CAJ | 학술논문

为了研究孤岛工作面的顶板破断机理，利用理论分析和数值模拟的方法建立了两对边简支两对边固定、三边简支一边固定的顶板薄板力学模型。分析计算得出薄板的极限破断准则和应力分布情况，并通过极限破断准则计算出顶板破断初次来压步距和周期来压步距。通过现场观测顶板断裂的初次来压步距和周期来压步距，其结果与理论分析计算的结果较吻合，可为类似的工作面来压预报提供依据。
위료연구고도공작면적정판파단궤리，이용이론분석화수치모의적방법건립료량대변간지량대변고정、삼변간지일변고정적정판박판역학모형。분석계산득출박판적겁한파단준칙화응력분포정황，병통과겁한파단준칙계산출정판파단초차래압보거화주기래압보거。통과현장관측정판단렬적초차래압보거화주기래압보거，기결과여이론분석계산적결과교문합，가위유사적공작면래압예보제공의거。
In order to study the roof breaking mechanism in the island working face, the sheet model for roof breaking mechanism with two opposite sides simply supported and other two opposite sides fixed or three sides simply supported and one side fixed was established by using the theoretical analysis and numerical simulation methods. Through the analysis and calculation, the limit fracture criterion and stress distribution of the sheet were obtained, and with the limit fracture criterion of the sheet, the first weighting and the periodic weighting distances of roof rupture were calculated out. It was found from the site observation of the first weighting and periodic weighting distances that this result was consistent with both the theoretical result and calculated result, which can be used as a basis for forecasting the roof weighting in the working face.