摘要
对不同灰砂比的深井充填体进行了无侧限单轴抗压、抗拉测试,抗压试验中测得抗压强度、弹性模量和泊松比等数据;抗拉试验中测得抗拉强度、线性阶段弹性模量和峰荷应变等参数。分析了拉、压试验中力学性质的变化规律,鉴于拉压性质的相关性,对拉压力学参数和试验曲线作了一定的对比分析,对充填体细观破坏及充填体-围岩-矿柱系统作用机制进行了研究,旨在为矿柱开采提供技术支持。
A test has been done for the unconfined uniaxial compressive strength and tensile strength test of backfills with different ratios. In the compressive strength test, uniaxial compressive strength, Young＇s elastic modulus and Poisson ratio were obtained, and tensile strength, Young＇s elastic modulus at linear phase and stain parameters at peak load were obtained in tensile strength test. The change rule of mechanical property in compressive and tensile strength test was then analyzed. A comparative analysis was made for the tension-compression mechanical behavior in view of the correlation between tension and compression. The microcosmic damage of backfills and the mechanism of filling mechanism of backfill-surrounding rock-pillar system in deep mine were investigated, aiming to provide some technical support for pillar mining.
出处
《矿冶工程》
CAS
CSCD
北大核心
2008年第6期15-17,共3页
Mining and Metallurgical Engineering
关键词
充填体
细观破坏
充填机制
矿柱开采
backfill
microcosmic damage
filling mechanism
pillar mining
