石门揭煤过程颗粒流模拟的探讨

Investigation of Particle Flow Simulation During Uncovering Coal Seam in Cross- cut

在石门揭煤的实践过程中,为了预先了解揭煤区域内各单元发生煤与瓦斯突出可能性的大小,运用PFC软件对煤层进行颗粒流的数值模拟来直观预测。由于模拟过程无法兼顾瓦斯压力的影响,对模拟结果和瓦斯压力进行加权计算处理,使得这一结果能较好地反应现场实际情况。通过对模拟结果的综合处理后,得出石门揭煤区域内各单元发生煤与瓦斯突出可能性最大值位于掘进巷道的周围,且越靠近巷道危险性越大。

In the process of rock cross - cut coal uncovering practice, in order to know the size of the possibility of coal and gas out- burst in each unit of coal uncovering region in advance, PFC software is used to carry out particle flow numerical simulation of coal seam to intuitively predict. Because the simulation process is unable to take into account the influence of gas pressure, the study makes the results can better reflect site actual situation based on the simulation results and the gas pressure weighted calculation processing. Through the simulation results after comprehensive treatment, based on the simulation results and weighted processing gas pressure, maximum possibility occurrence of coal and gas outburst in each unit of rock cross - cut coal uncovering coal region located around the roadway, the closer to the roadway, the greater of the risk of roadway is.