煤体爆破裂纹扩展速度试验研究Experimental Study on Blasting Crack Propogation Velocity in Coal
杨小林,孙博,褚怀保
摘要(Abstract)：
为了进一步研究煤体爆破裂纹扩展规律,以煤体爆破裂纹扩展速度为研究内容,选取0.14 mm漆包铜线和0.7 mm铅笔芯作为探针传感器材料,利用爆速仪改进的裂纹扩展测试系统对煤体内部和表面裂纹扩展速度进行测试。试验结果表明:煤体爆破裂纹扩展速度变化规律与煤体的力学性质、波阻抗及初始裂纹数量等因素有关。在初始裂纹的导向作用下,煤体中的爆破裂纹扩展速度大致经历先迅速衰减、然后近似匀速、最后缓慢衰减3个阶段。
关键词(KeyWords)： 煤体;爆速仪;裂纹扩展速度;试验研究
基金项目(Foundation): 国家自然科学基金(50874039);; 河南理工大学研究生学位论文创新基金(cx-2010-10)
作者(Author): 杨小林,孙博,褚怀保
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