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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

Inactive Publication Date: 2019-10-22
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a safe static breaking agent for coal mines in order to solve the shortcomings that the mixer cannot be used in the mine, and the construction distance is too long, which causes the breaking agent to condense first.

Method used

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  • Safe static breaking agent for coal mines
  • Safe static breaking agent for coal mines
  • Safe static breaking agent for coal mines

Examples

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preparation example Construction

[0028] The preparation method of the special safe static crushing agent for coal mines, firstly, mix heavy calcium powder and silicon oxide evenly, add appropriate amount of water to make a cake, put it into a sintering furnace and burn it, and then grind the medicine cake into a powder of about 200 meshes, and The powder is packed into a prefabricated packaging cylinder and packaged into a drug column, weighed and packaged in a plastic bag for moisture-proof storage.

[0029] The packing column mainly includes a paper body, a base, a paper cover, and a grid, and the material is a paper product that has water permeability and is not soft when soaked in water. The length of the paper body is determined by the length of the hole, generally 10mm to 20mm. The grid is placed inside the grain. The structure adopts eight or four petals, which is determined by the diameter of the grain. The diameter of the grain is related to the actual hole size.

[0030] The method of using the spec...

Embodiment 1

[0033] The special safe static breaker for coal mines of this implementation example, its sintering raw materials are made of the following raw materials in parts by weight: heavy calcium powder 1.74Kg, silicon oxide 0.06Kg, iron oxide 0.08Kg, aluminum oxide 0.13Kg. The packing diameter of the powder column is 38mm.

[0034] The preparation method steps of the safety static crushing agent special for coal mine of this embodiment example are as follows: First, mix the heavy calcium powder and silicon oxide together and add an appropriate amount of water to make a cake, put it into a sintering furnace and burn it, and then grind the medicine cake into 200 Pack the powder into a prefabricated packaging cylinder to form a powder, weigh it and put it in a plastic bag, and store it away from moisture.

[0035] In this example, the method of using the special safe static crushing agent for coal mines is firstly to mix heavy calcium powder and additives evenly, add appropriate amount ...

Embodiment 2

[0037] The special safe static breaking agent for coal mines of this embodiment, its sintering raw material is to be made by the raw material of following parts by weight: heavy calcium powder 13.05Kg, silicon oxide 0.45Kg, iron oxide 0.6Kg, aluminum oxide 0.9Kg. The packing diameter of the powder column is 34mm.

[0038] The steps of preparation and use of the safe static crushing agent for coal mines in this implementation example are as follows: First, mix the heavy calcium powder and additives evenly, add an appropriate amount of water to make a cake, put it into a sintering furnace and burn it at 1400 ° C to 1500 ° C , and then grind the medicine cake into a powder of about 200 meshes, pack the powder into a prefabricated packaging cylinder to form a medicine column, weigh it and put it in a plastic bag, and store it away from moisture. When in use, soak the powder column with an appropriate amount of water, pound it into the drilled hole after reaching the required water...

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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.

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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Application Information

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IPC IPC(8): C04B28/18F42B3/00E21C37/04
CPCC04B28/186E21C37/04F42B3/00C04B14/28C04B14/06C04B14/308C04B14/303C04B22/002
Inventor 于会军陈卫东吴培文徐国庆郭庆勇邢政
Owner HARBIN ENG UNIV
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