古书院矿似膏体充填材料配比及其力学性能

发布时间：2018-02-01 00:57

本文关键词： 充填材料似膏体正交试验力学性能极差分析法泌水率　出处：《煤矿安全》2017年12期 　论文类型：期刊论文

【摘要】：针对目前晋煤集团古书院煤矿"三下"压煤占据较大比例的现状,调查分析晋城市周边潜在的充填原材料,并对原材料进行成分测试,确定煤矸石、粉煤灰作为似膏体充填材料的主料,矿粉、生石灰、石膏为胶凝材料;其次,进行三因素三水平正交试验,采用极差分析法对试验结果进行选择,确定了似膏体材料主料的配比,即煤矸石∶粉煤灰=2∶1。接着研究了胶凝材料的配比,测试了材料的泌水率并进行了配比优化。最后,进行室外大体积固结试验,钻孔取芯加工成标准圆柱试样,测试试样单轴、破坏特征、三轴力学性能。
[Abstract]:In view of the present situation that Guyuan Coal Mine of Jin Coal Group occupies a large proportion of the coal, the potential filling raw materials around Jincheng are investigated and analyzed, and the composition of the raw materials is tested to determine the coal gangue. Fly ash is the main material of paste filling material. Mineral powder, quicklime and gypsum are cementing materials. Secondly, the orthogonal experiment of three factors and three levels was carried out, the test results were selected by the range analysis method, and the proportion of the main material of the paste like material was determined. That is coal gangue: fly ash 2: 1. Then the ratio of gelling material was studied, the bleeding rate of the material was tested and the proportion was optimized. Finally, the outside consolidation test was carried out. The standard cylindrical specimen was made by drilling and coring, and the uniaxial, failure and triaxial mechanical properties of the specimen were tested.
【作者单位】：河南理工大学能源科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金资助项目(50908076,51274088)
【分类号】：TD823.7
【正文快照】： 充填开采是解决煤炭开采过程中生态环境保护、延长矿井服务年限、提高煤炭采出率最有效的方法之一[1-2]。目前,我国常用的充填材料主要包含固体废弃物干式充填材料、膏体充填材料、似膏体充填材料以及超高水充填材料[3-5]等。充填开采的成本主要取决于充填材料成本和充填工艺,

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