Combining theoretical analysis

practice and actual measurement

a retaining roadway for the next sublevel technological theory of end zone below steep inclined coal seam and systematical technology were discussed; the influencing factors of the forces posed on the filling object were obtained

and a filling technique that applies to steep inclined coal seam was brought forward. The research shows that loading capacity of roadside packing adjacent to steep inclined coal seam is affected mainly by the effective length of the gob gangue

inclination angle of coal seam

designed width of filled architecture

and the thickness of coal seam

whereas it is less affected by installed anchor of roof and floor. The deformation rule of bearing gangue reveals stage characteristics under the uniaxial compress

and the stress retain a nearly linear relationship with strain during every stage. The bearing capacity and deformation of backfilling matter are notably dependent on working distance

displaying different characterizations as follows: the closer the backfilling matter is to the work face

the smaller the deformation rate of backfilling matter is. The field practice in Xinqiang coal of Qitaihe city demonstrates that

the concrete filling process system of gangue in sharply steep coal seam can be expediently carried out and conveniently operated

and the overall effect of gob is obvious.