基于正交试验的岩层相似材料配比研究  

Proportioning Test of Similar Materials in Strata Based on Orthogonal Test Design

作　　者：申建军 董瑞 任柏惠 潘瑶 SHEN Jian-jun;DONG Rui;REN Bai-hui;PAN Yao(College of Chemical Engineering and Safety,Binzhou University,Binzhou 256600,China;College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]滨州学院化工与安全学院,山东滨州256600 [2]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤炭技术》2020年第7期148-151,共4页Coal Technology

基　　金：国家自然科学基金资助项目(41807211);滨州学院博士科研启动基金项目(2017Y14);滨州学院2019年度大学生研究训练计划项目(SRTP2019234)。

摘　　要：为获得不同密度和力学强度的相似材料配比,选用石膏、碳酸钙及河砂3种原材料配置低强度相似材料,设置水量为1/7、1/9,测试了试件的物理力学等指标参数。试件的破坏形态主要呈现剪切破坏和劈裂破坏;水量为1/9和1/7的试件抗压强度分别为30.7~357.3 kPa、46.4~426.2 kPa,可以满足不同配比下岩层相似材料的力学要求。当水量为1/9时,碳酸钙:石膏质量比是影响相似材料单轴抗压强度的主要因素;当水量为1/7时,砂胶比是影响相似材料单轴抗压强度的主要因素。实验结果为煤层开采相似材料模拟试验提供了理论依据。In order to obtain the ratio of similar materials with different density and mechanical strength, gypsum, calcium carbonate and river sand were selected to configure similar materials with low strength. Water accounts for 1/7 and 1/9 of the total weight of the three materials, and the physical and mechanical parameters of the specimen were tested.The failure modes of specimens are mainly shear failure and splitting failure.The compressive strength of specimens with water content of 1/9 and1/7 ranged from 30.7 kPa to 357.3 kPa and 46.4 kPa to 426.2 kPa respectively, which could meet the mechanical requirements of similar materials in rock strata with different ratios. When the water content is 1/9, the mass ratio of calcium carbonate and gypsum is the main factor affecting the uniaxial compressive strength of similar materials. When the water content is 1/7, the ratio of sand to binder is the main factor affecting the uniaxial compressive strength of similar materials. The experimental results provide a theoretical basis for the simulation test of similar materials in coal mining.

关 键 词：相似材料 低强度 正交试验设计 极差分析 

分 类 号：TU45[建筑科学—岩土工程] TU50[建筑科学—土工工程]