TY -的A2 Annamdas维纳通用非盟-甄Enze AU -高,Yubing AU - Wang Yajun AU -王,斯明PY - 2019 DA - 2019/07/01 TI -比较研究两种类型的Nonpillar挖掘技术通过屋顶切割和充填人工材料SP - 5267240六世- 2019 AB - Gob-side条目保留是一种环境友好型Nonpillar矿业技术与高效和安全。的持续探索gob-side条目保留通过填写(GERF)与路边的支持,GERF使nonpillar矿业。然而,密集的路边支持或填充人造柱成为受顶板压力的压力而不是煤炭支柱,导致问题。最近,一个原始创新gob-side条目保留技术通过屋顶削减和减压(RCPR)中国煤炭生产开发和广泛实施。gob-side条目由不同的固定方法在地层表现出一些差异行为和保留道路的结果。本研究通过工业情况和数值模拟,探讨了影响入境保留条目保留的结果的方法。结果表明,围岩的总变形GERF更大更严重;屋顶和地板之间的融合,入口两侧位移是885毫米和216毫米,分别;保留条目附近的液压支架压力更大;和峰值为38.7 MPa。 The deformation of the surrounding rock by RCPR is relatively small; the convergence between the roof and the floor and the entry sides displacement is 351 mm and 166 mm, respectively; the hydraulic support pressure near the retained entry is weakened to a certain extent; the peak value is 32.2 MPa; and the peak pressure is reduced by 16.8% compared with the GERF. A numerical simulation analysis reveals the following findings: RCPR changes the surrounding rock structure of a gob-side entry, optimizes the surrounding rock stress environment, and belongs to active pressure-relief entry retaining; the GERF does not adjust the surrounding rock structure of a gob-side entry and belongs to passive pressure-resistance entry retaining; and the surrounding rock of a gob-side entry is significantly affected by pressure. These two methods of gob-side entry retaining have different effects on the surrounding rock of the entry retained. This study can contribute to an exploration of the strata behaviors and the results of a retained roadway by the GERF or RCPR method. SN - 1687-8086 UR - https://doi.org/10.1155/2019/5267240 DO - 10.1155/2019/5267240 JF - Advances in Civil Engineering PB - Hindawi KW - ER -