煤巷肩窝锚杆破断崩落机理分析及控制  

Breaking and Caving Mechanism Analysis for Coal Roadway Shoulder Bolting and Its Control

作　　者：庞冬冬[1] 马海峰[2] 庞大伟[3] 

机构地区：[1]安徽理工大学深部煤矿采动响应与灾害防控安徽省重点实验室,安徽淮南232001 [2]中国矿业大学(北京),北京100083 [3]淮南矿业集团有限公司潘二煤矿,安徽淮南232000

出　　处：《煤矿安全》2015年第4期185-188,共4页Safety in Coal Mines

摘　　要：针对淮南潘二矿18126下顺槽煤巷掘进过程中肩窝锚杆破断失效及崩落伤人问题,对煤巷围岩地质概况及巷道规格的分析可知,折线形巷道在围岩次生应力作用下肩窝处出现较大的应力集中,肩窝锚杆破断主要有锚尾破断、顶帮交界面处破断和离层造成的破断3种形式,建立锚杆破断力学模型,对锚杆破断机理进行分析,在力学模型的研究基础上,针对不同破断形式进行了参数优化。提出了1种带环孔内置螺纹钢圈配合钢丝连接锁扣锚杆崩落防护措施,借助周围固定约束力,有效的避免了锚杆端头崩落伤人事故。Aiming at the shoulder bolting rupture failure and caving problem in the process of 18126 lower crossheading excavating in Huainan Pan＇er Coal Mine,through the analysis of geological conditions and the specifications of coal roadway,the roadway shoulder angle of mansard roadway under the effect of surrounding rock secondary stress appears larger stress concentration,shoulder bolting fracture mainly have the anchor end breakage,top and laneway＇s side interface fracture and abscission layer caused by the breaking three forms.Setting up the bolting breakage model,the fracture mechanism of shoulder bolting are analyzed,based on the study of mechanical model,according to different fracture forms,parameter optimization design was carried out.We propose a kind of standard built-in rebar with ring hole circle with wire connection lock bolt fall protection measure,with the aid of metal mesh around fixed binding,which effectively avoids the anchor end caving injuries.

关 键 词：煤巷掘进 肩窝锚杆 剪切破断 支护设计 崩落防护 

分 类 号：TD353.6[矿业工程—矿井建设]