Self - drilling grease bolt

一、Product overview

Complex geological conditions such as soft surrounding rock and high stress are common in deep mining of coal mine, which bring great difficulties to roadway support. The support effect of ordinary end anchor bolt is poor, and it is difficult to achieve the expected support effect. Self-drilling grease injection bolt support can realize full-length anchoring, simplify the working procedure, and the operation is simple, can significantly improve the strength of weak and broken surrounding rock, which is a new type of bolt developed by our company for complex geological conditions.

二、Scope of application

Self-drilling fat injection bolt is mainly used for excavation support or repair and reinforcement of mine roadway, blockchamber and crossover points under complex and difficult conditions such as soft rock, fault broken zone and high stress area. It can also be used for reinforcement and reinforcement of geotechnical engineering such as tunnel and slope. It is especially suitable for geological conditions where surrounding rock is broken and common resin roll is difficult to be normally put into boreholes.

三、Product characteristics

The bar body with new hollow structure realizes the function of pressure grouting

The anchor bolt body can be full length wrapped in grouting material, prevent the corrosion of the bolt body, prolong the supporting time

The physical and mechanical properties and elongation of the rod are improved by hot rolling

Large penetration range of grouting liquid, strong anchoring force, simple and convenient installation; The high pressure grouting can make the grout penetrate into the cracks in the rock strata and anchor the broken rock mass into a whole, forming deep three-dimensional anchoring

四、 Product specifications and models

五、 Product technical parameters

Self-drilling grease injection anchor bolt is used to reinforce broken surrounding rock. By integrating anchoring and grease injection, loose structure of surrounding rock can be changed, cohesive force and internal friction Angle can be improved, cracks can be closed, water erosion can be prevented, and strength of rock mass can be significantly improved. Grease injection reinforcement can provide reliable strength foundation for the wrong rod. To give full play to the anchoring effect of the bolt on the soft and broken surrounding rock: The self-drilling grease injection bolt is adopted to support the roadway, which has a particularly prominent reinforcement effect on the fracture development and breakage of the surrounding rock.

六、Product precautions

1. Self-drilling grease injection bolt products are generally made of 5 rods in a group, which are bound firmly and hung with a qualification certificate. It can also be packed according to the requirements of the supply contract.

2, the rod body is strictly prohibited with burr, shall not be contaminated with oil, screw locking section should take protection and anti-rust measures.

3. Because of the resin fixing agent in the body of the rod, the storage place of the self-drilling grease injection anchor rod shall not be near the fire source and heat source, and it shall be used up within the validity period of the resin cartridge. The expired resin cartridge shall not be used and must be replaced.

4. Self-drilling grease bolt products shall not be thrown in the process of transportation and loading and unloading. When stored, they should be placed in a dry place and shall not be stored in corrosion and damp environment to prevent corrosion.

5, underground handling self-drilling grease bolt, attention should be paid to avoid bump, so as not to damage the thread and rod deformation, resulting in installation, grouting, pre-tightening difficulties.