论文部分内容阅读
开采保护层是释放被保护层内瓦斯，降低其浓度的有效方法之一。被保护层巷道及切眼的布置位置、掘进时间等直接受下保护层开采的影响，因而需合理布置被保护层巷道，正确选择掘进顺序与掘进时间。此外，提出了下保护层开采时被保护层巷道布置与施工中应注意的问题。
Mining protective layer is to release the gas inside the protected layer, and reduce the concentration of one of the effective methods. The protected roadway and the place of cut and placement of the cut eye and the driving time are directly affected by the exploitation of the lower protective layer. Therefore, it is necessary to reasonably arrange the roadway of the protected layer and correctly select the sequence of excavation and the time of excavation. In addition, the problems that should be paid attention to in the layout and construction of roadway in the protective layer during the exploitation of the lower protective layer are proposed.