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利用FLAC3D软件分析了水平分段开采工作面围岩应力及裂隙发育规律,旨在为后期瓦斯治理提供理论基础。研究表明:在煤层顶板出现明显卸压,卸压区类似“O”形分布,但倾向应力并不对称,呈现上部卸压,下部应力集中;开采后,下部煤体卸压明显,其卸压深度不等;下部煤体垂深15 m范围内,离层裂隙发育;顶板10 m左右的高度,竖直裂隙发育。
The FLAC3D software was used to analyze the stress and fracture development of surrounding rock in horizontal section mining work, aiming to provide the theoretical basis for later gas treatment. The results show that there is obvious pressure relief in the roof of coal seam, and the pressure relief zone is similar to the “O” shape distribution, but the stress is not symmetrical, showing the pressure relief in the upper part and the stress concentration in the lower part. Depth of pressure relief varies; within 15 m of the lower part of the coal body in the vertical direction, the fissures in the fissures develop; the height of the roof is about 10 m and the vertical fissures develop.