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研究主要巷道及其两侧煤柱的压力变化,包括一侧、两侧采动及工作面朝向或背离主要巷道回采时的压力变化。
To study the pressure changes of the main roadway and the pillars on both sides of the roadway, including the pressure changes during the mining on one side and the two sides as well as the working face facing away from or away from the main roadway.