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为了研究大采深、高应力煤层在开采扰动下冲击倾向性,结合某矿1304工作面具体开采条件,运用FLAC3D三维有限元数值模拟软件,模拟了大采深工作面在不同推进步距下采场周围及工作面前方应力、弹性应变能分布规律。分析结果得出,在工作面前方局部区域产生2.3倍于原岩应力的垂直应力,应力峰值出现在工作面前方10 m左右,而且随着推采步距的增大,应力集中系数也逐渐增大。
In order to study the impact propensity of high-stress and high-stress coal seam under mining disturbance, combined with the specific mining conditions of 1304 working face of a mine, the 3D finite element numerical simulation software FLAC3D was used to simulate the mining face with large mining depth Around the field and working face in front of stress, elastic strain energy distribution. The analysis results show that there are 2.3 times the vertical stress of the original rock stress in the local area ahead of the working face and the stress peak appears about 10 m in front of the working face. As the step distance increases, the stress concentration coefficient gradually increases Big.