试验的布置 试验地点在Mausegatt煤层,煤层倾角55-60°,厚约90厘米。在Hausegatt煤层有很坚固的片砂岩围岩,然而煤层顶板有60厘米厚的片砂岩遇水会发生滑移。用风镐开采时曾多次发生煤的崩落,故不得不考虑用机械化开采。试验布置如图1所示。用钻孔将煤层分成约20米宽和104米长的煤带。然后用钻孔机和载煤机作开切眼,再用冲击铇煤机采煤。在开采第二个煤带之前,应将采空区充填。回采方式是后退式采煤法。 The test site was set up at the Mausegatt seam with a coal seam angle of 55-60 ° and a thickness of about 90 cm. The Hausegatt seam has very strong sandstone around the sandstone, however, the sandstone 60 cm thick on the coal seam roof slides with water. Mining with picks coal mining has repeatedly occurred, it had to consider the use of mechanized mining. Test layout shown in Figure 1. Drilling the coal seam into coal strands of about 20 meters in width and 104 meters in length. Then use the drill and coal loader for open cut, and then impact coal mining machine. The gob should be filled before the second coal seam is mined. Back-mining method is backward mining method.