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Roadway total-space prestress truss, anchor cable and anchor rod coordinated supporting method

A technology of prestressed anchor cables and truss anchor cables, which is applied to the installation of anchor rods, earthwork drilling, mining equipment, etc., can solve problems such as roof and two-side slip damage, roadway weak and broken, etc., to achieve high strength and rigidity, Strong ability to control surrounding rock deformation and improve stability

Inactive Publication Date: 2015-04-22
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the hazards of the weak and broken roof of the roadway and the sliding damage of the two sides, and design a method for the coordinated support of the roadway full-space prestressed truss anchor cables and anchor rods

Method used

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  • Roadway total-space prestress truss, anchor cable and anchor rod coordinated supporting method
  • Roadway total-space prestress truss, anchor cable and anchor rod coordinated supporting method
  • Roadway total-space prestress truss, anchor cable and anchor rod coordinated supporting method

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] (1) Excavating coal lanes. Excavation is formed according to the designed gross section size, and the section shape of the wellbore is rectangular. During the excavation process, in case of surrounding rock or head-on water seepage, grouting shall be carried out in time to strengthen the support. Try to make the surface of the coal roadway (8) smooth and smooth, avoid unevenness, and create good conditions for the installation of supporting components such as anchor rods and anchor cables. At the same time, it can also make the anchor rod, anchor cable, steel wire mesh and steel belt in a better stress state.

[0027] (2) Roof support. After excavating coal, use Φ20×6300mm~Φ22×6300mm 1×19 strands of high-strength low-relaxation prestressed anchor cable (1) and Φ20mm~Φ22mm left-handed non-longitudinal reinforcement equal-strength threaded steel...

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Abstract

The invention belongs to the field of mine disaster prevention and control safety, and particularly relates to a roadway total-space prestress truss, anchor cable and anchor rod coordinated supporting method. Top plate truss anchor cables in a roadway total-space prestress truss, anchor cable and anchor rod support can penetrate into a coal roadway top deep stable rock stratum, high prestress is formed, side anchor rods can stretch into a deep roadside position and fixed through rebars, high prestress is formed, top plate anchor cable trusses and roadside anchor rod trusses which have different sections are connected through rebar belts, a space supporting system is formed, the synergistic effect can be achieved through the space structure, the anchor rods, the anchor cables and the rebar belts bear continuous load transmission, deformation and breakage of surrounding rock of a roadway are effectively controlled, the self-supporting capacity and the stability of the whole surrounding rock are improved, and therefore reinforcement and stabilization of the roadway are superior to those of other methods. The construction process of the total-space prestress trusses, anchor cables and anchor rods is easier and more convenient compared with that of U-shaped steel and concrete filled steel tube supporting and the like, erection labor intensity is greatly relived, the safety operation degree is increased, rolled steel is saved, and cost is reduced.

Description

technical field [0001] The patent of the present invention belongs to the field of mine disaster prevention and control, and specifically relates to a method for preventing underground disasters through coordinated support of full-space prestressed truss anchor cables. Background technique [0002] At present, with the rapid development of bolt and cable support technology, as well as the complexity and diversification of roadway geology and production conditions, especially when mining weak and broken coal rocks, large deformation of surrounding rock is a relatively common and harmful one. For various geological disasters, conventional support forms are difficult to suppress this deformation, which brings great difficulties to mining. If it is not handled properly, it will cause accidents such as underground roof fall and collapse, and may cause casualties, which greatly increases the construction cost. cost. Therefore, the bolt and cable truss support technology has attra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/00
CPCE21D20/00
Inventor 左建平吴迪张婷刘光文
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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