24 2 2007 06 Journal of Mining & Safety Engineering Vol 24 No 2 J une 2007 :167323363 (2007) 0220150205 1, 1, 2 1, (1, 221008 ; 2 ( ), 235000) :,,,,, : ; ; ; ; : TD 353 6 : A Prest ress Truss Bolt Support Technology for Coal Roadway L I Gui2chen 1, ZHAN G Nong 1, L IU Zhao2hui 2, KAN Jia2guang 1 (1 State Key Laboratory of Coal Resource and Mine Safety, China University of Mining & Technology, Xuzhou, Jiangsu 221008, China ; 2 Xutuan Coal Mine, Huaibei Mining ( Group) Co Ltd, Huaibei, Anhui 235000, China) Abstract : A new pattern of support technology of prestress trusses was expounded in detail, in2 cluding it s conception, mechanism, advantages as compared to anchor cable, forms, and con2 struction technique The innovation of t he technology and it s application character in roadway are also introduced According to t he practical use in Huaibei Xutuan Coal Mine, t he character and action of t he prestress truss structure is verified Therefore, t he prestress truss technology can not only control the distortion of roadway, but also imp rove t he driving speed, resulting in a reduction of cost, making t he roadway be safe and reliable In addition, it has provided a ba2 sis for support in coal mines wit h various complex conditions Key words : coal roadway ; bolt supporting ; p rest ress t russ ; support technology ; applicatio n st udy [122 ] : 1 1),,,,,, 70 %, 2) 90 %,, : 2006211215 : (50674085) : (19802),,,, E2mail : liguichen @126 com Tel : 13775898935 转载
2 : 151 3),, 50 %,,, 4),,,,, 5),,,,,, 6),,, ; 2,,,, [ 3 ],,,,,,,,,,, 70 %, 2/ 3,,,,,,,,, 3, [4 ],,, [ 5 ], 3 1,,,, 1 [6 ] 1 ( ) Fig 1 The structure of pretension truss (some cable) 3 2,, ( 2),,,,,,,,,,, 2 Fig 2 The load structure and action mechanism of pretension truss 3 3 :1),,, ;2),, ;,, ;3),
152 24 ;4), ;,, ;5),,, [7 ] 3 4 3 4 1,,,, 4 0 m,,,, 3,, ( 4),,,, 5 Fig 5 The application of the vertical trusses on the wall 3 Fig 3 The support forms of the roof trusses 3 4 2 4 Fig 4 The linker of trusses,,,,,,,, [8 ] :1),, 5,, ;2), 6, 6 ( ) Fig 6 The application of the horizontal trusses on the wall ( Huaibei Xutuan Coal Mine) 3 5,, 3 5 1, 60 [ 9 ],, 45 55 ; ;, ;,, 70 kn 3 5 2,,,,,,, 10,,,
2 : 153, 7 7 (mm) Fig 7 The vertical truss was adjusted horizontal truss on the wall 4 72 23 71 23,,,,,,,,,,,,,,,,,,, 8 [10 ], 260 m/ 72 23,, 6 200 300 mm, 200 mm,( 50 m ) 500 600 mm,,, 9, 2006 4 5 000 m,, 9 Fig 9 The laceration of channel steel beam eyelet 5 1) 72 23,,,,, 2) 72 23,,,,, 30 % 3), 4) 10 000 km, 20 % 30 %,,, : 8 72 23 ( ) (mm) Fig 8 Coal roadway bolt (trusses) support methods of the 72 23 working face in Xutuan coal mine U, 500, [1 ],,, [ M ] :,1999 [2 ],,, [ M ] :,2004 [3 ],,,
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