关键词: 风积沙, 似膏体充填材料, 工业应用

Abstract: In order to use aeolian sand as stowing material in Northwest area and localize the stowing material for mine，effect of aeolian sand as filling aggregate on stowing materials was studied.The experimental results indicate:With the increase in dosage of aeolian sand，the strength and the stone rate has no obvious change for the stowing materials，the cost of stowing materials has been reduced; with the increase in dosage of auxiliary gelatinization material，the 7 d strength has no obvious change for the stowing materials，the 28d strength and stone rate of material increased gradually，the density of material decreased gradually; the apparent viscosity and shear stress gradually raised with the increase of the concentration for the slurry; the auxiliary materials provide appropriate conditions of alkalinity and temperature for stowing slurry，exudation water is significantly reduced and the hardening rate of stowing body is obviously increased. The industrialtests indicated that,with w(cement)∶w(accessoriesl)∶w(fly ash)∶w(aeolian sand)=1∶1.6∶10∶12,slurry concentration is 70%,the average stowing body increased to 4.35 MPa in 14 days and long-term strength above 5 MPa for stowing mine working face; the filling rate achieved 98.5% with horizontal coal seam，the stability of strength can meet the need of the pressure from overlying strata.Ettringite form a dense network structure in stowing body，it can promote the early strength of the stowing body increased rapidly，numerous hydration products and flocculent gel cemented and wrapped the aeolian sand particles into the overall dense network structure，that ensure long-term strength stable for stowing body.The experiment results of aeolian sand paste-like stowing material not only solved the imbalance of supply between demand of stowing materials but also the imbalance of stowing cost and mining benefit.

Key words: Aeolian sand, Paste-like stowing material, Industry application