›› 2012, Vol. 33 ›› Issue (11): 3374-3384.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of combination components coupling of pressure relief anchor box beam support system and application

WANG Qi1, 2，LI Shu-cai1，LI Wei-teng1，LI Zhi1，JIANG Bei1，MIAO Su-jun2， LI Hai-yan1，WANG De-chao1，WANG Hong-tao1   

  1. 1. Research Center of Geotechnical and Structural Engineering , Shandong University, Jinan 250061, China; 2. Post-Doctoral Scientific Research Station, Yankuang Group Company Limited, Zoucheng, Shandong 273500, China
  • Received:2011-11-14 Online:2012-11-12 Published:2012-11-14

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Abstract: The current research situations of anchor beam support system and composite members coupling support are summarized; and the necessity and significance of coupling support research of composite members in anchor beam support system are also researched. High strength pressure relief anchor box beam support system is developed, which is guided by the support idea: controlling at first, pressure yielding behind and then resistance. The coupling efficiency weights of composite members are obtained through the method of analytic hierarchy process; and utilization ratio of whole performance, coupling efficiency and control effect of surrounding rock of members in support system are put forward. The results of thirteen numerical test schemes show that coupling efficiency of Ⅱ12c+? 22 cable, Ⅱ12b+? 22 cable and Ⅱ12a+? 17.8 cable support system are good; the coupling efficiency of support system is markedly affected by cable type; increasing prestressing force is good for raising whole utilization ratio and coupling efficiency, and improving control effect of surrounding rock. The force measuring anchor box beams are designed and made; and the Ⅱ12b+? 22 anchor beam support system is applied to field test. Monitoring results show that the utilization ratio of whole performance is 54.51%; the coupling efficiency of members is 75.61%; members of system keep pace with each other in load supporting; roof settlement in coal roadway is 148 mm and walls displacement of roadway is 180 mm; and surrouding rock deformation is controlled well during roadway excavation.

Key words: box supporting beam, anchor yielding link, composite members, coupling efficiency, numerical test, field test

CLC Number: 

  • TD 313
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