Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application

The invention discloses a support principle which is suitable for coal mine gob-side entry retaining segment bearing roadside support and an application method. After a working surface begins to be exploited, a transport road adopts gob-side entry retaining which is completely preserved to be used as a return airway for the next working surface. According to characteristics of stratum movement, the segment bearing principle is put forward to carry out the roadside unequal strength support. The roadside unequal strength support is that bearing-deformation of a roadside support material carriesout support of different strengths according to the segment movement intensity of the stratum in order to adapt to movement characteristics in different phases, namely different stratum movement phases, and correspondingly, the roadside support material has different mechanical properties and bearing-deformation parameters. Roadway support of the transport road is combined support by upper-layer padding and lower-layer pa