针对坚硬顶板大采高工作面顶板控制困难的问题,研究了工作面矿压显现规律。通过现场调研、力学分析建立了工作面上方坚硬顶板的“悬臂梁-砌体梁”结构的简化模型。力学分析表明工作面矿压显现主要受悬臂梁的影响,高位砌体梁对回采空间矿压显现影响不大。通过材料力学的计算原理得到晋城泉头煤矿15301工作面初次来压步距为47．76m,周期来压步距为19．43m。通过数值模拟得到工作面初次来压步距约为42．35m,周期来压步距约为17．28m,矿压实测周期来压步距平均16．19m。结果表明：理论计算和数值模拟结果与矿压实测周期来压步距接近,力学模型可以解释该矿顶板破断规律。%In order to solve the difficult problem of hard roof control in large-mining-height mining face, a simplified “cantilever beam-voussoir beam” structure model of hard roof was set up with mechanics theory. Mechanics analysis showed that underground pres-sure behavior was mainly influenced by cantilever beam. Based on material mechanics, the first roof weighting pace of 15301 mining face was obtained to be 47. 76m, and periodical weighting pace was about 19. 43m. Through the numerical simulation, the first roof weighting pace of the mining face was about 42. 35m, and periodical weighting pace was about 17. 28m, periodical weighting pace of measurement was 16. 19m. Theoretical calculation and numerical simulation results were near observation data which showed that the mechanics model could explain roof breakage rule of the mine.
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