Self-propelled anchor cable based on fracture water early warning device

Abstract

The invention relates to a self-propelled anchor cable based on a fracture water early warning device, and belongs to the field of civil engineering, which is a supporting device and is mainly applied to complex geology of rock stratum fracture development. The self-propelled anchor cable comprises a self-propelled anchor cable and a fracture water early warning device, wherein the self-propelled anchor cable and the fracture water early warning device are connected with each other, the self-propelled anchor cable is connected with the fracture water early warning device through a drainage wire, a hollow alloy drill bit is arranged at the head of the self-propelled anchor cable, water inlets are formed in the outer side and the top of the hollow alloy drill bit, self-propelled threads are arranged on the outer side of a rod body, grouting holes are evenly distributed in the rod body, the drainage wire is arranged on the inner side of the rod body, one end of the drainage wire is arranged in the hollow alloy drill bit, the other end of the drainage wire penetrates through a stop-grouting plug and then is connected with the fracture water early warning device, the self-propelled anchor cable adopts a connecting sleeve to lengthen the rod body, the tail of the rod body is composed of a base plate, a nut, the stop-grouting plug and a slurry blocking plug, the early warning device is composed of early warning test paper and a waterproof protective sleeve, and the early warning test paper is arranged in the waterproof protective sleeve and has the effect of early warning fracture water to flow into an anchor cable anchoring stratum along with fracture development. The self-propelled anchor cable and the early warning device have the advantages of the simple structure, good supporting effect, convenience in construction, high construction speed, low economic cost and simple construction step, the working time is shortened, and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the field of civil engineering, in particular to a self-advancing anchor cable based on a fissure water early warning device. Background technique [0002] The anchor cable is the most basic part of roadway support in contemporary coal mines. It reinforces the surrounding rocks of the roadway so that the surrounding rocks can support themselves. Anchor cables are not only used in mines, but also in engineering technology for main body reinforcement of slopes, tunnels and dams. The anchor cable is a tensile member that goes deep into the ground. One end of it is connected to the engineering structure, and the other end goes deep into the ground. The whole anchor cable is divided into a free section and an anchor section. The free section refers to the tension at the head of the anchor cable. area, whose function is to apply prestress to the anchor cable. my country's anchor cable support technology developed rapidly in the 199...

AI Technical Summary

Problems solved by technology

In the coal industry, when the roadway is located below the aquifer, with the excavation of the coal seam, the cracks in the rock formation will develop, and the water in the aquifer rock will flow along the cracks, resulting in two phenomena. The penetration, erosion and stripping effect of the hole will damage the hole wall, the anchor cable and the surrounding rock will fail to anchor, the anchor cable will fall off, and the surrounding rock will collapse out of control, causing safety accidents; When entering the non-water-bearing rock formation, the strength of the non-water-bearing rock formation will be reduced and phenomena such as expansion, hydrolysis or mudification will occur, resulting in a large amount of deformation and movement of the surrounding rock, resulting in safety accidents.

At present, ordinary self-advancing anchor cables are often used in the anchorage of fractured rock formations, which cannot provide early warning for the development of fractured water.

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