煤岩层理结构对单轴力学特性影响研究  

Experimental Study on the Influence of High Temperature on the Mechanical Properties of Deep Coal and Rock

作　　者：郑光 ZHENG Guang(Shandong Energy Group Yankuang Energy Group Co.,Ltd.Shilawusu Coal Mine,Ordos 017299,China)

机构地区：[1]山东能源集团兖矿能源集团股份有限公司石拉乌素煤矿,内蒙古鄂尔多斯017299

出　　处：《煤矿现代化》2022年第6期65-68,73,共5页Coal Mine Modernization

摘　　要：随着矿井开采深度的增加,热害问题越来越严重。为研究高温对深部煤岩力学特性的影响,对深部煤层含层理、裂隙、无明显裂纹煤样进行了不同的温度处理,分析了不同煤样经受不同温度下宏观裂纹破坏情况;通过对裂隙不同煤样、层理不同煤样分别进行相同高温处理,探究了高温对深部含裂隙和层理煤样力学特性的影响;挑选层理、结构极其相似煤样进行常温和高温处理,进行单轴压缩试验,借助三维扫描仪对单轴试验过程不同位移下煤样破坏情况进行了扫描,记录下煤样破坏情况,通过对常温、高温下力学测试数据,结合常温、高温煤样裂纹扩展演化规律,探究了高温对深部煤岩力学特性的影响。With the increase of mining depth,the problem of heat damage is becoming more and more serious.In order to study the influence of high temperature on the mechanical properties of deep coal rocks,the coal samples with deep bedding,cracks and no obvious cracks were treated at different temperatures,and the macro-crack failure of different coal samples under different temperatures was analyzed.Different coal samples and different bedding samples were subjected to the same high temperature treatment.The influence of high temperature on the mechanical properties of deep cracked and bedding coal samples was explored;coal samples with similar bedding and structure were selected for normal temperature and high temperature treatment,and uniaxial Compression test,using a three-dimensional scanner to scan the damage of coal samples under different displacements during a uniaxial test,record the damage of coal samples,and use mechanical test data at room temperature and high temperature to combine the fracture fractal law of coal samples at room and high temperature.The effect of high temperature on the mechanical properties of deep coal rocks was explored.

关 键 词：深部煤岩 热冲击 层理 原生裂隙 

分 类 号：TD353[矿业工程—矿井建设]