巷道底板冲击地压诱发机理及影响因素

对巷道底板冲击地压诱发机理分析表明，水平应力是诱发底板冲击地压的最主要因素，并确定底板水平应力的计算方法。在对巷道底板岩层梁结构屈曲破断力学分析的基础上，建立了底板冲击地压诱发的判定准则。巷道有效宽度和底板岩层的分层厚度对底板岩层屈曲破断所需水平应力的影响较大，计算出最大水平应力作用下底板关键层以上各岩层屈曲破断的最大分层厚度。研究结果表明，巷道底板岩层层状特征较为明显且岩层分层厚度较小的区域易诱发底板冲击地压。

Mechanism and Influencing Factors of Induced Roadway Floor Burst

By analyzing the inducing mechanism of floor burst, this paper concluded the horizontal stress has become the primary factor and ascertained the methodology of calculating the floor horizontal stress. On the basis of yielding-rupture of floor strata beams, the criteria for measuring the floor burst has been induced or not is attained. Roadway effective width and the width of laminated floor strata have dramatic effects on the horizontal stress which results in the floor strata yielding-rupture. The maximum laminated thickness has been obtained from the stratified strata which overlie the floor key strata under the influence of the maximum horizontal stress. The study has illustrated that the laminated characteristics of floor strata are apparent. The burst is prone to take place at where the laminated strata thickness is relatively small.