CAJ | 학술논문

为便于采用板的经典理论对岩层初次垮断进行分析，采用理论分析与现场实测相结合的方法，探讨了连续线性载荷形式作用下，顶板简支与固支边界时的初次垮断步距计算方法。研究得到，顶板破断危险点位置弯矩随顶板两向长度比值变化的关系，给出顶板两向长度任意比值条件下的顶板最大弯矩表达式；得到了倾斜顶板梯形载荷作用下，简支与固支顶板的最大应力分布表达式；提出了一种基于板结构理论的顶板初次垮断步距简便计算方法。通过对淮北矿区桃源煤矿8281工作面顶板初次破断的现场实测与理论分析对比，顶板初次垮断步距实测数据(25~34 m)与理论计算结果(26.5~35.5 m)基本一致，表明该算法对顶板岩层初次垮断步距的预测具有良好的适用性。
위편우채용판적경전이론대암층초차과단진행분석，채용이론분석여현장실측상결합적방법，탐토료련속선성재하형식작용하，정판간지여고지변계시적초차과단보거계산방법。연구득도，정판파단위험점위치만구수정판량향장도비치변화적관계，급출정판량향장도임의비치조건하적정판최대만구표체식；득도료경사정판제형재하작용하，간지여고지정판적최대응력분포표체식；제출료일충기우판결구이론적정판초차과단보거간편계산방법。통과대회북광구도원매광8281공작면정판초차파단적현장실측여이론분석대비，정판초차과단보거실측수거(25~34 m)여이론계산결과(26.5~35.5 m)기본일치，표명해산법대정판암층초차과단보거적예측구유량호적괄용성。
To analyze the roof first caving span based on the plate structure theory, considering the roof strata are loaded by continuous linear action, the roof first caving spans in the simply supported and clamped boundaries were investigated respectively by using the theoretical analysis and field measure-ment. In this paper, the relationship between the bending moment in the rupture peril point of roof and ratio of roof length in the two directions (strike and inclined directions) were obtained, and the largest bending moment expression under the random length ratio of the two directions were provided. Mean-while, the largest stress distribution expressions in the simply supported and clamped roof boundaries were obtained when considering the trapezoidal loading of the inclined roof. Moreover, a simple calcu-lation method for roof first caving span based on the plate structure theory was proposed. According to the contrast results between the field measurement and theoretical analysis of the roof first caving span in 8281 coal face in Taoyuan mine, Huaibei mining area, the measured first caving spans which are ranging 25~34 m basically match the theoretical calculation results (26.5~35.5 m), which indicates that the calculation method has good adaptability for the roof first caving span forecasting.