深部“三软”煤巷棚-索强化控制机理研究  

Study on strengthening control mechanism with support and cable for roadway in “three-soft” coal seam during deep mining

作　　者：荆升国[1,2] 王其洲[1] 陈杰[1] 

机构地区：[1]中国矿业大学矿业工程学院,深部煤炭资源开采教育部重点实验室,江苏徐州221116 [2]郑州煤炭工业(集团)公司博士后研发基地,河南郑州450007

出　　处：《采矿与安全工程学报》2014年第6期938-944,949,共8页Journal of Mining & Safety Engineering

基　　金：江苏省高校优势学科建设工程项目

摘　　要：针对郑州矿区深部"三软"煤巷变形严重,服务期间屡次扩修仍无法稳定的问题,分析了"三软"煤层赋存特点、深部应力环境及巷道失稳原因;提出棚-索强化控制理念,利用锚索提供的支护阻力提高支架的结构稳定性和承载能力,通过支架提供高支护阻力控制蠕变煤体剪胀变形和发挥深部稳定煤体的承载性能,实现支架-锚索-围岩协同承载;并根据力学计算结果指出支架结构的主、次关键强化部位及锚索预应力的合理确定。棚-索强化控制技术在超化煤矿31041运输巷进行应用后,工作面回采影响期间,巷道两帮和顶底板移近量分别控制在300 mm和400 mm以内,有效控制了深部"三软"煤巷围岩变形。In response to the problem of the unstability of the ＂three-soft＂ coal roadways caused by serious deformation despite the repeated reinforcement of it in Zhengzhou mining area, the characteristics of ＂three-soft＂ coal seam occurrence, stress environment and the causes of the unstability have been analyzed. On this basis, the strengthening control mechanism with support and cable has been proposed. In this supporting system, on one hand, the bearing capacity and stability of support are improved by the supporting resistance from the cable. On the other hand, the shear deformation of creep coal seam is effective controlled by higher supporting resistance of support. In addition, the bearing capability of coal seam is also developed, which makes the collaborative bearing of the support, cable and surrounding rock possible, and according to the mechanical calculation, the primary and secondary parts to be strengthened and the reasonable determination of the cable prestress are indicated. After the application of support and cable strengthening technology in 31041 haulage roadway of Chaohua mine, convergence of two sides in the roadway are controlled less than 300 mm during the impact of working face mining, and convergence between roof and floor are controlled less than 400 mm, which can control effectively the deformation of deep ＂three-soft＂ coal roadway.

关 键 词：深部 三软 巷道 稳定性 

分 类 号：TD353[矿业工程—矿井建设]