Study on Asymmetric Support of Anchor Cable with C-Shaped Tube in Inclined Coal Seam Roadway

Abstract

In view of the complex asymmetric deformation characteristics of inclined coal seam roadways and the tensed shear failure of anchor cable supports, the asymmetric support scheme of an anchor cable with a C-shaped tube is proposed. In order to study its supporting effect on an inclined coal seam roadway, this paper first explores the difference in shear performance between an anchor cable with a C-shaped tube and an anchor cable through double shear tests. Then, based on the asymmetric deformation characteristics of an inclined coal seam roadway in the Pangpangta Mine, a numerical simulation is used to study the asymmetric support effect of an anchor cable with a C-shaped tube in an inclined coal seam roadway. The results of the double shear test show that the anchor cable with the C-shaped tube has stronger resistance to shear load than that of the anchor cable. Through the results of the numerical simulation, the original stress field distribution on both sides of the roadway was found to be uneven due to the influence of the coal seam dip angle, and after the excavation of the inclined coal seam roadway, the displacement and plastic zone distribution on both sides showed obvious asymmetric characteristics. Compared with the symmetric support, the asymmetric support can obviously alleviate the asymmetric deformation characteristics of the two sides and effectively control the deformation and plastic failure zone of the roadway. The anchor cable with the C-shaped tube has better resistance to shear deformation than that of the anchor cable. The anchor cable with the C-shaped tube can reduce the deformation and plastic area of the roadway more effectively.

Study on failure mechanism and control of surrounding rock of inclined strata crossing roadway in deep coal mine

“…Ma Q et al (Ma et al, 2022) divided the surrounding rock of an inclined rock roadway into different regions and put forward surrounding rock control schemes such as grouting reinforcement, strengthening support, and pressure relief grouting for different regions. Shan R et al (Shan et al, 2023) proposed a C-shaped tube anchor cable asymmetric support scheme for the complex asymmetric deformation characteristics of an inclined coal seam roadway and the tensile shear failure of anchor cable support. Liu P et al (Liu et al, 2022) studied the deformation characteristics and control technology of the surrounding rock of a roadway along goaf in inclined strata and put forward the support method of anchor cable.…”

Influence of Stress Disturbance on the Deformation of Nearby Cemented Roadways following the Excavation of Chambers

“…Roadways built with weakly cemented material are typically vulnerable to significant issues like rapid decrease in anchoring force, substantial deformation of the neighboring rock, and a brief self-stabilization period. Although the traditional active support methods such as anchor bolt, anchor cable, and combined support with an anchor cable net can effectively control the deformation of the surrounding rock of coal roadways, such methods cannot limit the deformation of the surrounding rock of soft rock roadways and cannot meet the requirements of the support of soft rock roadways under the current coal mining conditions, and the stability of the roadway is difficult to be guaranteed [5][6][7][8][9].…”