14
support to the floor, so as to ensure the good con-
tact between the support and the roof and floor.
2. In the process of advancing the working face, the
damage of the support to the floor due to roll is
avoided. Under the condition of particularly soft
floor, the ‘ bottom lifting ‘ of the support should
be considered.
3. Adding base adjustment frame and side pushing
device, reinforced side guard plate, lifting base
device, etc., can effectively solve the problem of
support sinking under soft bottom conditions.
CONCLUSIONS
1. The 1 :5 large-scale laboratory hydraulic support
solid model was developed. After modeling and
rendering, it was imported into Unity 3D to estab-
lish an experimental-scale virtual support model,
which realized the real-time sharing of the posi-
tion and load data of the laboratory hydraulic sup-
port physical solid model and the twin model, and
completed the development of the twin system.
2. The evolution law of support load under different
inclination angles was studied by combining field
measurement and physical analog experiment.
That is, with the increase of the inclination Angle
of the working face, first, the initial support force
required by the support becomes smaller, and the
damage degree of the roof increases When the roof
is soft, the lifting operation can avoid the instabil-
ity of the support to a certain extent. Under static
load, the load on the top beam decreases with the
increase of inclination Angle. Under the effect of
positive pressure, there is no obvious difference in
the load of different parts of the top beam under
four angles. Under the action of pushing back, the
load on the upper part of the inclined shield beam
is the largest, followed by the middle part, and the
lower part is the smallest. With the increase of the
inclination Angle, the load on the upper part of
the inclined shield beam gradually increases, and
the load on the lower part of the inclined shield
beam gradually decreases. Under the action of lat-
eral pushing, the load on the side of the top beam
is greater than that on the surface of the top beam,
and the load in each period is greater than that in
the previous period.
3. Numerical simulation experiments verified the
results of the above physical simulation research.
In order to reduce the transmission effect of the
column on the impact load of the bottom plate or
the base and avoid the instability of the support,
improvement measures for the hydraulic support
were proposed according to the research conclu-
sions, and good application results were achieved.
REFERENCES
[1] Kulakov V.N..Stress state in the face region of
a steep coal bed [J]. Journal of Mining Science,
1995(09):161168.
[2] Bodi J. Safety and technological aspects of man less
exploitation technology for steep coal seams[C].27th
international conference of safety in mines research
institutes,1997:955965.
[3] Singh, T.N., Gehi, L.D.State behavior during min-
ing of steeply dipping thick seams-A case study[C].
Proceedings of the International Symposium on
Thick Seam Mining,1993: 311-315.
[4] DREBENSTEDT C,GRAFE R. Stereoscopic
3D-display for mine planning and geological model-
ing, 2001[C].2001.
[5] Daniel Gleeson. WCM’s Woodhouse Colliery met
coal project heads for site work[EB/OL]. [2021-1-7].
[6] HOLLANDS R, DENBY B, BROOKS G. SAFE-
VR-A virtual reality safety training system[J].
Proceedings of APCOM’99, 1999.
[7] Wen J R, Mu-Qing W U ,Jing-Fang S U .Cyber-
physical System[J]. ACTA AUTOMATICA SINICA,
2012, 38(4):507-517.
[8] Kraft E M .The Air Force Digital Thread/Digital Twin
Life Cycle Integration and Use of Computational and
Experimental Knowledge[C]// 54th AIAA Aerospace
Sciences Meeting. 2016.
[9] GAMLIN A, BREEDON P, ME-DJDOUB
B. Immersive Virtual Reality Deployment in a
LeanManufacturing Environment[C]. International
Conference on Interactive Technologies &
Games.IEEE Computer Society. Nottingham,
ENGLAND.2014.
[10] Rosen R, Von Wichert G, Lo G ,et al. About The
Importance of Autonomy and Digital Twins for the
Future of Manufacturing[J]. IF AC PapersOnLine,
2015, 48(3):567-572.
[11] Schluse M, Rossmann J .From simulation to
experimentable digital twins: Simulation-based
development and operation of complex technical
systems[C]// IEEE International Symposium on
Systems Engineering. IEEE, 2016.
[12] ELLGASS W, HOLT N, Saldana-Lemus H, et al. A
digital twin concept for manufacturing systems[C].
support to the floor, so as to ensure the good con-
tact between the support and the roof and floor.
2. In the process of advancing the working face, the
damage of the support to the floor due to roll is
avoided. Under the condition of particularly soft
floor, the ‘ bottom lifting ‘ of the support should
be considered.
3. Adding base adjustment frame and side pushing
device, reinforced side guard plate, lifting base
device, etc., can effectively solve the problem of
support sinking under soft bottom conditions.
CONCLUSIONS
1. The 1 :5 large-scale laboratory hydraulic support
solid model was developed. After modeling and
rendering, it was imported into Unity 3D to estab-
lish an experimental-scale virtual support model,
which realized the real-time sharing of the posi-
tion and load data of the laboratory hydraulic sup-
port physical solid model and the twin model, and
completed the development of the twin system.
2. The evolution law of support load under different
inclination angles was studied by combining field
measurement and physical analog experiment.
That is, with the increase of the inclination Angle
of the working face, first, the initial support force
required by the support becomes smaller, and the
damage degree of the roof increases When the roof
is soft, the lifting operation can avoid the instabil-
ity of the support to a certain extent. Under static
load, the load on the top beam decreases with the
increase of inclination Angle. Under the effect of
positive pressure, there is no obvious difference in
the load of different parts of the top beam under
four angles. Under the action of pushing back, the
load on the upper part of the inclined shield beam
is the largest, followed by the middle part, and the
lower part is the smallest. With the increase of the
inclination Angle, the load on the upper part of
the inclined shield beam gradually increases, and
the load on the lower part of the inclined shield
beam gradually decreases. Under the action of lat-
eral pushing, the load on the side of the top beam
is greater than that on the surface of the top beam,
and the load in each period is greater than that in
the previous period.
3. Numerical simulation experiments verified the
results of the above physical simulation research.
In order to reduce the transmission effect of the
column on the impact load of the bottom plate or
the base and avoid the instability of the support,
improvement measures for the hydraulic support
were proposed according to the research conclu-
sions, and good application results were achieved.
REFERENCES
[1] Kulakov V.N..Stress state in the face region of
a steep coal bed [J]. Journal of Mining Science,
1995(09):161168.
[2] Bodi J. Safety and technological aspects of man less
exploitation technology for steep coal seams[C].27th
international conference of safety in mines research
institutes,1997:955965.
[3] Singh, T.N., Gehi, L.D.State behavior during min-
ing of steeply dipping thick seams-A case study[C].
Proceedings of the International Symposium on
Thick Seam Mining,1993: 311-315.
[4] DREBENSTEDT C,GRAFE R. Stereoscopic
3D-display for mine planning and geological model-
ing, 2001[C].2001.
[5] Daniel Gleeson. WCM’s Woodhouse Colliery met
coal project heads for site work[EB/OL]. [2021-1-7].
[6] HOLLANDS R, DENBY B, BROOKS G. SAFE-
VR-A virtual reality safety training system[J].
Proceedings of APCOM’99, 1999.
[7] Wen J R, Mu-Qing W U ,Jing-Fang S U .Cyber-
physical System[J]. ACTA AUTOMATICA SINICA,
2012, 38(4):507-517.
[8] Kraft E M .The Air Force Digital Thread/Digital Twin
Life Cycle Integration and Use of Computational and
Experimental Knowledge[C]// 54th AIAA Aerospace
Sciences Meeting. 2016.
[9] GAMLIN A, BREEDON P, ME-DJDOUB
B. Immersive Virtual Reality Deployment in a
LeanManufacturing Environment[C]. International
Conference on Interactive Technologies &
Games.IEEE Computer Society. Nottingham,
ENGLAND.2014.
[10] Rosen R, Von Wichert G, Lo G ,et al. About The
Importance of Autonomy and Digital Twins for the
Future of Manufacturing[J]. IF AC PapersOnLine,
2015, 48(3):567-572.
[11] Schluse M, Rossmann J .From simulation to
experimentable digital twins: Simulation-based
development and operation of complex technical
systems[C]// IEEE International Symposium on
Systems Engineering. IEEE, 2016.
[12] ELLGASS W, HOLT N, Saldana-Lemus H, et al. A
digital twin concept for manufacturing systems[C].