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Gold Science and Technology ›› 2018, Vol. 26 ›› Issue (6): 744-749.doi: 10.11872/j.issn.1005-2518.2018.06.744

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Method for Repairing Collapse of Orepass Wall Based on Double-Controlled Tension Cable Bundles

Xiushan QIN1,2,3(),Hui CAO1,2,3,Ye YUAN1,2,3,Zhijie ZHENG1,2,3   

  1. 1. BGRIMM Technology Group，Beijing 100160，China
    2. National Center for International Joint Research on Green Metal Mining，Beijing 100160，China
    3. Beijing Key Laboratory of Nonferrous Intelligent Mining Technology，Beijing 100160，China
  • Received:2018-03-26 Revised:2018-08-23 Online:2018-12-31 Published:2019-01-24

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Abstract:

The orepass is an important project to slide ore，its structure is simple and convenient to use，but after long-tern use，because the ore constantly impact and wear the orepass wall，it is easy to occur the phenomenon of orepass wall collapses.For most mines，there are some difficulties in the maintenance and repair of chute，so it is necessary to choose a safe，effective and reliable technical scheme for chute reinforcement.Aiming at of the disadvantage of existing support methods that occupying the chute with long construction time，a technical proposal for the integrated reinforcement using double-controlled tension cable bundles from the periphery of ore pass to the inside of it was proposed，and the principle of its action is also described.By establishing the mechanical model of double-controlled tension cable bundles，the design method of cable load that satisfied the safety factor was analyzed.Combined with field engineering practice and monitoring data analysis，it’s proved that the double-controlled tension cable bundles can make the collapsed wall stable for a long time after being reinforced，and can save plenty of repairing time by reducing the occupancy of the ore pass.The method for repairing collapse of ore pass wall based on double-controlled tension cable bundles provides a feasible way to solve the problem of repairing large-scale collapse of the ore pass wall in a safe and efficient way.

Key words: double-controlled tension, cable bundles, collapse of the wall, orepass repairing, mechanical model, safety factor, reinforcement effect

CLC Number: 

  • TD521

Fig.1

Mechanical model for stability analysis"

Fig.2

Three-dimensional laser scanning results of orepass"

Table 1

Mechanical parameters of rock mass of"

参数 数值 参数 数值
内摩擦角φ/(o) 39 弹性模量E/GPa 9
黏聚力c/MPa 0.7 重力密度γ/(kN·m-3) 32
抗拉强度st /MPa 0.7 泊松比μ 0.22

Fig.3

Geological profile of rock mass near the orepass"

Fig.4

Plane layout diagram of double-control anchor cable"

Fig.5

Longitudinal profile of double-control anchor cable"

Fig.6

Schematic diagram of monitoring structure for anchor cable dynamometer"

Fig.7

Long-term monitoring curve of anchor cable"

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