摘要
为研究孤岛工作面末采时期上覆岩层失稳机理及控制技术,以塔山煤矿山4#8310孤岛工作面开采为研究地质背景,根据分析得到孤岛工作面全生命周期上覆岩层应力集中应力叠加形式,导致停采撤架期间上覆岩层裂隙发育演化特征相似于工作面的周期来压时上覆岩层裂隙发育规律。同时结合现场实测数据及力学模型演算结果,推算出采位停止位置需至少保留煤柱16.18 m,设定停采位置最终优化为1005 m。利用分析得出的停采期间围岩应力变化规律,对撤退主通道机道顶板进行补强支护,优化停采支护工艺。现场顶板窥视孔影像表明,撤架时期机道顶板变形发生在可控范围内,上覆岩层变形得到了较好的控制,保证了坚硬顶板孤岛工作面停采撤架工作安全高效的完成。
In order to study the mechanism of overburden rock destabilization and control technology during the last mining period of the isolated working face,the geological background of the study was taken as Tashan coal mine mountain 4-8310 isolated working face,according to the analysis,the stress concentration and stress superposition of the overburden rock layer during the whole life cycle of the isolated working face was obtained,resulting in the overburden rock layer fracture development and evolution characteristics similar to the overburden rock layer fracture development law when the working face comes under pressure in the cycle.At the same time,combined with the field measurement data and mechanical model calculation results,deduced that the mining stopping position needs to retain at least 16.18 m of coal column,and set the final optimized stopping position to 1005 m.Using the analysis of the change law of the surrounding rock stress during the stopping period,the top plate of the retreat main channel is reinforced and the stopping support process is optimized.The image of roof peephole on site shows that the deformation of the roof of the machine channel during the withdrawal period is within the controllable range,and the deformation of the overlying rock layer is well controlled,which ensures the safe and efficient completion of the withdrawal work of the hard roof isolated island working face.
作者
郭靖
张彪
吕帅康
尉永邦
陈建如
李建伟
GUO Jing;ZHANG Biao;LYU Shuaikang;YU Yongbang;CHEN Jianru;LI Jianwei(China University of Mining and Technology-Beijing,Beijing 100000,China;Zhaolou Coal Mine,Yanmei Heze Chemical Co.,Ltd.,Heze 274000,China;Jineng Holding Coal Industry Group,Datong 037300,China)
出处
《煤炭技术》
CAS
北大核心
2023年第2期9-13,共5页
Coal Technology
基金
国家自然科学基金资助项目(51864036
51964038)
内蒙古自治区高等学校青年科技英才支持计划(NJYT-19-B33)。
关键词
孤岛工作面
上覆岩层失稳机理
停采工艺
island working face
mechanism of overlying strata instability
stop production
