沿空留巷围岩变形机理及控制技术  

Deformation Mechanism and Control Technology of Surrounding Rock of Gob-side Entry Retaining

作　　者：许向前[1] 赵健[1] 郑志阳[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《矿业工程研究》2017年第2期20-24,共5页Mineral Engineering Research

基　　金：高等学校博士学科点专项科研基金资助项目(20120023110023);中央高校基本科研业务费专项资金资助项目(2014QZ03)

摘　　要：为控制沿空留巷围岩变形,分析不同阶段巷道围岩结构和应力分布,研究围岩变形机理,结果表明:影响沿空留巷围岩变形的主要因素是巷道顶板的三铰接梁结构.结合影响巷道顶板下沉和巷帮挤出的具体因素,研究下沉量和挤出量的计算方法,并以下沉量和挤出量为依据,确定沿空留巷围岩变形的控制策略.通过研究巷旁支护对控制围岩变形效果的影响,提出根据顶板下沉量判断顶板触矸情况,确定巷旁支护工艺.利用数值模拟软件,计算某矿沿空留巷时巷道围岩与巷旁充填体的应力分布情况,验证该矿沿空留巷围岩变形的控制效果和巷旁支护的合理性.In order to control the surrounding rock deformation of the gob-side entry retaining, the structure of the roadway surrounding rock and stress distribution in different stages are analyzed and the deformation mechanism of surrounding rock is studied. Results show that the main factors affecting the deformation of the surrounding rock are the three - hinged beam structure of the roadway roof. According to the specific impact factors of roadway roof sinking and side wall out, this paper studies the method of calculating the amount of sinking and the amount of extrusion. In addition, the control strategy of surrounding rock deformation of gob-side entry retaining is determined based on the amount of sedimentation and extrusion. The influence of roadway-side support on the deformation of surrounding rock is analyzed. It is proposed to judge the roof contacting gangue according to the amount of roof sinking, and then determine the road-side support technology. The numerical simulation software is used to calculate the stress distribution of the surrounding rock and the road-side filling body in the mine, and the control effect of the surrounding rock deformation and the rationality of the road-side support are analyzed.

关 键 词：沿空留巷 围岩变形 巷旁支护 数值模拟 

分 类 号：TD322[矿业工程—矿井建设]