Determining method for positions of reinforcing of gob-side entry roofs through cable-stayed anchor cables

Abstract

The invention relates to a determining method for the positions of reinforcing of gob-side entry roofs through cable-stayed anchor cables. As for traditional reinforcing of the gob-side entry roofs, anchor cables inclining towards entity coal sides are driven nearby roadway filled bodies to protect the stability of retained roadways, but the actual effect is very poor. The method is particularly suitable for determining of arrangement of the cable-stayed anchor cables of the gob-side entry roofs. According to the method, the poor effect of reinforcing of the roofs through the roof cable-stayedanchor cables is mainly caused by the unreasonable designed and arranged positions of the retained roadway roof cable-stayed anchor cables, thus in the method, the retained roadway roofs are regardedas thin plates each with one pair of opposite edges being fixedly and simply supported and the other pair of opposite edges being free, maximum and minimum main stress expressions of the thin platesare obtained through calculation, the maximum main stress of the thin plates is compared with the rock tensile strength, thus the stress ratio coefficient of the thin plates is obtained, when the stress ratio coefficient is larger than 1, rock plates are damaged, and the position needs to be reinforced by driving the cable-stayed anchor cables. According to the method, calculation is easy, achievement is easy, and safety and reliability are achieved.

Description

technical field [0001] The invention relates to a method suitable for optimizing and determining the position of a cable-stayed anchor cable on the roof of a gob-side entry retaining with a large section and large deformation, and in particular to a method for determining the reinforcement position of a cable-stayed anchor cable on the roof of a gob-side entry retaining. Background technique [0002] Gobside retaining is an important roadway protection method in coal pillar-free mining. There are many methods of retaining support and technology, and most of the roadway retaining after the primary mining and secondary mining, the roof, two sides, and even the bottom The drum is more serious, and the reinforcement of the roof includes methods such as repairing single pillars and large anchor cables on the roof, especially anchor cables on the roof are more common, but the effect of anchor cable reinforcement is not obvious in many cases. [0003] The traditional gob-side retai...

AI Technical Summary

Problems solved by technology

[0002] Gob-side retaining is an important roadway protection method in coal pillar-free mining. There are many methods of retaining support and technology, and most of the roadway retaining after the primary mining and secondary mining, the roof, two sides, and even the bottom The drum is more serious, and the reinforcement treatment of the roof includes repairing single pillars, large anchor cables on the roof, etc., especially anchor cables on the roof are more common, but the effect of anchor cable reinforcement is not obvious in many cases

[0003] The traditional gob-side retaining roof reinforcement anchor cables are generally arranged near the roadway filling body, and a row of anchor cables are laid along the roadway axial direction. The anchor cables are vertical to the roof and inclined to the solid coal side. The roof is deformed, indicating that the location of the anchor cable is unreasonable

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