Safe static breaking agent for coal mines

A static breaking agent and a safe technology, applied in blasting barrels, discharge machinery, attacking equipment, etc., can solve problems such as the first condensation of the breaking agent, the inability to use the mixer, and the long construction distance, etc., to achieve the effect of slowing down the hydration reaction
CN110357559AInactive Publication Date: 2019-10-22HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN ENG UNIV
Publication Date
2019-10-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a safe static breaking agent for coal mines. The preparation method comprises: adding the heavy calcium powder and an additive to water, mixing uniformly, and firing to form anagent cake, wherein the content of the heavy calcium powder is 85-95%, and the additive is SiO2, Fe2O3 and Al2O3; and grinding the agent cake into powder, loading the powder into a cylinder, and packaging to form an agent column so as to obtain the safe static breaking agent for coal mines. According to the present invention, the safe static breaking agent, ie., the agent column, is pounded into the drilling hole after soaking for a sufficient time, the agent column can be subjected to condensing hardening swelling in the hole, and can generate pressure to the hole wall to achieve the tensilestrength of the object breaking so as to break the object; and the safe static breaking agent can be produced in advance at the factory, and then be directly used under the mine without a stirrer.
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Description

technical field

[0001] The invention relates to a static breaking agent, in particular to a safe static breaking agent for coal mines, which belongs to the field of engineering blasting. Background technique

[0002] The safe static breaker for coal mines is an expansive powder material with finished product packaging. Its main component is calcium oxide, which is a non-toxic, non-combustible and safe expansive powder. The external material is a paper material with certain strength and water permeability. The interior features grilles of the same material. Compared with explosives, the reaction speed is moderate, the growth rate of expansion pressure is uniform, the energy generation is low, and the reaction temperature is low. It is a safe and controllable crushing method. However, in coal mining, the quality of the breaking agent is affected by the site conditions and the construction methods of the workers, and the underground operation space is limited, so it is difficu...

Claims

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