Reinforcing device for narrow coal pillar between roadways

Abstract

The invention discloses a reinforcement device for a narrow coal pillar between roadways, which comprises a narrow coal pillar, a top plate and a bottom plate, a top plate is fixed above the narrow coal pillar, a bottom plate is fixed below the narrow coal pillar, and The column includes an anchor cable and a guard member plate, and an anchor hole is opened on the narrow coal pillar, and the guard plate member plate is fixedly installed on both sides of the narrow coal pillar, and the upper and lower parts of the guard plate member plate are provided with connecting devices, The anchor cable is located in the anchor hole, and the anchor cable passes through the anchor hole, and both ends of the anchor cable extend to the guard plate member, and both ends of the anchor cable are provided with fixed locks, and the anchor hole There are five anchor holes in the upper part of the narrow coal pillar symmetrically, one anchor hole in the middle part and two symmetrically in the lower part. The first grouting layer and the second grouting layer are arranged on the narrow coal pillar layer, the first grouting layer is located on the inner wall of the anchor hole. The invention has the advantages of simple structure, convenient and fast installation, reliable support, material saving and improved resource recovery rate.

Description

technical field [0001] The invention relates to the technical field of reinforcement devices, in particular to a reinforcement device for narrow coal pillars between roadways. Background technique [0002] With the increase of coal mining intensity, it gradually develops from shallow to deep. Deep mining is characterized by high ground stress, complex structure, low strength of surrounding rock, and higher and higher requirements for roadway stability control. 5m-10m coal pillars are usually reserved to protect the roadway along the gob-side entry, gob-side entry, and between the upper and lower mountains. Deformation-instability-destruction will cause difficulties in the safe production of coal mines, and at the same time, leaving wide coal pillars will cause a lot of waste of resources. In order to improve the recovery rate and keep narrow coal pillars, the coal pillars are protected by anchor cable nets and steel belt surface protection components, but there are still ne...

AI Technical Summary

Problems solved by technology

5m-10m coal pillars are usually reserved to protect the roadway along the gob-side entry, gob-side entry, and between the upper and lower mountains. Deformation-instability-destruction will cause difficulties in the safe production of coal mines, and at the same time, leaving wide coal pillars will cause a lot of waste of resources

In order to improve the recovery rate and keep narrow coal pillars, the coal pillars are protected by anchor cable nets and steel belt surface protection components, but there are still net pockets, anchor rod failure and damage, and large deformation and damage of coal pillars, which seriously affect the safety of mine production. At the same time, the generally used narrow coal pillars are often severely corroded under the mine, the service life of narrow coal pillars is greatly shortened, and the overall time and cost requirements for narrow coal pillar replacement are relatively large, which is not conducive to economic and safe production; narrow coal pillars are generally made of steel products, In use, due to mining disturbance, steel products have insufficient toughness and are easy to break. The grouting layer is a parallel structure, the structure is unstable, and the compressive capacity is low

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