CN-116025388-B - Combined supporting device, combined supporting system and method for anchor rod and section steel

Abstract

The invention discloses a combined supporting device of an anchor rod and profile steel, which comprises supporting profile steel, a first arc-shaped plate, a second arc-shaped plate, a reinforcing anchor rod and a supporting anchor rod, wherein the first arc-shaped plate is arranged right above the second arc-shaped plate, the second arc-shaped plate is supported on a bottom plate of a roadway through the supporting profile steel, a waist-shaped groove formed in the circumferential direction of the arc surface of the second arc-shaped plate is formed in the second arc-shaped plate, the upper end of the supporting anchor rod is fixed on the first arc-shaped plate, the lower end of the supporting anchor rod slides in the waist-shaped groove along the circumferential direction of the second arc-shaped plate, and the reinforcing anchor rod is arranged on the lower side face of the first arc-shaped plate. The combined supporting device of the anchor rod and the section steel has high shearing resistance and high bearing capacity, improves the supporting strength of a roadway and improves the supporting capacity.

Inventors

• WANG HUA
• MENG ZHIQIANG
• ZHU CHANGYUAN
• LIU SHUJIE
• SUN LIHUI
• LI XINWANG
• LI SHENGSHENG
• YANG MING
• WANG HANQING

Assignees

• 北京中煤矿山工程有限公司
• 河北工程大学
• 中检集团公信安全科技有限公司

Dates

Publication Date

20260508

Application Date

20221220

Claims (8)

1. 1.A joint supporting method of an anchor rod and profile steel is characterized in that a joint supporting device of the anchor rod and the profile steel is adopted for supporting, the joint supporting device comprises supporting profile steel (11), a first arc-shaped plate (1), a second arc-shaped plate (2), a reinforcing anchor rod (3) and supporting anchor rods (4), the first arc-shaped plate (1) is arranged right above the second arc-shaped plate (2), the second arc-shaped plate (2) is supported on the ground of a roadway through the supporting profile steel (11), a waist-shaped groove (5) which is formed in the circumferential direction of an arc surface of the second arc-shaped plate (2) is formed in the second arc-shaped plate (2), the upper end of the supporting anchor rod (4) is fixed on the first arc-shaped plate (1), the lower end of the supporting anchor rod (4) slides in the circumference of the second arc-shaped groove (5), the reinforcing anchor rod (3) is arranged on the lower side surface of the first arc-shaped plate (1), the waist-shaped groove (5) penetrates through the second arc-shaped plate (2) up and down, and a fastener is arranged on the second arc-shaped plate (2) and abuts against the lower side surface of the second arc-shaped plate (2). The combined support method comprises the following steps: ① The method comprises the steps of pre-burying a first arc plate (1) at the top of a roadway, mounting a reinforcing anchor rod (3) and a supporting anchor rod (4) on the lower side surface of the first arc plate (1), and tamping concrete at the pre-buried position, wherein the lower end of the supporting anchor rod (4) extends out of the top of the roadway; ② The second arc-shaped plate (2) is arranged in the roadway, the second arc-shaped plate (2) is arranged below the first arc-shaped plate (1), the reinforcing anchor rod (3) is inserted into the waist-shaped groove (5), and the limiting part is arranged on the reinforcing anchor rod (3) so that the mounted reinforcing anchor rod (3) can only slide along the circumferential direction of the second arc-shaped plate (2); ③ And (3) setting support profile steel (11) in the roadway, namely measuring the height of the lowest part of the edge of the second arc-shaped plate (2), manufacturing the support profile steel (11) with the corresponding height, and supporting the second arc-shaped plate (2) on the ground of the roadway by using the support profile steel (11).
2. 2. The method for combined support of an anchor rod and a section steel according to claim 1, wherein the axial widths of the first arc-shaped plate (1) and the second arc-shaped plate (2) are consistent.
3. 3. The combined support method of the anchor rods and the profile steel according to claim 1, wherein the number of the reinforcing anchor rods (3) is one or more, the extending square of the reinforcing anchor rods (3) is parallel to the axial direction of the first arc-shaped plate (1), and two ends of the reinforcing anchor rods (3) are connected with two axial ends of the first arc-shaped plate (1) through fixing pieces.
4. 4. A joint support method of an anchor rod and profile steel according to claim 3, wherein the two ends of the reinforced anchor rod (3) are welded with reinforced screw heads (7), the fixing piece comprises a fixed ring (6) welded on the lower side surface of the first arc-shaped plate (1) and reinforced fastening nuts (8) matched with the reinforced screw heads (7), the reinforced screw heads (7) penetrate into the fixed ring (6) to be in threaded connection with the reinforced fastening nuts (8), and the two reinforced fastening nuts (8) are abutted against the opposite sides of the fixed ring (6).
5. 5. The method for combined support of anchor rods and profile steel according to claim 1, characterized in that the support profile steel (11) and the second arc plate are detachably connected through a connecting piece.
6. 6. The combined supporting method of the anchor rod and the profile steel according to claim 1 is characterized by further comprising hoisting anchor rods (14) and steel nets (15), wherein the combined supporting devices are arranged at intervals along the roadway direction, the steel nets (15) are connected between two adjacent second arc plates (2), and the hoisting anchor rods are arranged in the middle of the steel nets (15) to fix the steel nets (15) at the top of the roadway.
7. 7. The joint support method of the anchor rod and the profile steel according to claim 6, wherein the joint support devices are equidistantly arranged along the roadway direction, the arc length of the second arc plates is d, and the distance between the two second arc plates is 2-3 d.
8. 8. The combined supporting method of the anchor rod and the profile steel according to claim 1, wherein the embedded depth of the first arc-shaped plate (1) is 80-120 cm, and the length of the supporting anchor rod (4) is 90-130 cm.

Description

Combined supporting device, combined supporting system and method for anchor rod and section steel Technical Field The invention relates to the technical field of roadway support. In particular to a combined supporting device, a combined supporting system and a combined supporting method for an anchor rod and profile steel. Background Due to factors of surrounding rock covering environment of the working face, the gravity of the overlying strata can be decomposed into forces in multiple directions, deformation or crushing of the top of a roadway is often caused, and various methods are needed to maintain the roadway in order to keep the section size and specification of the roadway and prevent dangerous deformation of the surrounding rock. The roadway support modes include a wood support, a metal support, an anchor bolt support, a stone concrete arch and the like, and the most used U-shaped metal support and anchor bolt support are at present. However, the U-shaped support is mostly supported by point contact, the contact area between the metal support and the roadway wall is small, the bearing capacity is limited, the anchor rod supported by the anchor rod is generally a solid anchor rod, the shearing capacity is poor, the anchor rod is easy to shear and break in the plastic deformation process of surrounding rock, and the anchoring effect is reduced or fails. Disclosure of Invention Therefore, the technical problem to be solved by the invention is to provide a combined support device, a combined support system and a combined support method for an anchor rod and profile steel with high shear resistance and high bearing capacity. In order to solve the technical problems, the invention provides the following technical scheme: the combined supporting device for the anchor rod and the profile steel comprises supporting profile steel, a first arc-shaped plate, a second arc-shaped plate, a reinforcing anchor rod and a supporting anchor rod, wherein the first arc-shaped plate is arranged right above the second arc-shaped plate, the second arc-shaped plate is supported on the ground of a roadway through the supporting profile steel, a waist-shaped groove formed in the circumferential direction of the arc surface of the second arc-shaped plate is formed in the second arc-shaped plate, the upper end of the supporting anchor rod is fixed to the first arc-shaped plate, the lower end of the supporting anchor rod slides in the waist-shaped groove along the circumferential direction of the second arc-shaped plate, and the reinforcing anchor rod is arranged on the lower side face of the first arc-shaped plate. Further, the waist-shaped groove penetrates through the second arc-shaped plate up and down, and the support anchor rod is provided with a first fastening piece propped against the upper side surface of the second arc-shaped plate and a second fastening piece propped against the lower side surface of the second arc-shaped plate. Further, the axial widths of the first arc-shaped plate and the second arc-shaped plate are consistent. Further, the number of the reinforcing anchor rods is one or more, the extending square of the reinforcing anchor rods is parallel to the axial direction of the first arc-shaped plate, and two ends of the reinforcing anchor rods are connected with two axial ends of the first arc-shaped plate through fixing pieces. The fixing piece comprises a fixing ring welded on the lower side face of the first arc-shaped plate and a reinforcing fastening nut matched with the reinforcing thread head, the reinforcing thread head penetrates into the fixing ring to be in threaded connection with the reinforcing fastening nut, and the two reinforcing fastening nuts are abutted against the opposite sides of the fixing ring. Further, the supporting section steel and the second arc-shaped section steel are detachably connected through a connecting piece. The combined support system for the anchor rods and the section steel comprises the combined support device for the anchor rods and the section steel, hoisting anchor rods and steel nets, wherein the combined support device is arranged at intervals along the direction of a roadway, the steel nets are connected between two adjacent second arc plates, and the anchor rods are arranged in the middle of the steel nets to fix the steel nets at the top of the roadway. Furthermore, the combined supporting devices are equidistantly arranged along the roadway direction, the arc length of the second arc-shaped steel is d, and then the distance between the two second arc-shaped steel is 2 d-3 d. A combined supporting method of an anchor rod and profile steel comprises the following steps: ① The method comprises the steps of pre-burying a first arc plate at the top of a roadway, namely, firstly mounting a reinforcing anchor rod and a supporting anchor rod on the lower side surface of the first arc plate, and then tamping concrete at the pre-buried position; ② The second arc