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杨村煤矿下组煤的开采受到底板承压水的威胁,采动底板破坏深度的研究是底板岩层阻水能力评价的关键。以杨村煤矿4602工作面水文地质条件为基础,建立了下组薄煤层底板工程地质模型,通过数值模拟软件FLAC3D模拟研究煤层底板采动变形破坏规律,得出在正常采动情况下底板最大破坏深度约为12 m;并与该工作面底板实测结果进行了对比验证,二者结果基本一致。研究结果为杨村煤矿下组煤的合理开采、支护及底板岩层阻水性的评价提供了参考依据。
The mining of the lower group of coal in Yangcun Coal Mine is threatened by the pressurized water of the floor and the study of the depth of failure of the mining floor is the key to evaluate the water blocking capacity of the floor rock. Based on the hydrogeological condition of 4602 working face in Yangcun Coal Mine, a set of engineering geological models of the thin seam floor is established, and the deformation and failure of mining floor are studied by numerical simulation software FLAC3D. The maximum failure of floor under normal mining condition Depth of about 12 m; and compared with the actual test results of the working face floor, the two results are basically the same. The results provide a reference for the reasonable exploitation of coal in the lower group of Yangcun coal mine, the support and the evaluation of the water blocking property of the floor rock.