深井大断面软岩巷道底鼓破坏特征及治理技术研究  

Research on Floor Heave Failure Characteristics and Treatment of Large Section Soft Rock Roadway in Deep Shaft

作　　者：刘剑 郝万东 LIU Jian;HAO Wan-dong(Ordos Energy Bureau, Ordos 017000, China;CCTEG Taiyuan Institute, Taiyuan 030006, China)

机构地区：[1]鄂尔多斯市能源局,内蒙古鄂尔多斯017000 [2]中国煤炭科工集团太原研究院,山西太原030006

出　　处：《煤炭工程》2019年第4期30-33,共4页Coal Engineering

摘　　要：为解决深井大断面软岩巷道底板问题,以察哈素煤矿11302工作面回风巷为研究对象,通过现场实际监测分析了巷道底鼓破坏规律,结果表明:巷道底部岩层存在零位移点及零应变点,并将巷道底部表面向下依次分为拉应变上升区、拉应变下降区及压应变下降区,零应力点及零位移点距巷道底板表面距离分别为1. 32m和1. 68m。分析了围岩强度、围岩应力、支护形式对巷道底鼓的影响,在此基础上提出了改变区段煤柱尺寸、优化巷道支护参数及局部注浆的底鼓控制技术。最后通过工程实践表明,采取相应技术措施后巷道底鼓得到了有效控制,具有良好的技术经济效益。In order to solve the problem of floor heave in soft rock roadway with large section in deep mine,taking the 11302 working face air return of Chahasu Coal Mine as the research object,firstly,the failure law of roadway floor heave was analyzed through field tests: there were zero displacement point and zero strain point at the bottom of roadway,the strata at the bottom of the roadway were divided into tensile strain rise zone,tensile strain drop zone and compressive strain drop zone from the surface downward,the distance between zero stress point and zero displacement point from the floor of the roadway was 1.32 M and 1. 68 m respectively. Secondly,the influence of surrounding rock strength,surrounding rock stress and support form on floor heave of the roadway is analyzed,and on the basis of the above,the control technology of changing floor coal pillar size,optimizing roadway support parameters and local grouting is proposed. Finally,the engineering practice shows that the floor heave of roadway has been effectively controlled by adopting corresponding technical measures,and has good technical and economic benefits.

关 键 词：深井 大断面 软岩巷道 底鼓 

分 类 号：TD327.3[矿业工程—矿井建设]