【摘要】 为了判断深部开采煤巷复合顶板离层稳定性,分析了层间离层和塑性变形随时间不同特点以及多点位移计测得的深部开采煤巷复合顶板离层随时间变化信号特征。结果表明:反映塑性变形随时间衰减快慢系数一般大于0.04,大小为10 cm量级,25 d后变形达到稳定;反映层间离层速度随时间变化快慢系数一般为0.01左右,大小为cm量级;多点位移计工程实测值包括塑性变形和层间离层,可以对工程实测的复合顶板初期(0～25 d)离层随时间变化进行回归分析估算塑性变形大小,用工程实测值和塑性变形差值表示层间离层大小。最后对工程实测新集一矿1606煤巷复合顶板离层进行分析,从工程实测中分离出层间离层,为复合顶板离层稳定分析提供依据。更多还原

【Abstract】 In order to determine the stability of the complex roofs in deep coal mine tunnels,the time-varying signals of complex roof separation obtained by the multipoint displacement meter and the varying relation between interlayer separation and plastic deformation were analyzed.The results show that the attenuation coefficient of plastic deformation is great than 0.04 and the coefficient that denote the interlayer separation speed is about 0.01;the total plastic deformation is 10 cm and the interlayer separation is around 1 cm;the plastic deformation was evaluated by tests in the early period and the interlayer separation was determined by the difference between the test value and the plastic deformation.Based on the signals of total separation of the complex roof in the 1606 coal tunnel,the interlayer separation is obtained,providing a basis for stability analysis of complex roof separation.更多还原