特厚煤层综采放顶煤开采条件下覆岩离层注浆减沉工程的设计与实践
특후매층종채방정매개채조건하복암리층주장감침공정적설계여실천
Design and application of grouting in separated- bed for subsidence prevention under the condition of fully mechanized long wall mining with top coal caving in extra- thick coal seams
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