深埋高侧压巷道底鼓机理分析及控制-中南大学学报.PDFVIP

第 48 卷第 2 期 中南大学学报( 自然科学版) Vol.48 No.2 2017 年 2 月 Journal of Central South University (Science and Technology) Feb. 2017 DOI: 10.11817/j.issn.1672−7207.2017.02.025 深埋高侧压巷道底鼓机理分析及控制 曹平，李好月，钟涌芳，王飞 ( 中南大学 资源与安全工程学院，湖南 长沙，410083) 摘要：通过理论分析、数值计算、力学推导、现场试验等方法，完成深部不同侧压下的巷道底鼓过程模拟，研究 高侧压巷道的底板变形规律，进行巷道底板与钢管梁共同作用的机理分析及模型转换计算，实现多梁联合控制底 鼓设计方案的验证。研究结果表明：底板两侧受高水平应力的作用向裸露面发生弯曲，其过程分为加速形变、匀 速形变、过渡形变和最终稳定 4 个阶段；随侧压系数 λ增大，底鼓现象加重，当 0.5＜λ＜1.5 时，变化尤为明显， 当λ＞2.0 时，变化速率减缓，但仍呈增加趋势；采用钢管梁横撑底板两帮，可减弱两帮向内收敛挤压底板的趋势， 能提供横向支护反力以抵抗底板变形；沿巷道走向布置钢管梁，构成多梁联合控制体系，使单梁的控制范围实现 区域重叠，可以增强底板整体抗弯曲变形能力。 关键词：采矿工程；侧压系数；巷道底鼓；底鼓控制 中图分类号：TD32 文献标志码：A 文章编号：1672−7207(2017)02−0457−08 Mechanism and control of floor heave of deep buried roadway with high lateral pressure coefficient CAO Ping, LI Haoyue, ZHONG Yongfang, WANG Fei (School of Resources and Safety Engineering, Central South University, Changsha 410083, China) Abstract: Based on the theoretical analysis, numerical simulation, mechanical calculation and field investigation, the numerical simulation of the floor heave of the roadway with different lateral pressure coefficients was completed, the deformation law of the roadway with a high lateral pressure coefficient was discussed, the analysis of the floor-transverse supporting’s interaction mechanism was finished, the calculation of the model conversion was completed and the scheme of the controlling the floor heave with transverse supporting was verified. The results show that: with a high lateral pre