【摘要】 为了矿井的可持续发展,探索在厚煤层放顶煤条件下上行开采技术的可行性。针对济宁三号煤矿4采区地质条件,综合运用数值计算、理论分析、实测统计分析以及工业性试验等方法,研究了该采空区覆岩破坏分带发育特征,探讨了在放顶煤条件下进行上行开采技术的可行性,较全面地分析和解决了济宁三号煤矿厚煤层放顶煤条件下的上行开采问题。研究结果表明:理论计算和现场实测垮落带高度基本一致,分别为14.5~19.15 m,18.6~21.7 m。数值模拟分析表明3煤处于3下煤开采后的裂隙带内,但煤层连续性保持完好。更多还原

【Abstract】 The paper discovered the feasibility of the upward mining technology to the top coal caving mining condition in thick seam for the mine sustainable development.According to the geological conditions of the No.4 mining block in No.3 Jining Coal Mine,with the numerical calculation,theoretical analysis,site measured statistical analysis and industrial trial,the paper had a research on the development features of the failed sub-zone in the strata above the goaf and discussed the feasibility of the upward mining technology under the top coal caving conditions.The paper fully analyzed and solved the upward mining problem under the top coal caving in the thick seam of No.3 Jining Coal Mine.The research results showed that the height of the falling zone from the theoretical calculation and the site measurement ware basically the same and were 14.5～19.15 m and 18.6～21.7 m individually.The numerical simulation analysis showed that the fissure zone at the No.3B seam was within the fissure zone after the coal mining operation of the No.3 seam and the continuity of the seam was well kept.更多还原