ArticleScientific reports2026
Comprehensive enhancement of blasting performance and dust suppression in open-pit mines using a modified mudstone-fly ash geopolymer stemming material.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In response to the severe dust pollution, high operational cost, and short-lived effectiveness associated with conventional water-spraying dust suppression in large open-pit coal mines in grassland regions, this study proposes a source-control strategy grounded in solid waste reutilization. Drill cuttings of mudstone obtained from a representative overburden bench in the study area were utilized as the primary precursor, and a modified mudstone-fly ash geopolymer stemming material was developed via an alkali-activated rapid-setting process. The proposed material enables synergistic optimization of explosive energy confinement and dust suppression at the source during blasting operations.The dust-suppression mechanism of the proposed material was systematically investigated through mechanical performance testing, SEM, XRD, EDS, and smoothed particle hydrodynamics (SPH) simulations.Results show that optimal performance is obtained with a 30% accelerator concentration, a water-glass modulus of 1.50 mol/L at 40 g/L dosage, and a mixing time of 5 min, yielding good flowability and setting times within 30 min. Dynamic tests indicate superior toughness, with initiation and propagation fracture toughness of 0.80-2.41 MPa m
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