摘要
放顶煤工作面前方煤体瓦斯运移主要是沿煤层层面向已采空间的渗流,在综放工作面循环向前推进时,煤体瓦斯渗流场结构发生变化。为进一步探索综放工作面前方煤体瓦斯压力的分布变化规律,有效地进行瓦斯综合治理,运用ANSYS10.0的瞬态分析模块进行了综放工作面附近煤体瓦斯压力模拟分析。研究表明,综放工作面在推进过程中前方应力降低区瓦斯压力变化梯度大,在应力增高区瓦斯压力较高,压力梯度变化小;初放期在工作面前方附近首轮循环放顶煤形成的瓦斯压力梯度比第2轮循环形成的瓦斯压力梯度大。
The gas migration in coal body in front of the fully mechanized caving face mainly seepages along the coal seam surface to the mined-out space.When a fully mechanized caving face is cyclically advanced forward,the structure of the seepage field of coal body gas changed.Simulation analysis was made on the gas pressure near the fully mechanized caving face by using ANSYS10.0 transient analysis module in order to further probe into the variation regularity of gas pressure distribution in the coal body in front of the fully mechanized caving face and effectively control the gas.Study indicated that the varying gradient of gas pressure in the stress-lowering zone in front of the fully mechanized caving face is large,but in the stress-increasing zone,the gas pressure is relatively high and the varying gradient of gas pressure is small;the gradient of gas pressure formed in the first coal-caving cycle in front of the face is larger than that in the second coal-caving cycle.
出处
《矿业安全与环保》
北大核心
2009年第1期4-6,共3页
Mining Safety & Environmental Protection
基金
国家重点基础研究发展计划(973计划)项目(2005CB221504)
