4
The physical model of hydraulic support is based on
the support of a mining machine manufacturer and is made
according to the geometric similarity ratio 5:1. The model
not only has the basic functions of the prototype support,
but also has the functions of pressure relief, side protection,
side adjustment and bottom lifting. The hydraulic support
completed in design is shown in Figure 3, the similarity
ratio of bulk density ag =gp/gm =1, the similarity ratio of
strength as =sp/sm =al · ag =5 and similarity ratio of
external force aF =as · sl2 =125 ,and the specific param-
eters are shown in Table 2.
Attitude Analysis of Hydraulic Support Physical Model
The hydraulic support is mainly composed of a base, a
column, a top beam, a cover beam, a protection plate, a
hydraulic cylinder, a support rod, a traction rod and other
components, which work together to achieve the lifting and
moving functions of the support. In the process of move-
ment, each component does not move as an individual, but
cooperatively, so it is necessary to measure and calculate the
spatial configuration of each component at each time point.
Figure 2. Large scale experimental bench
Table 1. Experimental platform parameters
Item
Parameter
Description
Outer frame length, width and height 11 m×8.5 m×7.5 m
Inner frame length, width and height 4.2 m×2.4 m×1.7 m
Inner frame inclination range 0–67° stepless
adjustable
Load hydraulic cylinder stroke 200 mm
Vertical and lateral loading pressures 0–0.2 MPa
Load pressure sensor range 35 t
Table 2 Parameters of hydraulic support
Parameter Name
Solid Support
Parameter
Model Support
Parameter
Height of support 2,200–4,500 mm 440–900 mm
Rated working
resistance
7000 kN 56 kN
Rated initial holding
force
5,066 kN 40.528 kN
Support width 1,680–1,880 mm 336–376 mm
Adapt to the inclination
of the working face
≤60° ≤67°
Pumping station
pressure
31.5 MPa 6.3 MPa
The physical model of hydraulic support is based on
the support of a mining machine manufacturer and is made
according to the geometric similarity ratio 5:1. The model
not only has the basic functions of the prototype support,
but also has the functions of pressure relief, side protection,
side adjustment and bottom lifting. The hydraulic support
completed in design is shown in Figure 3, the similarity
ratio of bulk density ag =gp/gm =1, the similarity ratio of
strength as =sp/sm =al · ag =5 and similarity ratio of
external force aF =as · sl2 =125 ,and the specific param-
eters are shown in Table 2.
Attitude Analysis of Hydraulic Support Physical Model
The hydraulic support is mainly composed of a base, a
column, a top beam, a cover beam, a protection plate, a
hydraulic cylinder, a support rod, a traction rod and other
components, which work together to achieve the lifting and
moving functions of the support. In the process of move-
ment, each component does not move as an individual, but
cooperatively, so it is necessary to measure and calculate the
spatial configuration of each component at each time point.
Figure 2. Large scale experimental bench
Table 1. Experimental platform parameters
Item
Parameter
Description
Outer frame length, width and height 11 m×8.5 m×7.5 m
Inner frame length, width and height 4.2 m×2.4 m×1.7 m
Inner frame inclination range 0–67° stepless
adjustable
Load hydraulic cylinder stroke 200 mm
Vertical and lateral loading pressures 0–0.2 MPa
Load pressure sensor range 35 t
Table 2 Parameters of hydraulic support
Parameter Name
Solid Support
Parameter
Model Support
Parameter
Height of support 2,200–4,500 mm 440–900 mm
Rated working
resistance
7000 kN 56 kN
Rated initial holding
force
5,066 kN 40.528 kN
Support width 1,680–1,880 mm 336–376 mm
Adapt to the inclination
of the working face
≤60° ≤67°
Pumping station
pressure
31.5 MPa 6.3 MPa