Data from: Pore pressure evolution and mass loss of broken gangue during the seepage

Broken gangue consists of different particles, and it has more complicated
seepage characteristics than intact rock sample. Using the self-designed
instrument, the permeability, mass loss and pore pressure of crushed
gangue during the seepage are tested. The result shows that: permeability
parameter k of crushed rock has polynomial relationship with effective
stress ’ in inverse proportion, and permeability parameter β of crushed
gangue has power exponent relationship with effective stress ’ increasing
in direct proportion. 8.0 – 10.0 mm particle size has a good support
effect. Inner pressure of crushed rock is mostly linear distribution along
the tube wall. After seepage，mass loss of broken gangue mainly increases
with large particle size out of proportion.

破碎矸石（Broken gangue）由不同粒径的颗粒组成，其渗流特性相较于完整岩样更为复杂。采用自研试验装置，对渗流过程中破碎矸石的渗透性（permeability）、质量损失（mass loss）及孔隙压力（pore pressure）进行了测试。试验结果表明：破碎岩体的渗透参数k（permeability parameter k）与有效应力（effective stress σ’）呈反比例多项式关系；破碎矸石的渗透参数β（permeability parameter β）与有效应力σ’呈正比例幂指数关系。粒径为8.0~10.0 mm的颗粒具备良好的支撑效果。破碎岩体的内部压力沿管壁大致呈线性分布。渗流结束后，破碎矸石的质量损失主要随大粒径颗粒占比呈非比例增长。