关键词: 深埋, 回风巷, 围岩破坏规律, 现场监测, 支护技术, 厚煤层

Abstract: To solve the problem that the surrounding rock of the tunnel for ventilation roadway in the 40203 fully mechanized caving face of in a deep thick coal seams coal mine in Bingchang Mining Area in Shanxi province was soft and broken. The failure law of the surrounding rock for the tunnel was analyzed. The results showed that the surrounding rock of the tunnel has the characteristics of big deformation and the asymmetrical section and being hard to support, etc. Combining the field actual situation, the new support scheme and the monitoring program in the tunnel for water draining of the fully mechanized caving face were made on the basis of the general principle of the support scheme which contained the pressure relief and the reinforced support and the stilt support. The practice showed that the surrounding rock of the tunnel was steady after the implementation of the new support scheme, which showed that the design of the new support scheme was reasonable. The result will provide important referenced value to the support scheme design of the crossheading of fully-mechanized sublevel caving coal face with thick coal seam in the similar situation.

Key words: deep coal roadway, thick coal seam, failure law of the surrounding rock of the tunnel, on-site monitoring, support technology