The safety system of extremely thick coal seam is built and the extremely thick coal seam with coal bumping tendency in Qianqiu coal mine is extr...

• 在此基础上建立了适合义煤千秋矿巨厚煤层冲击地压防治的安全开采体系；成功地进行了巨厚煤层的综放开采；从而为有冲击倾向巨厚煤层的安全开采提供了成功范例.