孙村煤矿－1 100 m水平深部煤岩冲击倾向性组合试验研究

冲击地压灾害防治是深部开采面临的重要难题之一。对孙村煤矿-l100m水平(埋深1310m)延伸时煤岩的冲击倾向性进行了试验研究。为探求煤-岩层相对厚度变化对深部煤岩体冲击倾向的影响，进行了7组不同高度比的煤岩组合试件力学性质与动态破坏特性的试验研究，获得了深部煤岩冲击倾向性评判结果；研究了浸水对深部煤岩强度与冲击倾向的影响，为该矿防治冲击地压提供了试验依据。

BURST-PRONE EXPERIMENTS OF COAL-ROCK COMBINATION AT-1 100 m LEVEL IN SUNCUN COAL MINE

Rockbursts are violent failures in the ground,which break rock and expell it into excavation. Rockbursts have caused numerous casualty accidents and damages of underground workings,so the control of rockbursts is one major problem for deep underground mining from the both aspects of safety and economy. The Suncun Coal Mine is one of the deepest underground coal mines in China. The burst-prone experiments of coal-rock combinations at -1 100 m level (buried depth 1 310 m) in Suncun Coal Mine were made in lab. In order to investigate the rock burst-prone of deep coal seams of different thickness,7 groups of coal-rock combination samples with different height ratio were tested to study their mechanic properties and dynamic failure behaviors. The validity of research proposal is confirmed by application cases and the coal-rock burst-prone identification results for surrounding rocks at -1 100 m level are obtained. According to the experimental results of strength change of the coal-rock samples before and after water immersion,the countermeasures for rockbursts in ultra-deep coal mining conditions are proposed. More than 300 coal-rock samples were prepared for the burst-prone experiments. The tests show that the burst-prone tendency will potentially increase with the increase of height ratio of roof rock to coal.