Coal and rock mass fracture grouting material suitable for long-distance transportation and preparation method of coal and rock mass fracture grouting material

By optimizing the ratio of cement, fly ash, and water, a coal and rock mass fracture grouting material suitable for long-distance transportation was prepared. This solved the problems of limited application range and high cost of existing grouting materials, and realized a low-viscosity, long-setting-time, and low-cost grouting material to meet engineering needs.

CN122079550APending Publication Date: 2026-05-26安徽省煤田地质局第三勘探队 +1
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Patent Information

Application Number
CN202610295216.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-11
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In the existing technology, the application scope of high-volume fly ash-cement mixed grouting materials is not wide, and there is a lack of regulations and standards, making it difficult to achieve the best balance between grouting consolidation effect and low cost in shallow coal and rock mass fracture grouting projects.

Method used

By optimizing the ratio of cement, fly ash, and water, a low-viscosity, long-setting-time, and low-cost grouting material was prepared. The specific ratio is cement:fly ash:water = 2:8:1, fly ash particle size ≤ 5mm, PO 42.5 ordinary Portland cement is used, water supply capacity ≥ 40m3/h, initial setting time is 27~28h, final setting time is 38~39h, and 28-day unconfined compressive strength > 1MPa.

Benefits of technology

It enables long-distance transportation of low-viscosity slurry, avoids the risk of pipe blockage, reduces project costs, and achieves a compressive strength of 1.03 MPa within 28 days, meeting reinforcement requirements and solving the environmental pollution problem caused by fly ash stockpiling.

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Abstract

The invention belongs to the technical field of mine engineering and rock-soil reinforcement, and discloses a coal-rock mass fracture grouting material suitable for long-distance transportation and a preparation method thereof. The ratio of the cement to the fly ash to the water is 2: 8: 10, and experiments prove that the performance requirement of the grouting material is met, and the grouting strength is gt; the engineering requirements are met under 1MPa, the requirement of long-distance transportation is met under the initial setting time of 27h and 10min, meanwhile, 80% of cement is replaced with waste fly ash of a power plant in terms of engineering cost, the cost of the grouting material is greatly reduced, the problem of environmental pollution caused by stacking of fly ash is solved, and the construction cost is reduced. The method can be used as a preferred proportioning scheme for a caving zone direct covering coal mining ground grouting reinforcement roof project.
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