强动压沿空煤巷围岩控制技术  

Surrounding rock control technology of coal roadway along goaf under strong dynamic pressure

作　　者：刘超 翟春佳 薛鹏飞 LIU Chao;ZHAI Chunjia;XUE Pengfei(Shaanxi Xiaobaodang Mining Co.,Ltd.,Yulin 719000,China)

机构地区：[1]陕西小保当矿业有限公司,陕西榆林719000

出　　处：《陕西煤炭》2021年第4期112-115,147,共5页Shaanxi Coal

摘　　要：针对二次回采影响下沿空煤巷矿压显现剧烈、巷道围岩维护困难等现象,以小保当一号煤矿112202回风顺槽为研究对象,综合现场考察调研、结构受力分析和现场工程实践等研究手段对强动压沿空煤巷的矿压显现规律和补强控制技术进行了探讨。对强动压沿空煤巷来压特征进行分析,建立多次采动影响沿空煤巷基本顶断裂结构力学模型,推导出各采动影响期间护巷煤柱作用力表达式,提出沿空煤巷破碎顶板和煤柱帮支护的关键技术,设计合理的补强控制方案,有效控制强动压沿空煤巷围岩变形,对大采高沿空煤巷围岩控制具有借鉴意义。Aiming at the phenomenon of severe mine pressure behavior and difficult maintenance of surrounding rock of gob-side entry under the influence of secondary mining,taking 112202 return air roadway of Xiaobaodang No.1 Coal Mine as the research object,the mine pressure behavior law and reinforcement control technology of gob-side entry under strong dynamic pressure are discussed by means of field investigation,structural stress analysis and field engineering practice.Based on the analysis of the pressure characteristics of gob-side entry under strong dynamic pressure,the mechanical model of the basic roof fracture structure of gob-side entry affected by multiple mining is established,and the force expression of coal pillar during each mining period is derived,the key technologies of broken roof and coal wall support of gob-side entry are proposed,and the reasonable reinforcement control scheme is designed,which effectively controls the deformation of surrounding rock of gob-side entry under strong dynamic pressure,and has reference significance for surrounding rock control of gob-side entry with large mining height.

关 键 词：沿空煤巷 二次采动 基本顶破断 围岩控制 

分 类 号：TD353[矿业工程—矿井建设] TD322