不规则岩石点荷载强度试验的尺寸效应_罗文忠.pdfVIP

Serial No． 534 现 代 矿 业 534 总第 期 October． 2013 MODEＲN MINING 2013 10 10 年 月第 期 不规则岩石点荷载强度试验的尺寸效应 罗文忠 ( ) 湖南有色金属股份有限公司黄沙坪矿业分公司 ， ， 摘 要 采用现场拾得的不规则新鲜岩块进行点荷载强度测试 记录试验岩块的尺寸 分析所 。 : ， 测得的试验结果 结果表明 影响点荷载强度的因素主要是试样岩块的厚度和宽度 其长度对测试 结果几乎没有影响。 50 ～ 100 mm 、 30 ～ 50 mm ， 宽度 厚度 时试验效果最佳 且点荷载强度随尺寸的 变化呈一定规律的变化。 关键词 不规则岩块 点荷载 强度试验 Ｒesearch on Size Effect of Strength Test of Irregular Ｒock Point Load Luo Wenzhong (Hunan Nonferrous Copp ，Huanshaping Mining Branch) Abstract The point load strength test is implemented on the fresh rock picked up from the scene． The experimental results is analyzed detailedly based on the data of the size of the test block． The results of the research show that ，The length of the rock is almost has no effect on the result of the research ，so ， the thickness and width are the main factors influencing the point load strength． To be specific ，the best test results can be obtained under the conditions of the with in 50 ～ 100 milliammeter and the thickness in 30 ～ 50 milliammeter． Then ，the strength of point load changes along with the changes of the size． On the whole ，the research results in this paper can provide some refence for the further research in irregular rock point load strength． Keywords