The maintained roadway by applying gob-side entry retaining technique will undergo the impact of excavation and two-time intensive mining. In order to insure to apply gob-side entry retaining technique successfully

some factors that include the supporting design and construction during excavating

the selection of roadside supporting way during retaining the roadway and the reinforced supporting method during actual mining of next working face should been systematically taken into account for the roadway which needs retaining. So the gob-side entry retaining technique is a systems engineering. According to this point

a test of gob-side entry retaining technique has been practised in transportation roadways of No. Ⅲ3215 working face in Daihe Coal Mine

Huaibei Mining Group Corporation. It is used bolt-mesh-cable support in the roadway

dense I-steel pillar and gangue or broken coal wall support roadside. The ground pressure behavior regularity of retaining roadway were obtained based on the ground pressure observation. Industrial test and application practice show that the good tech-economic effect has been achieved.