大倾角极近距离煤层群开采过程中，巷道受多重采动影响，支护维护困难。针对此类问题，以代池坝煤矿大倾角极近距离煤层群重复采动巷道31233运输巷为工程背景，主要采用数值模拟和现场试验研究方法，研究了巷道围岩应力环境演化特征及其作用下巷道围岩破坏规律，设计了有利于围岩塑性破坏分布收敛的非对称屋顶断面，提出了基于巷道围岩塑性区分布规律的非均匀锚杆（索）支护设计方法。研究结果表明：大倾角极近距离煤层群重复采动影响条件下，巷道周边双向主应力差值较大且方向偏转，导致巷道围岩周边破坏呈现非均匀、局部湮灭、最大破坏深度偏转等蝶形特征，巷道内错位置和断面形状决定了巷道破坏形态和范围，内错距直接影响了其围岩塑性区分布与扩展的程度，而坚硬岩层的存在造成塑性区局部湮灭。当巷道内错距离大于17 m时，巷道周边应力趋于稳定，其围岩塑性区大小与形态无明显变化，内错位置大于该距离时，对巷道的围岩稳定性最有利。巷道断面的单边跨度尺寸决定了其所在侧的塑性破坏深度，当巷道断面为非对称屋顶断面时，围岩塑性分布收敛程度显著。巷道断面设计时，巷道最长边应位于坚硬岩层侧且尽量避开最大破坏深度方向，以便充分利用坚硬岩层塑性区湮灭特性，避免巷道围岩塑性区蝶叶过度扩展。因此，可充分利用大倾角非对称屋顶形巷道断面的几何特征，基于巷道围岩塑性区分布规律与合理锚固层位分布特征，进行非均匀锚杆（索）支护设计，有效保障锚杆（索）支护力的发挥的同时，保障巷道围岩的整体稳定。同时，在31233运输巷进行了试验，布设了巷道顶板深部位移与锚索支护力监测站，监测期间顶板变形量在100 mm以内，锚索支护力发挥稳定，围岩整体控制效果较好。

During the process of mining of the steep and ultra-close multiple coal seam groups, the roadway is affected by multiple mining, the regional stress environment is complex, the deformation and failure of the roadway is severe and the non-uniform characteristics are significant, and the support and maintenance are difficult. For such problems, taking the repeated mining roadway of the and ultra-close multiple steep coal seam 31233 transportation lane of Daichiba as the engineering background, the comprehensive research methods such as theoretical analysis, numerical simulation and field experiment are adopted to find out the evolution characteristics of surrounding rock stress environment at different locations of the roadway and the dis-similatory failure law of roadway surrounding rock under its influence, the special-shaped section which is beneficial to the convergence of plastic failure distribution of surrounding rock is designed, and the design method of non-uniform bolt ( cable ) support based on the alienation distribution law of plastic zone of roadway surrounding rock is proposed. The results show that under the influence of repeated mining of the steep and ultra-close multiple coal seam, the bidirectional principal stress around the roadway has a large difference, and the direction of the principal stress is deflected accordingly, resulting in the butterfly-shaped alienation characteristics of the surrounding rock of the roadway, such as non-uniformity and deflection of the maximum failure depth. The stagger position and cross-section shape of the roadway determine the failure form and scope of the roadway, and the stagger distancet directly affects the dissimilation distribution and scope of the plastic zone of the surrounding rock, and the existence of hard rock causes local annihilation of the plastic zone. When the position of the roadway is staggered to more than 17 m, the stress environment around the roadway tends to be stable, and there is no obvious change in the plastic size and shape of its surrounding rock. The internal dislocation position is greater than the distance, which is most favorable for the stability of the surrounding rock of the roadway. The unilateral span size of the roadway section determines the depth of plastic failure on its side. When the roadway section is a polygonal special-shaped section, the convergence degree of plastic distribution of surrounding rock is significant. In the design of roadway section, the longest side of roadway should be located on the side of hard rock stratum and try to avoid the direction of maximum failure depth, so as to make full use of the annihilation characteristics of plastic zone of hard rock stratum and avoid the excessive expansion of butterfly leaves in plastic zone of roadway surrounding rock. Therefore, the geometric characteristics of the section of the special-shaped roadway with the condition of steep coal seam can be fully utilized. Based on the dissimilation distribution law of the plastic zone of the surrounding rock of the roadway and the distribution characteristics of the reasonable anchorage layer, the non-uniform bolt (anchor cable ) support design can be carried out, which can effectively guarantee the support force of the bolt (anchor cable ) and ensure the overall stability of the surrounding rock of the roadway. At the same time, the industrial test was carried out in 31233 headentry. Before the influence of severe mining, the monitoring station of deep displacement of roadway roof and anchor cable support force was set up. During the monitoring period, the total deformation of roof deformation was controlled within 100 mm, the anchor cable support force was stable, and the overall control effect of surrounding rock was better.