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针对陕西彬长矿区某矿202工作面运顺埋深大,地应力高和断面大的特点,基于强支护设计原则完成了锚网支护方案设计,通过FLAC数值模拟对支护方案的合理性进行了评价。现场监测表明:运输顺槽开挖后,浅表围岩以较快的速度发生变形,同时锚杆开始受力。伴随巷道掘进扰动,围岩变形向深部发展,锚索受力增加,当距掘进工作面迎头超过30 m后,围岩变形较小,基本趋于稳定。结果表明,深埋厚煤层综放面运顺支护方案的设计合理可行。
In view of the characteristics of 202 face of a mine in Binchang Mining Area, Shaanxi Province, which is deeply transported and buried deeply, with high ground stress and large cross section, the design of bolting network support scheme is completed based on the principle of strong support design. The FLAC numerical simulation is reasonable for the support scheme Sex was evaluated. The on-site monitoring shows that after the excavation along the transportation channel, the shallow surrounding rock deforms at a faster speed and the anchor rod begins to be forced. With the disturbance of roadway excavation, the deformation of the surrounding rock develops to the deep and the force of the anchor cable increases. When the heading head exceeds 30 m, the deformation of surrounding rock is small and basically stable. The results show that the design of Yunshun supporting scheme in fully mechanized top coal caving face with deep thick coal is reasonable and feasible.