Based on Yulin-Hengshan coal field in northern Shaanxi of the special geological background,the permeating mechanical properties of coal-bearing strata in Xiaojihan Coal Mine were studied by transient permeation tests in this paper. According to the collected time series of pore pressure at both ends of the rock samples,the authors obtained the time series of seepage velocity and its change rate by the difference method,and then by the least squares method,the authors calculated and obtained the permeabilit...
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