摘要
采用试验研究的方法,以新疆小红沟煤矿B3、B4煤层为研究对象,分析浸水耦合作用对煤体强度的影响。通过煤样天然含水率和吸水性的测定试验,研究煤样的含水率与浸水时间的相互关系;对浸水的煤样进行超声波检测试验及单轴压缩试验,分析浸水对煤岩体物理力学性质的影响。研究结果表明:煤样的含水率随着浸水时间的增加而增大,煤样在浸泡3 d后达到饱和状态含水率不再增大;随着浸水时间的增加煤样弹性模量、剪切模量和单轴抗压强度均减小;浸水后的煤岩体试件在第1次达到峰值强度后,还存在一定的承载能力,煤样的弹性降低塑性增强,同时伴随着强度的降低。
Taking the B3 and B4 coal seams of Xiaohonggou coal mine in Xinjiang as the research object, the influence of water immersion coupling on coal strength is analyzed. The relationship between water content and soaking time of coal samples was studied by measuring the natural water content and water absorption of coal samples, and the ultrasonic testing and uniaxial compression tests were carried out on the soaked coal samples, the influence of water immersion on physical and mechanical properties of coal and rock mass is analyzed. The results show that: the water content of coal samples increases with the increase of soaking time, and the water content of coal samples reaches saturation after soaking for 3 days with the increase of soaking time, the elastic modulus, shear modulus and uniaxial compressive strength of the specimen decrease;after the first peak strength of the specimen, there is still a certain bearing capacity, the elasticity of coal decreases and the plasticity increases, while the strength decreases.
作者
齐学元
邓广哲
QI Xueyuan;DENG Guangzhe(College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;School of Mines,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《煤炭技术》
CAS
北大核心
2022年第1期4-7,共4页
Coal Technology
基金
陕西省自然科学基础研究计划联合基金重点项目(2019JLP09)
内蒙古自治区自然科学基金项目(2020MS04009)
内蒙古工业大学科学研究项目(2016030092)。
关键词
浸水耦合
弹性模量
剪切模量
单轴抗压强度
试验分析
water immersion coupling
young's modulus
shear modulus
uniaxial compressive strength
experimental analysis
