基于区间数关联决策的工作面升压区间优化

发布时间：2018-03-24 23:25

本文选题：升压区间　切入点：双层采空区　出处：《中国安全生产科学技术》2017年01期

【摘要】：为确定新老采空区共存时本工作面的最优升压区间,提高升压效率,根据双层采空区气体涌出及自燃数值模拟结果,采用多指标区间数关联决策模型对合理升压区间进行评价和优化,以本工作面瓦斯、CO浓度与涌出量和上下覆之间等压面与进风口距离、上覆老采空区氧化带宽度和最高温度7个变量为评价指标,开展7种指标区间数关联决策研究。结果显示,现有风压基础上升压70~80 Pa即本工作面回风口风压高于上覆20~30 Pa为综合最优升压区间。现场升压结果显示,本工作面回风口风压高于上覆老空区20~30 Pa时,瓦斯、CO浓度基本未超限且上覆老采空区未发生自燃。
[Abstract]:In order to determine the optimal pressure raising interval and improve the pressure raising efficiency of this working face when the new and old goaf coexists, according to the numerical simulation results of gas emission and spontaneous combustion in the double-layer goaf, The multi-index interval number correlation decision model is used to evaluate and optimize the reasonable pressure rise interval, and the equal pressure surface and air inlet distance between the gas CO concentration and the emission quantity and the upper and lower overburden are used in this work face. Seven variables of oxidation zone width and maximum temperature in overlying old goaf are used as evaluation indexes. The research on the correlation decision of the interval number of seven indexes is carried out. The results show that, On the basis of the existing wind pressure, the upward pressure is 7080 Pa, that is, the wind pressure at the return tuyere of the working face is higher than that of the upper overburden 20g 30Pa is the comprehensive optimal pressure raising interval. The field pressure rising result shows that when the air pressure at the back tuyere of the working face is higher than 2030 Pa in the overlying old goaf area, The CO concentration of gas is not over the limit and no spontaneous combustion occurs in the overlying old goaf.
【作者单位】：湖南工学院安全与环境工程学院;
【基金】：国家自然科学基金项目(51274115,51274113)
【分类号】：TD712

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