揭煤突出模拟试验的相似条件研究

Similar conditions of outburst simulation test for rock cross-cut coal uncovering

为解决石门揭煤突出危险性预测指标现场检验的困难,在对相似理论进行研究的基础上,针对突出发生的力学条件,采用因次分析的方法,对实验室进行突出模拟试验与现场相似的条件进行了分析。据此设计了实验室的突出模拟试验装置。通过在该装置上施加与现场相近的地应力、瓦斯压力进行了突出模拟试验,并在相同条件下对各石门揭煤突出危险性预测指标进行了测定,研究了使用各指标进行预测的准确性。为石门及井筒揭煤突出危险性预测指标的实验室检验创造了条件。

In this paper, to solve the field inspection difficulties for outburst prediction indicators in rock cross-cut coal uncovering, on the basis of similarity theory and the mechanics condition of outburst, the similar conditions of outburst simulation test in laboratory was analyzed by using dimensional analysis method, and the testing equipment for outburst simulation were designed. By applying similar ground stress and gas pressure on the equipment, the outburst simulation test was conducted. Moreover, all the outburst prediction indexes for rock cross-cut coal uncovering were tested under the same condi- tion, and the accuracy of each prediction index was studied. The study in this paper produces conditions for the laboratory examination of outburs prediction indexes in both rock cross-cut and shaft coal un-covering.