突出型煤配比及力学特性实验研究

Experimental research on the proportion and mechanical properties of outburst briquette

为了深入探讨突出煤相似材料的配比及制作工艺,选择煤粉、黏结剂和水作为制作突出型煤的原料,分析黏结剂种类、成型压力对突出型煤力学特性的影响;以煤粉与水泥质量比、水灰比为控制因素设计正交配比试验,分析突出型煤单轴抗压强度和弹性模量的变化规律。实验结果表明:黏结剂种类和成型压力对型煤单轴抗压强度的影响较大,制作较高强度型煤时优选高强度硅酸盐水泥为黏结剂、成型压力为20 MPa;型煤的单轴抗压强度和弹性模量随着煤粉与水泥质量比的增大而减小,随着水灰比的增大而增大,并且两者都呈现较好的线性关系。基于实验数据得到突出型煤配比的多元线性回归经验方程,可为突出煤相似材料的制作提供参考。

In order to explore the ratio and manufacturing process of similar materials of outburst coal,coal fines,binder and water were selected as raw materials for the production of outburst briquettes,and the effects of the type of binder and molding pressure on the mechanical properties of outburst briquette were analyzed;based on the mass ratio and water cement ratio of coal fines and cement as the control factors,the orthogonal test was designed to analyze the uniaxial compressive strength and elastic modulus of outburst briquette.The results show that the type of binder and the molding pressure have a greater effect on the uniaxial compressive strength of briquette,the high-strength portland cement is preferably used as the cementing agent,and the molding pressure is 20 MPa when making high-strength briquette;the uniaxial compressive strength and elastic modulus of briquette decrease with the increase of the mass ratio of coal fines and cement,and increase with the increase of water cement ratio,and both show a good linear relationship.Based on the experimental data,the empirical equation of multiple linear regression of outburst briquette ratio is obtained,which can provide reference for the manufacture of similar materials of outburst coal.