Research on mine pressure control technology of end- mining in large mining height fully- mechanized mining face

According to the problem of support crushing accidents at the ending stage of fully- mechanized face in Shendong mining area,strata behavior regularity and overburden strata movement and theoretical calculation are adopted to study the principle and the application of stopping mining and speed control for yield,forced caving for reducing pressure,and adjusting mining height for Buffer Depressurization.Results show that under the premise of adjusting mining height,speed control and forced caving can achieve the pressure coming from the fixed point and position and the surrounding rock depressurizing in advance,no matter the above-mentioned single method or comprehensive methods are taken.It can ensure that the roof pressure of the well does not retreat.It can guide the roof control at the ending stage of the NO.22202 fully- mechanized face in Huoluowan coal mine mining well,which can realize the safe and the efficient production and removing,and provide references for the similar conditions at the ending stage.