Abstract: The present disclosure provides a physics-based and data-driven integrated method for rock burst hazard assessment, including the following steps: determining an initial stress concentration coefficient by conducting grid discretization on an assessment region, and assigning a value to each of grid nodes using a Weibull distribution function; obtaining a stress concentration coefficient value of each grid node under physics-based models; introducing seismic wave CT detection data to obtain stress concentration coefficient distribution in the assessment region under the integration of a seismic wave CT detection and its derived characterization stress model; introducing microseismic data to obtain stress concentration coefficient distribution in the assessment region under the integration of a microseismic damage reconstruction stress model; and assessing the degree of rock burst hazard according to the size of the stress concentration coefficient value.

Abstract: The invention relates to a gas storage system for a fuel cell system comprising at least one gasbag whose volume increases and decreases with the increase and decrease in the amount of hydrogen contained therein, at least two hydrogen interface valves that are located at two ends of the gas storage system, an anode gas chamber for the fuel cell and pipes configured to interconnect the anode gas chamber of the fuel cell, the gasbag and the hydrogen interface valves, wherein the ratio of the capacity of the gas storage system including the gasbag before gas inflation to the capacity after full gas inflation is less than 50%. The invention also relates to a method for using the gas storage system, which comprises charging and discharging the gasbag at different ends thereof. The advantages of the present invention include high hydrogen purity after inflation, perfect effect in purging impure gas on discharging, and relatively stable Nernst voltage on operation when compared with that of the prior art.