This paper focuses on improving the blasting effect of the drilling and blasting method in the deep rock mass and solves the problems of blasthole collapse and misfire accident in the process of drilling and blasting construction of heading face. FEM software, ABAQUS, is used to simulate the stress distribution around the blasthole by extending a certain depth in the vertical direction of the shaft heading face. The sensitivity of different depths, different heading face sizes, and different lithologies on the horizontal stress distribution is analyzed by using a six-factor four-level orthogonal analysis method. The results show that the change of the radius of the heading face has the most considerable influence on the distance of the distressed zone and the stress concentration zone, followed by the lithology and the excavation depth. Also, the excavation depth has the most significant influence on the peak stress value. Through the industrial field experiment, the in situ stress of the shaft heading face is tested, and the numerical simulation results are consistent with the field monitoring results. The results reveal the law of stress distribution near the heading face, which can provide some reference for the design of blasthole depth in the drilling and blasting construction scheme.

中文翻译：

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井筒掘进面应力场中岩石力学参数的正交分析与数值模拟

本文着眼于提高深部岩体中钻孔爆破方法的爆破效果，解决了掘进工作面钻孔爆破施工中爆破塌方和失火事故的问题。FEM软件ABAQUS用于通过沿竖井掘进面的垂直方向延伸一定深度来模拟爆破孔周围的应力分布。采用六因素四水平正交分析法，分析了不同深度，不同掘进面尺寸，不同岩性对水平应力分布的敏感性。结果表明，掘进面半径的变化对遇险区和应力集中区的距离影响最大，其次为岩性和开挖深度。也，开挖深度对峰值应力值影响最大。通过工业现场试验，对竖井掘进面的现场应力进行了测试，数值模拟结果与现场监测结果吻合。研究结果揭示了掘进面附近的应力分布规律，可为钻爆施工方案中的爆破深度设计提供参考。