Novel hard shell anchoring agent

Abstract

The invention relates to an anchoring agent for coal mine roadway support, and specifically discloses a novel hard shell anchoring agent. The novel hard shell anchoring agent solves the problem that the anchoring agent is easy to break, deviate and slip in installation. The novel hard shell anchoring agent comprises a cylindrical outer shell and a cylindrical inner shell, wherein an end plate is arranged at the upper end of the cylindrical outer shell, and an opening is formed at the lower end; a division plate is arranged in the inner cavity of the cylindrical outer shell; the division plate divides the inner cavity of the cylindrical outer shell into an upper main cavity and a lower secondary cavity, and the upper main cavity is longer than the lower secondary cavity; external threads are formed on the outer surface of the upper part of the cylindrical outer shell; internal threads are formed on the inner surface of the lower secondary cavity; openings are respectively formed at the upper and lower ends of the cylindrical inner shell; the upper end of the cylindrical inner shell is vertically fixed in the center of the lower surface of the end plate; the lower end of the cylindrical inner shell is vertically fixed in the center of the upper surface of the division plate; the inner cavity of the cylindrical inner shell is filled with a curing agent; and daub fills the gap between the cylindrical outer shell and the cylindrical inner shell. The novel hard shell anchoring agent is suitable for coal mine roadway support.

Description

technical field

[0001] The invention relates to an anchoring agent in coal mine roadway support, in particular to a novel hard-shell anchoring agent. Background technique

[0002] In the process of coal mining, the overlying strata will exert great pressure on the roadway, making it difficult to ensure safe and efficient production by relying on its own strength. Therefore, it is very necessary to support the roadway. At present, using bolts and anchor cables to support the roadway has become a commonly used roadway support method in coal mines. The specific method is: firstly drill holes on the roof, and then install the anchoring agent (the installation of the anchoring agent refers to: first The anchoring agent is pushed to the bottom of the borehole, and then the anchoring agent is crushed), thereby anchoring the anchor rod or anchor cable to the roof. The anchoring agent is generally separated from the cement and the curing agent by a polyester film into a two-componen...

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