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以煤矿常见岩石的耐久性试验为基础,采用理论与数值模拟分析相结合的方法,研究了岩石风化对煤矿巷道稳定性的影响。风化后围岩的主要变化趋势为岩石自身性质劣化导致巷道变形增加、塑性区扩大、周边应力降低且该趋势随风化程度的增加而加速变化。不同断面下风化对矩形断面影响最大,相同断面下埋深越大则影响越大;对于不同分层岩体,其风化前后受力与变形存在较大差异。
Based on the durability test of common rock in coal mine, the influence of rock weathering on the stability of coal mine roadway was studied by the combination of theory and numerical simulation. The main trend of the surrounding rock after weathering is the deterioration of the rock itself, leading to the increase of the deformation of the roadway, the expansion of the plastic zone and the decrease of the surrounding stress, and the trend accelerates with the increase of weathering degree. Weathering under different sections has the greatest influence on the rectangular section, and the greater the buried depth under the same section, the greater the impact. For different layered rock masses, the stress and deformation before and after weathering are quite different.