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在煤体中实施爆破作业是煤矿生产常用的技术手段,但煤体中爆炸作用机理目前尚不清楚.为研究煤体中爆炸作用情况,采用不同配比的相似材料模拟不同强度的煤体,在实验室完成了相似煤体内部的爆炸试验.利用USB超动态应变测试仪和DasView2软件测试分析了模拟煤体试件内部的动态应变波、爆炸应力波在不同强度的相似煤体中的衰减规律,通过对模拟试件切割,宏观描述了试件内部爆破产生的裂缝形成情况及其分布规律.
Blasting operation in coal is a commonly used technical means in coal production, but the mechanism of explosion in coal body is not yet clear.In order to study the effect of explosion in coal, similar strength and strength of coal are simulated by similar materials of different proportions, In the laboratory, the internal explosion tests of similar coal were completed.The dynamic strain waves inside the simulated coal samples were analyzed by USB dynamic strain tester and DasView2 software, and the attenuation of the explosive stress waves in similar coal bodies with different intensities By means of cutting the simulated specimen, macroscopic description of the formation and distribution of the cracks caused by blasting inside the specimen is given.