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打通二矿上解放层为0.86m 厚的薄煤层,而且具有煤与瓦斯突出危险。为了安全开采这一解放层,本文通过对预报预测突出的钻屑量、软分层厚度、钻孔时的动力现象、钻孔瓦斯涌出初速度、瓦斯解吸特征等诸指标进行了实践分析研究,决定采用“两指标、一现象”的方法做为预测预报该薄煤层突出的指标。并在实践中取得了较好的效果。
Open up the second seam of the liberation of 0.86m thick thin seam, and with coal and gas out of danger. In order to safely exploit this level of liberation, this paper conducts a practical analysis and research on such indicators as the amount of drill cuttings predicted, the thickness of soft strata, the dynamic phenomena during drilling, the initial velocity of gas emission from boreholes, and the gas desorption characteristics. Decided to adopt the “two indicators, a phenomenon” method as a forecast of the thin coal seam prominent indicator. And in practice has achieved good results.