中文摘要：

按传统方法设计的锚索在深井厚层软弱顶板煤巷中经常发生大面积支护失效，致使这类巷道维护十分困难，成本高。通过现场勘查与理论分析，研究了导致锚索支护失效的影响因素，指出软弱厚层直接顶板锚索孔施工过程中的变形和安装过程对锚固剂的破坏是导致锚索支护失效的主要原因。提出了基于厚层软弱直接顶的新的锚索参数设计方法。现场实践表明，按新方法设计的锚索不仅缩短了锚索长度，而且大幅度提高了锚固力，显著改善了巷道的维护效果。

英文摘要：

With the traditional method, large-area supporting failure often arises in anchor cable which causes the result that the maintenance of roadway is very difficult and the cost is high in thick soft-weak roof of deep coal roadway. Through field investigation and theoretical analysis, the factors of anchor cable supporting failure have been studied. The study indicates that the main reasons of anchor cable supporting failure are deformation of cable holes during constructive process in thick soft immediate roof and anchor agent damage during installation. Accordingly, the new design method of anchor cable parameters applying to thick soft immediate roof is proposed. The results show that the length of anchor cable in accordance with the new method is shortened and the anchoring force is improved greatly, and therefore the maintenance of roadway is improved significantly.