摘要
针对陕蒙矿区综采工作面末采期间矿压显现剧烈,回撤通道围岩变形大、难以控制的问题,利用理论分析与工程实践的方法,研究了不同来压位置和悬顶结构对回撤通道稳定性的影响,以某矿30201工作面末采为研究背景,采用了切顶卸压、让压开采、合理控制推采速度、加强回撤通道支护等控制技术,实现了30201工作面的安全回撤。工程实践表明:水力压裂施工可加速顶板岩层的破断和下沉,减轻末采来压强度,支架阻力较未压裂区域相比降低了10.6%;工作面贯通时基本顶断裂位置在主辅回撤通道煤柱上方,贯通期间处于非来压阶段,实现了30201工作面的优质贯通。
In response to the severe of rock pressure during the final mining period of fully mechanized mining face in the Shaanxi and Inner Mongolia mining area,as well as the large deformation and difficulty in controlling the surrounding rock of the withdrawal passage,theoretical analysis and engineering practice were carried out to study the influence of different pressure positions and suspended roof structures on the stability of the withdrawal channel.Taking the final mining of the 30201 working face of a certain mine as the research background,control technologies such as roof cutting pressure relief,pressure-yield mining,reasonable control of advancing speed,and strengthening of support for the withdrawal channel were adopted,and 30201 working face was withdrawn safely.Engineering practice showed that hydraulic fracturing construction can accelerate the breaking and sinking of roof rock layers,reduce the strength of final mining pressure,and reduce the support pressure by 10.6%compared with the unfractured area;When the working face is connected,the main roof fracture position is above the coal pillar of the main and auxiliary withdrawal channels,and during the connection period,it is in the non-weighting stage,achieving high-quality connection of the 30201 working face.
作者
杨超
YANG Chao(Ordos Yihua Mining and Resources Co.,Ltd.,Ordos 017300,China)
出处
《煤炭工程》
北大核心
2023年第S01期70-73,共4页
Coal Engineering
关键词
回撤通道
稳定性分析
让压开采
切顶卸压
withdrawal channel
stability analysis
pressure-yield mining
roof cutting pressure relief
作者简介
杨超(1982—),男,河南伊川人,工程师,现从事煤矿生产技术、冲击地压防治技术管理工作,E-mail:13525875777@139.com
