By industrical test at the test face in Ci Yaobao mine of Lingwu mining district, the recovery coefficient is up to 77.1 % and gets the expected effection.

• 通过在灵武矿区磁窑堡矿技改井综放试验面进行工业性试验；工作面回采率达到77.；1%25；取得了预期的效果。