下沟煤矿自2001年技改以来，积极推行煤巷锚杆支护技术，100%实现了锚网支护，经过十几年的技术积累，已经能熟练掌握一般条件下的巷道锚杆支护技术。但是随着开采深度和开采强度的加大，出现了孤岛工作面、与回采面对穿巷道和复用巷道等复杂困难巷道，原有技术难以维护这些复杂困难巷道，巷道出现了局部变形以及漏顶的现象，对矿工的生命安全形成了较大的威胁，严重影响安全生产。综合以上情况分析，为保障矿井安全顺利生产，本研究将对原有下沟矿煤层巷道锚杆支护方案进行分析，并找到合理支护方案。 本次研究在理论分析的基础上，结合下沟矿地质条件和ZF4404工作面的现状，进行了大量的现场试验，掌握了煤层巷道围岩的相关力学参数和矿压分布规律的特征，确定了高预应力强力支护的相关支护参数，依靠Flac3d数值模拟软件，对锚杆支护方案的巷道围岩的塑性区与应力分布和竖直方向上的巷道位移状态做了模拟分析。结合现场的施工、监测和详细的技术经济分析，以此确定高预应力锚杆支护技术适应下沟矿的巷道条件，验证了本次锚杆支护方案的安全性。

The ditch coal mine since 2001 technological upgrading, and actively implement the coal roadway bolting technology, 100% implementation of the anchor net support, after more than ten years of technology accumulation, has been skillfully mastered the technology of roadway under bolt support general conditions. But with the increase of mining depth and intensity of exploitation, the emergence of isolated working face, mining face and roadway wear and reuse complex difficult tunnel, the original technology is difficult to maintain these difficult roadway, roadway appeared in the local deformation and roof caving roof leakage phenomenon, has formed a big threat to the mine workers' safety, seriously affect the safe production. Based on the above analysis, in order to guarantee the smooth production of mine safety, under this study will be the original mine seam roadway bolting scheme is analyzed, and find the reasonable supporting scheme. On the basis of theoretical analysis, combined with the Xiagou mine geological conditions and present situation of ZF4404 working face, a large number of field tests, grasp the characteristics of relevant mechanical parameters of surrounding rock in coal seam roadway and mining pressure distribution, determined the strength prestressed supporting relevant supporting parameters, rely on the Flac3d numerical simulation software the bolt supporting of roadway surrounding rock, the supporting scheme of plastic zone and stress state of roadway displacement force distribution and the vertical direction did simulation analysis. Combining the analysis of construction site, monitoring and detailed technical and economic, in order to determine the high prestress technology of bolt support in roadway conditions to adapt to ditch mine, verify the safety of the bolt support scheme.