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以兴旺煤矿为研究背景,采用FLAC3D数值模拟与现场监测的方法,对其房柱式开采最佳合理采留参数的确定进行研究。结果表明,在该矿地质条件下及保证较大资源采出率的前提下,该矿采留比取8 m×8 m(采8留8)最为合适。且通过后期监测表明煤柱稳定性较好,煤层整体产生沉降,但沉降量小,整体连续性较好。
Taking prosperous coal mine as the research background, the FLAC3D numerical simulation and on-site monitoring method were used to study the determination of the best reasonable parameters for retaining and extracting in the chamber-column mining. The results show that under the conditions of the mine geological conditions and to ensure the recovery rate of large resources, the ore reserve ratio of 8 m × 8 m (mining 8 to 8) is the most appropriate. And through the post-monitoring shows that the stability of coal pillars better, the whole coal seam to produce settlement, but the settlement is small, the overall continuity is better.