不同围压下软岩巷道全长锚固支护优化研究

以淮南矿区丁集矿西三采区地质条件为背景,采用FLAC3D计算软件对深井软岩巷道全长锚固支护条件下围岩稳定性进行模拟计算,获得不同围岩应力和支护强度作用下巷道围岩稳定性影响规律。得知,随着围岩应力环境增大,巷道顶帮下沉量和底板底鼓量增大,巷道顶底板变形位围岩移量变化趋势与巷道两帮变形趋势基本一致,在10 MPa围岩环境中,锚杆支护排距以800 mm×800 mm较优。研究结果可为深埋回采巷道锚杆支护的设计与施工提供了一定的参考。

Study on full length anchoring support effect of soft rock roadway under different surrounding rock stress and support strength

Based on the geological conditions of West No.3 mining area of Dingji mine in Huainan mining area,FLAC3D calculation software is used to simulate the surrounding rock stability of deep mine soft rock roadway under the condition of full-length anchoring support,and the influence law of surrounding rock stability under different surrounding rock stress and support strength is obtained.The results show that with the increase of surrounding rock stress environment,the roof subsidence and floor heave increase,and the change trend of surrounding rock displacement at the deformation position of roadway roof and floor is basically consistent with the deformation trend of both sides of roadway.In the surrounding rock environment of 10 MPa,the bolt support row spacing of 800 mm×800 mm is better.The researchresults can provide a certain reference for the design and construction of bolt support in deep mining roadway.