关键词: 深部开采, 松动圈厚度, 巷道围岩, 声波速度, 岩体损伤

Abstract: The failure of support and roadway surrounding rock near the stope are usually observed in the deep mining.In order to improve the supporting quality，this paper adopts ultrasonic detection to study the damage law of the roadway surrounding rock in the deep stope mining of Ashele Copper Mine.And the influence of the distance between the stope and the damaged rock of the mine is analyzed emphatically.The results show that the mining of deep stope has an apparent impact on the thickness of loosen zone.With the increase of mining disturbance，the damage of roadway surrounding rock at different test holes have different degrees of growth.The damage caused by mining disturbance is closed to the distance between the rock location and the stope.The longer distance，the lower damage to the roadway surrounding rock.The distance between the stress concentrated area to the stope boundary ranges from 20 m to 25 m.Damage induced during mining process is less than 20% when the distance exceeds 25 m.There is no apparent relation of the location of the roadway，with 1.4~1.7 m of the thickness of loosen zone.The thickness of loosen zone of the roadway surrounding rock increases to 1.6~2.0 m after the mining of the nearby stope.The above study results are of great significance to improve supporting effects and reduce supporting costs.

Key words: Underground mining, Thickness of loosen zone, Roadway surrounding rock, Acoustic velocity, Rock mass damage