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松藻矿务局打通一矿属煤与沼气突出矿井,主采层8~#煤层为强突出层,其上7~#层为弱突出层、6~#层为非突出层。 长期以来该矿南盘区的解放层开采,一直实行“套采”,即将6~#、7~#两煤层联合布置,同时回采。经过若干年的生产实践证明,这种方式有如下问题:上下煤层工作面的生产互相影响,推进度慢,生产能力不能充分发挥;7~#层巷道承受压力大、变形剧烈,难于维护;套采工作面一次投产准备工程量大,接替困难,时间长等。为了改善这种状况,
Songzao Mining Bureau opened a coal mine and biogas to highlight the mine, the main mining layer 8 ~ # coal seam is a strong protruding layer, the 7 ~ # layer is a weak protruding layer, 6 ~ # layer is non-protruding layer. For a long time, the exploitation of the liberated layer in Nanpan District of the mine has been practiced “set mining”, which will be jointly arranged by 6 ~ # and 7 ~ # coal seams, and at the same time mining. After several years of production practice has proved that this approach has the following problems: the upper and lower coal seam production of mutual influence, slow propulsion, production capacity can not give full play; 7 ~ # tunnel under pressure, severe deformation, difficult to maintain; Mining face a large number of preparation for commissioning, take over the difficulties, a long time. In order to improve this situation,