Experimental Study on Coal Entry with Water Trickling and Burst Cracked Roof Supported by Anchor Net

There are large amount of roof water spray in 10# coal seam working face in Tuan Bai coal mine, and the immediate roof with bedding and fractures was fractured. There are also many fallen columns, roof integrity was affected. Varying degrees of damage appeared by adopting traditional I-beam type passive support, when encountered fault, collapse columns and other complex tectonic areas, it prone to collapse accidents. This paper analyses the adaptability of anchor net support, based on the characteristics of coal roadway with water trickling and burst cracked roof, combined field research, coal and rock sampling and underground measures and test methods; by the application of waterproof anchoring agent, making the bolt, the anchorage force meet the design requirements, and ultimately determine the design parameters. Field trails in the headentry, and by analyzing the rock pressure monitoring data, field tests showed that the effect of supporting is good.