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zong fang kai cai chu fang qi fang mei kou fu jin mei ti wa si ya li ji nei neng fen xi
Author(s): 
Pages: 8-10+15
Year: Issue:  4
Journal: Safety in Coal Mines

Keyword:  fully mechanized caving facetop coal cavinggas pressureinitial cavingintrinsic gas energy;
Abstract: 放顶煤开采顶煤初次垮落是一个复杂的动力过程,在综放面循环向前推进时,煤体瓦斯渗流场结构发生变化。为探索综放面前方煤体瓦斯压力的分布变化规律,进一步对瓦斯内能进行分析,研究初放期煤岩发生动力灾害的可能性,有效的进行瓦斯综合治理,本文运用AN-SYS10.0的瞬态分析模块对综放面采场附近瓦斯压力进行了模拟分析。研究表明,综放面在推进过程中前方卸压区瓦斯压力变化梯度大,在应力集中区瓦斯压力较高,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二轮循环形成的瓦斯压力梯度大;瓦斯膨胀做功有利于突出的发生。
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