Novel underground mine gel emulsion explosive and preparation method thereof

A technology of emulsion explosives and underground mines, which is applied in the field of explosives, can solve the problems of poor fluidity, affect the pumping effect, and reduce the viscosity of emulsion explosives, achieve stable physical and chemical properties, facilitate automatic pumping, and improve fluidity.

Active Publication Date: 2018-10-12
ANHUI UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The powdery emulsion explosive is loaded by pneumatic mechanical charging. Since the powder is not viscous, the phenomenon of powder return is serious when it is loaded upward to the blast hole. The actual amount of charge in the blast hole is far less than the predetermined value, which affects the blasting effect; moreover, the powder that falls back from the blast hole seriously pollutes the working environment, and the working flour is dusty, which seriously damages the physical and mental health of the staff.
For ordinary colloidal emulsion explosives, the viscosity of latex matrix will increase rapidly after sensitization and the fluidity is poor, and its pumping problem has not been effectively solved. The

Method used

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  • Novel underground mine gel emulsion explosive and preparation method thereof

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Embodiment 1

[0031] New colloidal emulsion explosive for underground mining: the colloidal emulsion explosive for underground mining contains 73 parts of ammonium nitrate, 5 parts of sodium nitrate, 5 parts of composite oil phase, 10 parts of water, NaNO 2 0.2 parts, 3 parts of sodium lignosulfonate, 3 parts of sodium polyacrylate, and 0.8 parts of polymethacrylate.

[0032] The preparation method of described novel colloidal emulsion explosive for underground mining comprises the following steps:

[0033] St1: Coating of sodium polyacrylate: Microcapsule method is used to cover sodium polyacrylate with microcapsules made of polymethacrylate, and the average particle size of the microcapsules is controlled at 10-45 microns.

[0034] St2: Preparation of latex matrix: Mix and stir ammonium nitrate, sodium nitrate, composite oil phase, water and sodium lignosulfonate in proportion, and control the production process conditions to prepare a latex matrix with good fluidity.

[0035] St3: Prepa...

Embodiment 2

[0040] New colloidal emulsion explosive for underground mining: the colloidal emulsion explosive for underground mining contains 72 parts of ammonium nitrate, 5 parts of sodium nitrate, 5 parts of composite oil phase, 9 parts of water, 1.2 parts of resin microspheres, sodium polynaphthaldehyde sulfonate 4 parts, Tianqing glue 3 parts, polylaurolactam 0.8 parts.

[0041] The preparation method of described novel colloidal emulsion explosive for underground mining comprises the following steps:

[0042] St1: Coating of Tianqing gum: Microcapsule method is used to coat Tianqing gum with microcapsules made of polylaurolactam, and the average particle size of the microcapsules is controlled at 10-45 microns.

[0043] St2: Preparation of latex matrix: Mix and stir ammonium nitrate, sodium nitrate, composite oil phase, water and sodium polynaphthalene sulfonate according to the mass ratio, and control the production process conditions to prepare a latex matrix with good fluidity.

...

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Abstract

Disclosed is a novel underground mine gel emulsion explosive. The explosive is mainly prepared from ammonia nitrate,sodium nitrate,a compound oil phase,water,sensitizer,a viscosity reducer,a thickening agent and a thickening agent wrapping film material. The viscosity reducer is used for reducing the viscosity of the emulsion explosive,pumping resistance is lowered,and it is ensured that the emulsion explosive can be smoothly pumped into a gun hole. Meanwhile,the thickening agent wrapped by micro-capsules is added into the emulsion explosive,in the pumping and spraying charging process of thethickening agent wrapped by micro-capsules,due to the extrusion,friction and spraying collision effects,the micro-capsules are damaged,enable the thickening agent to be exposed,and react with water inthe emulsion explosive,and the viscosity of the underground mine gel emulsion explosive after the explosive reaches the gun hole is enhanced,so that the problem that charging and recharging of the hole are serious on an underground mine is effectively solved. Meanwhile the underground mine gel emulsion explosive is good in detonation performance,and the requirement for storage stability is met.

Description

technical field [0001] The invention relates to an explosive, more specifically a colloidal emulsion explosive for underground mines, in particular to a colloidal emulsion explosive for underground mines which utilizes microcapsule technology to realize thickening in holes and a preparation method thereof. Background technique [0002] Due to the pressure of environmental protection and sustainable development, the mining trend of my country's mineral resources is shifting from open pit to underground, and from underground to deep mining. In the mining and blasting of underground mines, powdery emulsion explosives and gelatinous emulsion explosives are mainly used. The powdery emulsion explosive is loaded by pneumatic mechanical charging. Since the powder is not viscous, the phenomenon of powder return is serious when it is loaded upward to the blast hole. The actual charge in the blast hole is far less than the predetermined value, which affects the blasting effect; moreov...

Claims

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Application Information

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IPC IPC(8): C06B31/28C06B21/00C06B23/00
CPCC06B21/0008C06B23/001C06B23/009C06B31/285
Inventor 程扬帆陶臣刘春晓茆文胜蒋光波张士绪
Owner ANHUI UNIV OF SCI & TECH
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