【摘要】 巷道稳定是地下矿山安全生产的基础，量化爆破振动波对巷道稳定性的动态损伤效应对地下矿山具有重要意义。以某矿第一分段为研究对象，针对无底柱分段崩落法矿体回采过程中下盘联巷与进路相交处因矿体回采产生的爆破振动出现冒顶事故，利用FLAC3D动力分析模块开展了在爆破荷载作用下确定无底柱分段崩落法下盘联巷合理位置的研究。研究结果表明：该矿分段高度为15 m,综合巷道质点的振动速度、位移以及应力三方面响应，得出下盘联巷距退采位置的安全距离为12 m。工程实践表明，研究得出的安全距离与矿山现场下盘联巷合理的安全距离绝对偏差仅0.7 m(<6%),可为矿山类似问题的解决提供解决思路和技术支撑。更多还原

【Abstract】 Roadway stability is the foundation of safe production in underground mines, and it is of great significance to study the dynamic damage effects of blasting vibration wave on roadway stability in underground mines. Taking the first subsection of a mine as the research object, aiming at the roof fall accident caused by the blasting vibration at the intersection of the footwall roadway and the approach due to the mining of the ore body during the mining process of the ore body of the non-pillar sublevel caving method, the FLAC3D dynamic analysis module was used to determine the reasonable position of the footwall roadway of the non-pillar sublevel caving method under the blasting load. The results show that the height of the section of the mine is 15 m, considering the vibration velocity, displacement and stress response of the roadway particles, the safe distance between the footwall connection roadway and the withdrawal position is 12 m. The engineering practice shows that the safety distance obtained by the study is obsolute deviation of only 0.7 m(<6%) with the reasonable safety distance of the footwall connection roadway in the mine site, which can provide solutions and technical support for the solution of similar problems in the mines.更多还原