摘要
针对高水材料巷旁充填体具有蠕变特性的特点,采用自行研制的大尺寸（1500 mm×600mm×900 mm）蠕变实验系统和FLAC^3D数值模拟软件对其蠕变特征进行了试验研究,分析了高水材料充填体蠕变过程中瞬时、稳定及加速3个阶段位移和应力随时间的变化特征,指出充填体蠕变极限载荷随高水速凝材料水灰比降低而提高;结合充填体在加速蠕变阶段变形速度过大的特点,为确保井下充填体长期稳定,需保证充填体保持在稳定蠕变阶段,认为充填体载荷不超过其强度的70%~80%时较为合理。
Aiming to the creep characteristics of the high-water material for filling body beside road-way, we conducted several experiments by means of a self-developed large-size test system （1500 mm×x600 mm×900 mm） and numerical simulation software FLAC^3D. The characteristics of the defor-mation and the stress of the filling body sample changing over the time were analyzed during the creep process which could be divided into three stages, instant, stable and accelerating, i.e., the limit loading of the filling body increases with the reduction of water-concrete ratio for the high-water material. Due to the great deformation speed during the accelerating creep stage, the filling body should stay at the in-stant creep stage for long-term stability. Generally, we believe that the appropriate loading on the filling body is not less than 70%-80% of its strength.
出处
《采矿与安全工程学报》
EI
北大核心
2012年第4期487-491,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学基金青年基金项目(51004101)
中国矿业大学青年基金项目(2009A001)
煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM08X02)
江苏省“333高层次人才培养工程”项目
江苏高校优势学科建设工程项目
关键词
单轴压缩
蠕变
高水材料
巷旁充填体
uniaxial compression
creep
high-water material
filling body beside roadway
