摘要
对安庆铜矿特大型采场不同配比的充填体进行无侧限单轴抗压强度试验,分析单轴抗压强度、平均杨氏模量、泊松比力学性质的变化及其规律,为特大型矿柱的开采提供前期的数据准备。结果表明,随水泥含量增多,充填体强度基本呈线性增大;平均抗压强度提高百分率随灰砂比的提高而变小;充填体的平均峰荷应变随水泥含量增加而逐渐增大;在从低配比(1∶10)向高配比(1∶8)转变的过程中,平均杨氏模量有一个较大的波动;充填体的泊松比随灰砂配比的变化不大。
The experiments on the unconfined uniaxial compression strength of backfill body with various ratio ot cement to tailings in the supper large-scale stope of Anqing Copper Mine are conducted. The variation and the change rule of the mechanical properties of backfill body, such as uniaxial compression strength, mean Young（s modulous and Poisson ratio etc. are analyzed. This investigation is first-phase data preparations for the mining design of supper large-scale pillar, The results show that following increase of cement content the uniaxial compression strength of backfill body behaved linearity aggrandizement, and the percent of mean strength decrease gradually, backfill body has the speciality of stain at peak load is biggish than some other concrete and rock materials, its mean stain at peak load increase following increase of cement content, from low ratio to high ratio of cement and railings the mean Young（s modulous have a big fluctuate in numerical value, but the Poisson ratio does not so.
出处
《有色金属》
CSCD
北大核心
2007年第2期66-69,共4页
Nonferrous Metals
关键词
采矿工程
充填体
单轴强度
泊松比
刚性试验机
分级尾砂
mining engineering
backfill body
uniaxial compressive strength
Poisson ratio
rigid testing machine
classified tailings
