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An inner-pulling anchor cable structure with a large-span roof cut into a roadway roof

A large-span, anchor cable technology, applied in the installation of anchor rods, mining equipment, earth square drilling and mining, etc., can solve problems such as uneven settlement of the roof

Active Publication Date: 2021-09-10
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of non-uniform settlement of the roof of the roadway without coal pillars, the present invention provides an inner pull anchor cable structure for the roof of the roadway with a large span

Method used

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  • An inner-pulling anchor cable structure with a large-span roof cut into a roadway roof
  • An inner-pulling anchor cable structure with a large-span roof cut into a roadway roof
  • An inner-pulling anchor cable structure with a large-span roof cut into a roadway roof

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Embodiment 1

[0029] Such as figure 1 As shown, during the excavation, the roadway 1 supports the roof 2 while excavating: when the roadway 1 reaches the first distance along the excavation direction, the roof 2 is supported by the first anchor cable system A1; when the roadway 1 continues to excavate to the first distance Two distances, the roof 2 is supported by the second anchor cable system A2; along the roadway excavation direction, the first anchor cable system A1 and the second anchor cable system A1 are arranged alternately, and the distance between them is 600mm≤a ≤1200mm. Step 1: If figure 1 , 2 As shown in and 3, the support of the first anchor cable system A1 includes the following steps: along the roadway width direction, on the roadway roof 2 from the roadway center line, to the solid coal side 3 anchor cables are named Z in turn 1 ,Z 2 ,Z 3 ;To the gob side 4, the bolt cables are named Z in sequence 1 ',Z 2 ',Z 3 ’; anchor cable spacing 600mm≤b≤1200mm; anchor cable Z ...

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Abstract

The present invention relates to an inner pull anchor cable structure for the roof of a long-span truncated roadway. The inner tension anchor cable truss beam system A3 between the systems; the A1 system focuses on the side roof support of the solid coal side, the A2 system focuses on the central area support of the roof, and the A3 system focuses on the side roof structure of the goaf and the deep stable surrounding rock. Mechanical connection, through the transmission of internal forces, mutual influence, and mutual cooperation among the three anchor cable systems, the stability control of the roof during the excavation is jointly realized. Among them, the lower truss structure of A3 has the function of yielding pressure and absorbing energy, which can avoid the tearing of the truss structure while exerting sufficient surface protection on the roof. The integrated arrangement of anchor rods and anchor cables in the same row is conducive to improving the stress state of shallow coal and rock mass, increasing the reinforcement strength of shallow coal and rock mass, and limiting deformation and damage of shallow surrounding rock.

Description

technical field [0001] The invention relates to the field of coal mine roadway support, in particular to an inner pull anchor cable structure for a large-span roof cut into a roadway roof. Background technique [0002] Roof cutting into roadway is a new mining method without coal pillars. It cancels the filling rock pillars in the conventional gob-side entry retention, and does not need to use artificial filling materials. It only needs to unload the roof and lower the roof. Coal pillar-free mining can be realized by combining the crushing and swelling characteristics of the coal body. In fact, due to the particularity of the roadway cutting process without coal pillars, the asymmetry of the surrounding rock structure and stress distribution along the central axis of the roadway will result. 1. In the coal rock mass that has been damaged during the compaction process, one side is the solid coal that maintains good integrity. The mechanical properties of the two are signific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D20/00E21D21/00
CPCE21D20/00E21D21/008
Inventor 张广超臧传伟陶广哲文志杰陈连军蒋邦友徐美慧赵德帅张书磊张付强孙将朱绍辉
Owner SHANDONG UNIV OF SCI & TECH
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