“渐进式”揭煤法在立井近水平煤层的实践

 重庆川九建设有限责任公司施工的寺河矿，年产量达千万吨以上，地质条件复杂，瓦斯涌出量大，煤层赋存厚度达6.62米，为了防止煤与瓦斯突出，在施工潘庄进风立井揭穿3#煤层时，采用了“渐近法”揭煤技术，在立井施工中，有效地防止了煤与瓦斯突出,保证了揭煤安全，加快了立井施工进度。这在对于相同的地质条件下立井预防煤与瓦斯突出提供了借鉴。

"Progressing" Seam Opening Method Practiced to Horizontal Outburst Seam in Mine Shaft

The geological condition of Sihe Mine was complicated,the gas emission value was high and the thickness of the seam deposit was up to 6.62m.In order to prevent the coal and gas outburst,during the mine ventilation shaft sinking through No.3 seam,a "progressive" seam opening technology was applied to effectively prevent the coal and gas outburst.The safety of the seam opening was ensured and the mine shaft construction schedule was speeded up,which could provide the references to prevent the coal and gas outburst in the mine shaft sinking under the similar condition.