深部巷道薄厚组合壳支护适用性模拟分析  

Simulation analysis of applicability of thin-thick composite shell supporting structure for deep roadway

作　　者：孙利辉 宋家乐 贺庆丰 丁斌 彭世龙 熊怀鑫 杨贤达 杨本生 SUN Lihui;SONG Jiale;HE Qingfeng;DING Bin;PENG Shilong;XIONG Huaixin;YANG Xianda;YANG Bensheng(College of Mining and Geomatics Engineering,Hebei University of Engineering,Handan 056038,China;Key Laboratory of Mine Geological Hazards Mechanism and Control,Xi'an 710054,China;Collaborative Innovation Center of the Comprehensive Development and Utilization of Coal Resource,Handan 056038,China)

机构地区：[1]河北工程大学矿业与测绘工程学院,河北邯郸056038 [2]矿山地质灾害成灾机理与防控重点实验室,陕西西安710054 [3]河北省煤炭资源综合开发与利用协同创新中心,河北邯郸056038

出　　处：《煤矿安全》2022年第7期189-194,200,共7页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(52074100,51874113);河北省重点研发计划资助项目(19275508D);矿山地质灾害成灾机理与防控重点实验室开放基金资助项目(KF2018-07)。

摘　　要：深部巷道在高应力作用下出现大变形,传统锚杆支护技术难以控制巷道围岩稳定。以羊东矿埋深1000 m的回风大巷为工程背景,实测了原岩应力,分析了原岩应力与回风大巷之间的关系;研发了深部巷道薄厚组合壳支护结构,采用数值模拟方法分析了不同侧压系数下巷道薄厚组合壳的适用性。结果表明:现场最大主应力为水平主应力,平均为27.97 MPa,侧压系数在1.23~1.42之间,最大水平主应力与回风大巷夹角为68°,属于大角度斜交,巷道局部易出现破坏;综合分析围岩变形破坏、支护体受力等指标,千米埋深下侧压系数在0.5~2.0之间时,巷道薄厚组合壳支护结构能够有效控制巷道稳定;侧压系数大于2时,则需要提高薄壳刚度、锚注强度,方能满足控制巷道稳定的要求。The deep roadway has large deformation under the action of high stress,and traditional bolt support technology is difficult to control the stability of the surrounding rock of the roadway.Taking the deep return air tunnel of 1000 m as the engineering background,the original rock stress was measured,and the relationship between the original rock stress and the return air tunnel was analyzed;the thin-thick composite shell support structure of the deep tunnel was developed,and the numerical value was adopted.The simulation method analyzes the applicability of the thin-thick combined shell of the roadway under different lateral pressure coefficients.The results show that the maximum principal stress on site is the horizontal principal stress,with an average of 27.97 MPa,the lateral pressure coefficient is between 1.23 and 1.42,and the angle between the maximum horizontal principal stress and the return air roadway is 68°,which is a large-angle oblique intersection,and the local roadway is prone to damage;comprehensive analysis of the surrounding rock deformation and failure,supporting body force and other indicators,when the lateral pressure coefficient is between 0.5 and 2.0 at a depth of one thousand meters,the thin-thick composite shell support structure of the roadway can effectively control the stability of the roadway;when the coefficient is greater than 2,it is necessary to increase the rigidity of the shell and the strength of anchoring and grouting to meet the requirements of controlling the stability of the roadway.

关 键 词：深部巷道 高应力场 波纹钢板 侧压系数 薄厚组合壳支护 

分 类 号：TD353[矿业工程—矿井建设]