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Gold Science and Technology ›› 2020, Vol. 28 ›› Issue (5): 727-733.doi: 10.11872/j.issn.1005-2518.2020.05.132

• Mining Technology and Mine Management • Previous Articles     Next Articles

Combined Support Technology of Resin Anchor Cable for High Stress Rock Mass Under Deep Complex Structure in Jiaojia Gold Mine

Yumin CHEN1(),Chenglong WANG1,Xiaofei LI1,Xiang JIANG1,Xingdong ZHAO2   

  1. 1.Shandong Gold Group Co. ，Ltd. ，Jinan 250101，Shandong，China
    2.Research Center for Mining Ground Pressure and Control，Northeastern University，Shenyang 110819，Liaoning，China
  • Received:2020-07-24 Revised:2020-09-15 Online:2020-10-31 Published:2020-11-05

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Abstract:

The upward horizontal slicing and filling mining method is adopted in No.1 sub roadway of -750 m middle section in Jiaojia gold mine.Due to the development of layered joints on the roof and staggered distribution of joint structures，wedge-shaped caving and spalling failure of the roof occur.It is difficult to control the stability of rock mass with traditional bolt support.In this paper，through the field engineering geological survey and rock mechanics experiment，the rock mass quality grade is determined to be grade Ⅳ.The composite support system of resin anchor cable，metal mesh and shotcrete were selected by stability chart method，and the reasonable structural parameters of resin anchor cable support were calculated theoretically.Through the industrial test in -750 m middle section，the practical results show that the stability of rock mass has been significantly improved after using resin anchor cable support system.Through field displacement monitoring，the safety，reliability and effectiveness of resin bolt support system are further verified，which provides strong technical support for mining body under deep complex structure and accumulates certain practical experience.

Key words: complex structure, high stress, supporting structure parameters, rock mass quality grade, resin anchor cable, supporting structure parameters

CLC Number: 

  • TD353

Fig.1

Roof falling of the vein crossing tunnel in the -750 m middle section of Jiaojia gold mine"

Fig.2

Spall failure of roadway along the vein of 114 line in the -750 m middle section of Jiaojia gold mine"

Fig.3

Layout of measuring points"

Table 1

Statistical results of structural plane parameters of rock mass in the -750 m middle section of Jiaojia gold mine"

测点编号组别倾向/(°)倾角/(°)迹长/m间距/m节理线密度/（个·m-3）节理体密度/（个·m-3）条数/个
11292.557.571.410.482.085.3113
2144.477.640.610.313.2315

Fig.4

J180111204 joint iso-intensity（a） and tendency rose diagram（b）"

Fig.5

Resin anchor cable support parameters"

Fig.6

Arrangement of monitoring points for convergence deformation"

Fig.7

Deformation diagram of tunnel displacement monitoring"

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