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贵州遵义地区煤矿开采均为煤层群开采,在对容光煤矿瓦斯压力测定时发现该矿主采煤层C5、C6、C8、C9、C11、C12,层间距相对较小,测压岩石巷道在C12煤层下方,只能施工上向钻孔分别测定各煤层瓦斯压力。为了解决层间距较小、封孔位置不精确造成的所测压力为多层煤混合压的问题,采用大功率注浆泵,独创分时分段注浆封孔的方法,精确控制封孔深度,通过逻辑分析及测定结果与间接法计算结果比较分析,确认准确测得了各煤层的原始瓦斯压力。
Coal mining in Zunyi area of Guizhou Province are all coal group production. When gas pressure measurement of Yunguang coal mine is found, the main coal seams of C5, C6, C8, C9, C11 and C12 are relatively small, Below the coal seam, only gas pressure on each coal seam can be measured separately from the uphole drilling. In order to solve the problems of small interlayer distance and inaccurate sealing position, the measured pressure is the problem of multi-layer coal mixing pressure. By using high-power grouting pump, the original time-division grouting sealing method is used to precisely control the sealing depth , Through the logical analysis and measurement results and indirect method comparative analysis of the results to confirm the accurate measurement of the original coal seam gas pressure.