煤体注浆材料优选及加固煤体单轴压缩试验

发布时间：2018-02-21 01:50

本文关键词： 固结煤体瓦斯抽采浆液性能力学性质渗透率　出处：《煤矿安全》2017年02期 　论文类型：期刊论文

【摘要】：为了在瓦斯抽采钻孔施工过程中对帷幕注浆加固材料进行优选,通过黏度和抗压强度,确定高延性水泥基复合材料的基本水灰比。采用粉煤灰、微硅粉以及聚乙烯醇作为掺合剂,研究了不同掺合剂配比对注浆加固材料性能的影响,包括浆液黏度、凝结时间及固结煤体渗透率和抗压强度。试验结果表明:高延性水泥基复合材料的基本水灰比为0.75∶1;水灰比对注浆材料的黏度和抗压强度影响显著,注浆材料黏度与固结煤体渗透率、抗压强度、弹性模量受掺合剂配比影响明显;与其它体系相比,体系1(粉煤灰、微硅粉以及聚乙烯配比分别为(5%、15%、3%)注浆材料黏度适中,固结煤体渗透率较低,抗压强度最高,其注浆效果最优。
[Abstract]:The basic water-cement ratio of high ductile cement matrix composites is determined by viscosity and compressive strength in order to select the reinforcement materials for curtain grouting during the construction of gas drainage drilling. Fly ash is used. The effects of different blending ratio of silica powder and polyvinyl alcohol on the properties of grouting reinforcement materials, including the viscosity of slurry, were studied. Setting time, permeability and compressive strength of consolidated coal. The experimental results show that the basic water-cement ratio of high ductile cement-based composites is 0.75: 1, and the water-cement ratio has a significant effect on the viscosity and compressive strength of grouting materials. The viscosity of grouting materials and the permeability of consolidated coal body, compressive strength and modulus of elasticity are obviously affected by the ratio of admixture; compared with other systems, system 1 (fly ash, silica fume and polyethylene ratio is 5% and 15%), the viscosity of grouting material is moderate, The permeability of consolidated coal is low, the compressive strength is the highest, and the grouting effect is the best.
【作者单位】：黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室;黑龙江科技大学安全工程学院;瓦斯等烃气输运管网安全基础研究国家级专业中心实验室;黑龙江科技大学建筑工程学院;
【基金】：国家自然科学基金资助项目(51104062) 黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室开放基金资助项目(F2313-07) 黑龙江科技大学研究生创新科研资助项目(YJSCX2015-105HKD)
【分类号】：TD712.6

【相似文献】