中硬厚煤层综放开切眼综合防冲技术探索

常村煤矿21220工作面切眼受采深、顶板巨厚砾岩、煤厚及采空区侧向叠加应力等因素影响，在掘进过程中冲击地压危险性较大，严重威胁矿井安全生产。为解决该难题，采用了综合防冲技术，通过监测、支护、卸压、防护和管理措施的有效综合实施，保证了21220切眼安全掘进、贯通。

Exploration on Comprehensive Technology of Rock Burst Prevention for Open-off Cut in Fully-mechanized Caving of Medium-hard Thick Coal Seam

Under the action of mining depth，huge thick conglomerate，coal seam thickness and mined-out area superposition of lateral stress，the rock burst risk is bigger，during the roadway process of open-off cut of 21220 working face in Changcun Coal Mine. To solve the problem，by means of the comprehensive prevention technology and the comprehensive mine pressure bumping prevention measures，such as monitoring，shoring，pressure relief，protection and management measures，etc，which could be effective to ensure the safe driving and cut-through of the 21220 open-off cut.