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煤层瓦斯压力测定是煤矿瓦斯防治基础工作之一,其理想的测定条件是穿层钻孔穿透岩层测压,但在井下实际工作中存在测压地点不具备施工穿层钻孔的条件,这就需要采用本煤层顺层钻孔测压技术。由于煤的松软、易破碎、多裂隙等特性,顺层钻孔封孔难度大,现有的测压方法并不适用于本煤层顺层钻孔测压。因此,提出了聚氨酯-预注浆-高压注浆封孔测压方法,并在白羊岭煤矿进行了现场实验,取得了较好的效果。
The coal seam gas pressure measurement is one of the basic work of coal mine gas prevention and control. The ideal measuring conditions are the penetrating formation penetrating strata penetrating formation pressure measurement, but there are some conditions that do not have construction penetrating borehole in the underground work place. You need to use this seam drilling pressure measurement technology. Due to the soft, fragile and multi-fractured characteristics of coal, it is very difficult to seal the borehole with the borehole. The existing pressure measurement method is not suitable for the borehole borehole pressure measurement of the coal seam. Therefore, the polyurethane - pre-grouting - high pressure grouting sealing pressure measurement method was proposed, and the field experiment was carried out in the Baiyangling Coal Mine, and achieved good results.