CAJ | 학술논문

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。
침대견경정판대채고공작면정판공제곤난적문제,연구료공작면광압현현규률。통과현장조연、역학분석건립료공작면상방견경정판적“현비량-체체량”결구적간화모형。역학분석표명공작면광압현현주요수현비량적영향,고위체체량대회채공간광압현현영향불대。통과재료역학적계산원리득도진성천두매광15301공작면초차래압보거위47．76m,주기래압보거위19．43m。통과수치모의득도공작면초차래압보거약위42．35m,주기래압보거약위17．28m,광압실측주기래압보거평균16．19m。결과표명：이론계산화수치모의결과여광압실측주기래압보거접근,역학모형가이해석해광정판파단규률。
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.