大倾角“三软”特厚煤层综放开采技术国内外目前仍存在一些长期没有解决的难题，主要表现为以支架为主的开采装备在38°以上倾角条件下的下滑倾倒，底板破坏时可能也向下滑移，加剧了“支架—围岩”系统的不稳定性，冒落的大块顶煤和顶板向下滑滚、充填，增加了顶板活动的复杂性，而顶板的复杂运动必然对工作面的矿压显现和支架等装备的稳定性造成影响，运输及回风平巷超前支护范围受移动支承压力影响巷道收敛变形快，需反复扩修下底，巷道有效断面难以保持、液压支架及前后溜上窜下滑不易控制、工作面增补或抽减液压支架困难、综采设备生产影响频繁、运输巷端头支架区域因应力集中巷道变形移设困难等方面；以以上问题中部分技术难题为突破口，以王家山煤矿47407综放工作面为工程背景，基于大倾角“三软”特厚煤层水平-圆弧过渡综放开采技术，结合地质条件及工作面现状，采用理论分析和工程实践相结合的方法，经过长期实践探索，总结出了工作面圆弧段管理关键技术，创新将运输平巷沿顶板布置在煤层顶板岩层中，回风平巷相对上区段采空区内错布置、破2/3以上底板岩层，减少了上下出口及回采巷道频繁扩修；工作面下段采用“圆弧-水平”过渡布置，提出了基于圆弧段的工作面生产状态及长度控制和定量分析、基于圆弧段的采煤机驱动力及重力对前溜上窜下滑影响及定量分析、工作面上下口割帮（插帮）调整设备上窜下滑及定量分析、单向推溜（移架）调整设备上窜下滑分析计算、利用圆弧段调整工作面设备上窜下滑量分析估算等分析计算新方法，对基于圆弧段的工作面生产状态、长度控制及定量计算，工作面设备管控、生产状态及工程质量管控有关经验性新做法进行了简要分析叙述，截至目前采用该技术已回采了3个大倾角综放工作面，为“三软”地质条件下大倾角特厚煤层综放开采提供新方法。

At present, there are still some long-term unsolved problems in full-mechanized caving mining technology of "three soft" super thick coal seam with large dip Angle at home and abroad. The main performance is that the mining equipment dominated by support will slide and fall under the condition of Angle above 38°, and the floor may also slide downward when it is damaged, which aggravates the instability of the "support - surrounding rock" system, and the large falling top coal and roof will slide and fill. The complexity of roof movement is increased, and the complex movement of the roof will inevitably affect the ore pressure appearance of the working face and the stability of equipment such as support. The advance support range of transportation and return air roadway is affected by moving abatement pressure, and the roadway convergence and deformation are fast, so it is necessary to expand and repair the bottom repeatedly. It is difficult to maintain effective section of roadway, difficult to control hydraulic support and sliding up and down, difficult to add or remove hydraulic support of working face, frequent production impact of fully mechanized mining equipment, and difficult to shift the tunnel end support area due to stress concentration. Taking some of the technical difficulties in the above problems as a breakthrough, and taking the 47407 fully mechanized caving face of Wangjiashan Coal Mine as the engineering background, based on the horizontal and circular transition fully mechanized caving mining technology of "three soft" ultra-thick coal seam with large dip Angle, combined with geological conditions and the current situation of the working face, the method of combining theoretical analysis and engineering practice has been adopted through long-term practical exploration. The key technology of the management of the circular section of the working face is summarized. The transportation roadway is arranged in the roof of the coal seam, and the return air roadway is misarranged in the goaf of the upper section and more than 2/3 of the floor rock is broken, which reduces the frequent expansion and repair of the upper and lower exits and the mining roadway. The lower section of the working face adopts the "arc-horizontal" transition arrangement. The paper puts forward the control and quantitative analysis of the production state and length of the working face based on the arc segment, the influence of the driving force and gravity of the shearer on the sliding down of the front slide based on the arc segment, the sliding down of the equipment adjusting the upper and lower cutting wall (slop) of the working face, the analysis and calculation of the sliding down of the equipment adjusting the working face using the arc segment The new methods of analysis and calculation, such as quantity analysis and estimation, have briefly analyzed and described the new experiential methods of working face production status, length control and quantitative calculation, working face equipment control, production status and engineering quality control based on circular arc section. Up to now, three full-mechanized caving faces with large dip Angle have been mined by using this technology. It provides a new method for fully mechanized caving mining of large dip seam under "three soft" geological conditions.