11
“stent-surrounding rock” system is difficult to maintain the
working resistance required by the support, and it is easier
to topple and lose stability.
When the inclination Angle is 35°, 45°, 55° and 65°, as
shown in Figure 19(a), the static load of 40 kN is applied
to the top beam, and the average load of the top beam
is 4.16 kN, 3.74 kN, 3.35 kN and 2.86 kN respectively.
When the static load is applied to the top beam, with the
increase of the inclination Angle, the average load gradually
decreases. The component of gravity perpendicular to the
rock layer gradually decreases. Sensor numbers are shown
in Figure 19(b). Sensors No. 1, 2 and 3 (upper inclined
area) No. 4, 5 and 6 (middle inclined area)
No. 7, 8 and 9 (lower inclined area) under four differ-
ent inclination angles. The inducement of the above char-
acteristics is mainly caused by the unbalanced load of the
support under the Angle effect.
When the inclination angles are 35°, 45°, 55° and
65°, as shown in Figure 20(a), under the positive pres-
sure impact, the average load of the top beam is 3.47 kN,
3.62 kN, 3.69 kN and 3.57 kN respectively, and there is
no significant difference in the load under the four inclina-
tion angles, which is because the dynamic load impact has
a short impact time and the load is relatively uniform under
the positive pressure impact.
When the inclination angles are 35°, 45°, 55° and 65°,
as shown in Figure 20 (b), the sensors on the shield beam
show the characteristics that No. 5 and 6 sensors (upper
inclined area) have the largest load, followed by No. 3 and 4
sensors (middle of the top beam), and No. 1 and 2 sensors
(lower inclined position) have the smallest load. With the
increase of inclination Angle, the load on the upper part of
the shield beam gradually increases, while the load on the
lower part decreases.
Under the lateral thrust impact, as shown in
Figure 20(c), the load reading of the two sensors on the side
of the top beam is significantly greater than that of the sen-
sor on the surface of the top beam. The load reading of the
surface sensor is said to change periodically, and the value
of each period is greater than that of the previous period. As
the inclination increases, all sensor readings increase.
Figure 19. Variation of top beam load with tilt Angle under
static load
Figure 20 Changes of hydraulic support with tilt Angle
under different dynamic loads
“stent-surrounding rock” system is difficult to maintain the
working resistance required by the support, and it is easier
to topple and lose stability.
When the inclination Angle is 35°, 45°, 55° and 65°, as
shown in Figure 19(a), the static load of 40 kN is applied
to the top beam, and the average load of the top beam
is 4.16 kN, 3.74 kN, 3.35 kN and 2.86 kN respectively.
When the static load is applied to the top beam, with the
increase of the inclination Angle, the average load gradually
decreases. The component of gravity perpendicular to the
rock layer gradually decreases. Sensor numbers are shown
in Figure 19(b). Sensors No. 1, 2 and 3 (upper inclined
area) No. 4, 5 and 6 (middle inclined area)
No. 7, 8 and 9 (lower inclined area) under four differ-
ent inclination angles. The inducement of the above char-
acteristics is mainly caused by the unbalanced load of the
support under the Angle effect.
When the inclination angles are 35°, 45°, 55° and
65°, as shown in Figure 20(a), under the positive pres-
sure impact, the average load of the top beam is 3.47 kN,
3.62 kN, 3.69 kN and 3.57 kN respectively, and there is
no significant difference in the load under the four inclina-
tion angles, which is because the dynamic load impact has
a short impact time and the load is relatively uniform under
the positive pressure impact.
When the inclination angles are 35°, 45°, 55° and 65°,
as shown in Figure 20 (b), the sensors on the shield beam
show the characteristics that No. 5 and 6 sensors (upper
inclined area) have the largest load, followed by No. 3 and 4
sensors (middle of the top beam), and No. 1 and 2 sensors
(lower inclined position) have the smallest load. With the
increase of inclination Angle, the load on the upper part of
the shield beam gradually increases, while the load on the
lower part decreases.
Under the lateral thrust impact, as shown in
Figure 20(c), the load reading of the two sensors on the side
of the top beam is significantly greater than that of the sen-
sor on the surface of the top beam. The load reading of the
surface sensor is said to change periodically, and the value
of each period is greater than that of the previous period. As
the inclination increases, all sensor readings increase.
Figure 19. Variation of top beam load with tilt Angle under
static load
Figure 20 Changes of hydraulic support with tilt Angle
under different dynamic loads