这次突出的情况。
Magura mine in Macunjing, on December 18, 1977 occurred in the sixth coal and gas outburst, the site in the Zhongmacun minefield 17 mining area. At that time, the mining area west border excavation 1721 temporary return wind up the mountain and the East total return air lane structure. This uphill first from the -66 meters level east total return airway openings, 30 degrees angle to the coal seam rock up the mountain. After uncovering the coal seam, the coal seam roof slab is dug down 8 meters obliquely and stopped due to transportation difficulties. Instead, the coal seam is channeled diagonally upwards through the return airway at 1721 (see figure). Let us introduce the outstanding situation we have reported.