9
beam of the support is 1.69 kN (corresponding to 0.86 MPa
in the field), and the total load is 15 kN (7.65 MPa). During
the loading process, the average load of the support sensor
gradually increases to 4.1 kN (2.09 MPa), and the total
load is up to 36.9 kN (18.83 MPa), and then the top beam
drops to 0 kN instantly, as shown in Figure 16(a). High-
definition monitoring shows that the top plate slides to the
inclined lower support area after breaking. The twin system
showed that the support tipped 3.4° in the tilt direction
and then quickly returned to normal, increasing the aver-
age sensor load to 1.5 kN (0.77 MPa). This is because the
support adopts the constant pressure support mode, which
can quickly carry out the lifting operation when the top
plate (bottom plate) is broken, increase the working resis-
tance, and avoid the instability of the support.
At 45° inclination Angle, when no load is applied to
the hydraulic support, the average load of the sensor on
the top beam of the support is 1.65 kN (0.84 MPa), and
the total load is 14.85 kN (7.58 MPa). During the load-
ing process, the average load of the support sensor gradu-
ally increased to 4.3 kN (2.19 MPa), the total load reached
38.7 kN (19.74 MPa), and then the total load of the top
beam dropped to 35.1 kN (17.90 MPa). The twin system
showed that the height yield of the hydraulic support col-
umn was 3.7 cm, as shown in Figure 16(b). When the total
load reached 38 kN (19.39 MPa), the roof broke, the high-
definition monitoring showed that the roof slipped to the
support area below the tilt, the twin system showed that
the support fell 4.2° in the tilt direction, and then quickly
returned to normal, and the average sensor load increased
to 1.7 kN (0.87 MPa).
At 55° inclination Angle, when no load is applied to
the hydraulic support, the average load of the sensor on
the top beam of the support is 1.39 kN (0.71 MPa), and
the total load is 12.51 kN (6.38 MPa). During the load-
ing process, the average load of the support sensor gradu-
ally increased to 4.4 kN (2.24 MPa), the total load reached
39.6 kN (20.20 MPa), and then the total load of the top
beam dropped to 36.4 kN (18.57 MPa). The twin system
showed that the height of the hydraulic support column
yielded 6.7 cm, and the pressure continued. When the
total load reached 36 kN (18.36 MPa), the roof broke, as
Figure 12. Inclination model of 35°
Figure 13. Inclination 45° model
Figure 14. Inclination 55° model
Figure 15. Inclination 65° model
Figure 16. Changes of loading brackets at different angles
beam of the support is 1.69 kN (corresponding to 0.86 MPa
in the field), and the total load is 15 kN (7.65 MPa). During
the loading process, the average load of the support sensor
gradually increases to 4.1 kN (2.09 MPa), and the total
load is up to 36.9 kN (18.83 MPa), and then the top beam
drops to 0 kN instantly, as shown in Figure 16(a). High-
definition monitoring shows that the top plate slides to the
inclined lower support area after breaking. The twin system
showed that the support tipped 3.4° in the tilt direction
and then quickly returned to normal, increasing the aver-
age sensor load to 1.5 kN (0.77 MPa). This is because the
support adopts the constant pressure support mode, which
can quickly carry out the lifting operation when the top
plate (bottom plate) is broken, increase the working resis-
tance, and avoid the instability of the support.
At 45° inclination Angle, when no load is applied to
the hydraulic support, the average load of the sensor on
the top beam of the support is 1.65 kN (0.84 MPa), and
the total load is 14.85 kN (7.58 MPa). During the load-
ing process, the average load of the support sensor gradu-
ally increased to 4.3 kN (2.19 MPa), the total load reached
38.7 kN (19.74 MPa), and then the total load of the top
beam dropped to 35.1 kN (17.90 MPa). The twin system
showed that the height yield of the hydraulic support col-
umn was 3.7 cm, as shown in Figure 16(b). When the total
load reached 38 kN (19.39 MPa), the roof broke, the high-
definition monitoring showed that the roof slipped to the
support area below the tilt, the twin system showed that
the support fell 4.2° in the tilt direction, and then quickly
returned to normal, and the average sensor load increased
to 1.7 kN (0.87 MPa).
At 55° inclination Angle, when no load is applied to
the hydraulic support, the average load of the sensor on
the top beam of the support is 1.39 kN (0.71 MPa), and
the total load is 12.51 kN (6.38 MPa). During the load-
ing process, the average load of the support sensor gradu-
ally increased to 4.4 kN (2.24 MPa), the total load reached
39.6 kN (20.20 MPa), and then the total load of the top
beam dropped to 36.4 kN (18.57 MPa). The twin system
showed that the height of the hydraulic support column
yielded 6.7 cm, and the pressure continued. When the
total load reached 36 kN (18.36 MPa), the roof broke, as
Figure 12. Inclination model of 35°
Figure 13. Inclination 45° model
Figure 14. Inclination 55° model
Figure 15. Inclination 65° model
Figure 16. Changes of loading brackets at different angles