Loess composite solidifying agent-based coal mine filling material and preparation method thereof

By using a loess composite curing agent, combined with polyacrylate emulsion and optimized binder, the problems of loess collapse and poor fluidity were solved, the mechanical properties and durability of coal mine backfill materials were improved, and the cost was reduced.

CN120058333BActive Publication Date: 2025-10-21江河安澜工程咨询有限公司
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Patent Information

Application Number
CN202510282997.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-11
Publication Date
2025-10-21
Estimated Expiration
2045-03-11

AI Technical Summary

Technical Problem

Loess, a traditional coal mine backfill material, has poor slumpability and fluidity, resulting in insufficient mechanical properties and durability. In addition, it requires a large amount of fly ash, leading to high costs.

Method used

A composite solidifying agent for loess is used, which introduces polyacrylate emulsion and optimized binder components, including sulfoaluminate cement, ammonium dihydrogen phosphate, desulfurized gypsum, quicklime, water glass and water-quenched slag, to form a composite material to improve the fluidity and solidification of loess and increase its compressive strength.

Benefits of technology

It improves the fluidity and compressive strength of coal mine backfill materials, reduces the amount of fly ash used, reduces costs, and improves durability and compactness.

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Abstract

The application discloses a coal mine filling material based on loess composite curing agent and a preparation method thereof, and relates to the technical field of coal mine filling materials. The raw materials of the coal mine filling material comprise the following components in terms of weight fractions: 58-62 parts of loess composite curing agent and 100 parts of polyacrylate emulsion; the raw materials of the loess composite curing agent comprise the following components in terms of weight fractions: 25-28 parts of loess composite material, 20-23 parts of fly ash and 10-12 parts of cementing material. The loess composite material is composed of conventional loess, calcium-increased loess and isocyanate modified loess at a mass ratio of 2-3:1:1. The raw materials of the cementing material comprise the following components in terms of weight fractions: 2-2.5 parts of sulphoaluminate cement, 0.5-1 part of ammonium dihydrogen phosphate, 1-1.5 parts of desulfurization gypsum, 0.5-1 part of quicklime, 1-2 parts of water glass and 4-5 parts of water-quenched slag. The coal mine filling material has excellent compressive strength.
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Citation Information

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