为了解决综采工作面在自动化生产模式下推进数刀后逐渐不直，继而影响连续推进的问题，通过分析问题产生的原因及其对自动化开采的影响，提出采用惯性导航技术测量刮板输送机平直度来定量描述工作面直线度的方法，将惯性导航装置捷联于采煤机，实时测量采煤机割煤行走时形成的三维空间轨迹。介绍基于该方法的惯性导航LASC技术的技术原理、算法框架、关键公式、控制流程等，并基于该技术开发了工作面自动找直控制系统。地面联调和井下工业试验的结果表明，此系统对工作面直线度的检测误差小于100mm，全工作面直线度控制误差小于300mm，满足了自动化开采模式下综采工作面自动连续推进的要求。

In order to solve the problem that automated fully-mechanized working face is no longer straight after several rounds of cutting coal,the causes of the alignment problem and its influence on automation production are analyzed.The longwall face straightness measuring method based on inertial navigation is proposed.With the inertial navigation device installed in the shearer,it’s 3D trajectory is recorded when it goes back and forth on the scraper conveyer.Principle,algorithm,formula,process of LASC technology are introduced.Based on LASC the working face automatic alignment control system is developed.Verified by both mini-build test on surface and industrial field trial underground,the working face straightness detection error by this system can be less than 100 mm.The whole working face alignment error can be less than 300 mm.It meets the requirement of automatically and continuously retreating fully-machanized working face.