福胜煤矿高位钻孔抽采瓦斯参数优化数值模拟研究

Numerical Simulation Research on Parameter Optimization of Gas Drainage by High- level Boreholes in Fusheng Mine

研究覆岩裂隙及离层的分布状态,是掌握采空区瓦斯流动规律并最终进行采空区瓦斯抽放的前提。以实验室岩体力学的测试结果为基础,结合福胜煤矿1201综采工作面地质与开采条件,采用ANSYS软件,构建采场弹塑性模型,研究了采场围岩应力、采动裂隙场分布规律,以及围岩破断空间分布特征,模拟出1201工作面的"三区"及"三带"分布情况,并对1201综采工作面顶板高位钻孔的布孔方式及参数进行了优化,可取得较好的瓦斯抽采效果。

Studying the distribution state of cracks and bed separations of the overburden strata is a pr-requisite to master the gas flow rule in the gob and finally carry out gas drainage from the gob. In this paper, based on the test results of rock mechanics in the laboratory, combining with the geologic and mining conditions in No. 1201 fully mechanized working face in Fusheng Mine and using ANSYS software, an elastic-plastic stope model was established, research was made on the distribution regularity of the stope surrounding rock stress and the mining crack field as well as the distribution characteristics of the surrounding rock＇ s fracturing space, the distribution of the ＂three-area＂ and ＂three-zone＂ in No. 1201 working face was simulated, the arrangement and parameters of high-level boreholes in the roof of this face were optimized, so better gas drainage effect can thus be obtained.