摘要:
以新阳矿矸石、 粉煤灰高浓度胶结充填料浆为研究对象,建立了充填料浆矸石颗粒悬浮态力学模型，分析了矸石颗粒悬浮状态的影响因素,认为调节高浓度料浆的塑性黏度和屈服应力是改善矸石颗粒悬浮性能、调节矸石颗粒悬浮状态最有效的手段;料浆实际配置中添加的悬浮剂正是通过提高料浆塑性黏度来提升矸石颗粒悬浮性,达到阻滞矸石下沉的目的。研究结果表明，悬浮剂使用量要适当,添加过多会影响料浆流动性,造成料浆输送阻力过大。新阳矿矸石、粉煤灰高浓度料浆黏度系数介于3. 24~3.40Pa.s,屈服应力介于107.9~111.9 Pa时，,矸石颗粒基本处于悬浮状态,输送性较好。
Abstract:
This paper focus on the Xinyang coal gangue fly ash high concentration backfill slurry characteristics. The mechanic model was established to research the coal gangue suspension within the high concentration slurry and theoretical analysis was carried out to study the potential influence factors to the coal gangue suspension.The results show the most significant method to enhance the coal gangue suspension is to improve plastic viscosity and yield stress of the high concentration slurry.The suspending agent that employed in the slurry configuration is to enhance the slurry plastic viscosity , resulting in improving the coal gangue suspension characteristic and decreasing the coal gangue fall downward speed.'The results reveal that the excessive amount of additive less the fluidity of the slurry , increase the slurry pipe transportation resistance.Coal gangue remains suspension characteristic in Xinyang high concentration slurry when the slurry viscosity range from 3.24 to 3.40 Pa · s while the slurry yield stress is between 107.9 to 111.9 Pa.At this level of rheology characteristics , the slurry is adequate to transport.
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