CN101487396B - Statically indeterminate equal-strength support anchor cable locking mechanism and method - Google Patents

Abstract

A locking mechanism and method for anchor cables of super-statically indeterminate equal-strength support. The mating surface of the sleeve and the cylinder bowl is a conical surface, and the lock sleeve is composed of four-petal cone blocks. Put the cylinder bowl, lock sleeve, and spring of the anchor cable locking mechanism on the anchor cable fixed by the stirring drug coil in sequence, and pull the anchor cable splits compressed in the four-petal cone block lock sleeve in four directions. , connected with other anchor rods or anchor cables in the support, when the anchor cable is broken in the high-stress area, the anchor cable supported in the rock formation will be tightly wedged by the locking sleeve set in the bowl, It ensures that the roof will not fall away from the layer, greatly improves the support force, and effectively guarantees the safety of underground personnel. It has a simple structure, easy manufacturing process, convenient use, reliable performance, and good effect. It has a wide range of applications for deep support. practicality.

Description

An anchor cable locking mechanism and method for super-statically indeterminate equal-strength support

technical field

The invention relates to the field of rock formation support, in particular to an anchor cable locking mechanism and method for super-statically indefinite equal-strength support suitable for high-stress areas of rock formations.

Background technique

With the deepening of coal mines, the ground pressure and mine pressure increase sharply. In many high-stress areas, the failure of ordinary anchor net cable support occurs, and even the support anchor rod is cut or the anchor cable is partially broken. The event that the roof separated from the layer collapsed and injured people. In order to solve the occurrence of such incidents and ensure the safety of underground workers, it is necessary to solve the problem of roof separation and collapse due to the drop of anchor cable pretension caused by partial breakage of anchor cables in support.

Contents of the invention

The purpose of the present invention is to overcome the problems existing in the prior art, and provide a super statically indeterminate iso-strong support locking mechanism and method that is simple in structure, convenient to use, reliable in performance, and capable of effectively supporting roadways in high-stress areas .

The anchor cable locking mechanism for super-static and equal-strength support of the present invention consists of a cylinder bowl with a disc-shaped bottom, a lock sleeve arranged in the cylinder bowl to clamp the anchor cable composed of multiple strands of steel wires, and a lock sleeve arranged below the lock sleeve. It is made of spring, the mating surface of the lock sleeve and the cylinder bowl is a conical surface, and the lock sleeve is composed of four-petal cone blocks.

The anchor cable locking method of the ultra-static and other strong support of the present invention: the cylinder bowl, the lock sleeve and the spring of the anchor cable locking mechanism are sequentially placed on the anchor cable fixed by the stirring drug roll, and the four-petal The strands of the anchor cable in the cone block lock sleeve are tensioned in four directions and connected with other anchor rods or anchor cables in the support.

Beneficial effects of the present invention: due to the use of the cylinder bowl, lock sleeve and spring support anchor cable locking mechanism at the rock formation opening where the anchor cable enters and exits, the anchor cable support force is greatly improved, especially when the anchor cable appears in the high stress area. When the cable is pulled off, because the lock sleeve in the barrel tightly wedges the anchor cable supported in the rock formation, it ensures that the roof will not fall away from the layer, effectively ensuring the safety of underground workers, and providing Timely reinforcement of anchor cable support provides a favorable opportunity. The structure is reasonable and simple, the manufacturing process is easy, the use is convenient, the performance is reliable, the effect is good, and it has wide practicability for deep support.

Description of drawings

Fig. 1 is a structural front view of the present invention.

Fig. 2 is a top view of the structure of the present invention.

Among the figure: 1-anchor cable, 2-tube bowl, 3-lock sleeve, 4-spring, 5-cylindrical hole, 6-tapered hole.

Detailed ways

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1, the supporting anchor cable locking mechanism of the present invention is mainly composed of a bowl 2 with a disc-shaped bottom, a lock sleeve 3 and a spring 4 clamping an anchor cable 1 composed of multiple strands of steel wire, and has a disc-shaped bottom. There is a cylindrical hole 5 in the through hole at the bottom of the cylindrical bowl 2, and a tapered hole 6 is arranged above the cylindrical hole 5. The lock sleeve 3 is composed of four-petal cone blocks. The tapered hole 6 in the 2 matches, and the spring 4 is located in the cylindrical hole 5 in the cylinder bowl 2, and pushes against the bottom of the lock sleeve 3.

The supporting anchor cable locking method of the present invention: After the anchor cable 1 and the drug coil are pushed into the drilled hole by the anchor cable drill rig and the stirring is completed, the cylinder bowl 2, the lock sleeve 3, and the spring of the anchor cable locking mechanism 4. Put it on the anchor cable 1 which has been fixed by the stirring drug coil in turn, and the bowl 2 with a disc-shaped bottom is clamped at the entrance of the rock formation. According to the current regulations, start to apply the pre-tightening force to the specified value, and then press it on the four-petal The steel wire strands of the anchor cable 1 composed of multiple steel wires in the cone block lock sleeve 3 are split into four parts, and each part of the steel wire is close to the exposed chassis of the barrel bowl 2 and stretched in four directions to ensure that each direction is stretched The steel wires are all arranged in the middle part of the lock sleeve 3 blocks, and then connected and fastened with other adjacent anchor cables or anchor rods to form a support net.

Claims (2)

1. A super-static and other strong support anchor cable locking mechanism is characterized in that: the mechanism is mainly composed of a cylinder bowl (2) at the bottom of a disc, a lock for clamping an anchor cable (1) composed of multiple strands of steel wire. Sleeve (3) and spring (4) are formed, and cylindrical hole (5) is arranged in the bottom through hole of the cylinder bowl (2) that is disc-shaped bottom, and tapered hole (6) is arranged on the top of cylindrical hole (5). (3) It is composed of four-petal cone blocks. The lock sleeve (3) is set in the bowl (2) to match the tapered hole (6) in the bowl (2). The spring (4) is set in the bowl (2). In the cylindrical hole (5) in the bowl (2), it is pushed against the bottom of the lock sleeve (3). 2. A method for locking an anchor cable of super-statically indeterminate equal-strength support as claimed in claim 1, characterized in that: the anchor cable (1) and the drug roll are pushed into the drilled anchor cable drill with an anchor cable drilling rig. In the hole and after the stirring is completed, put the cylinder bowl (2), lock sleeve (3) and spring (4) of the anchor cable locking mechanism on the anchor cable (1) that has been fixed by the stirring drug coil in sequence, forming a disk. The cylindrical bowl (2) with a shaped bottom is clamped at the entrance of the rock formation, and the pre-tightening force is applied to the specified value according to the current regulations, and then the anchor composed of multi-strand steel wires pressed in the four-petal cone block lock sleeve (3) The steel wire strands of the cable (1) are split into four parts, and the steel wires of each part are close to the exposed chassis of the barrel bowl (2) and stretched in four directions to ensure that the steel wires stretched in each direction are located in the lock sleeve (3) The middle part of the block is then connected and fastened with other adjacent anchor cables or anchor rods to form a support net.

Images