综放工作面端面顶板稳定性控制研究  

Study on Stability Control of End Face Roof of Fully Mechanized Caving Face

作　　者：牟秀超 张百胜[1] 杨永康[2] 王夏南 金力波 康立勋[1] MU Xiuchao;ZHANG Baisheng;YANG Yongkang;WANG Xianan;JIN Libo;KANG Lixun(College of Mining Technology,Taiyuan University of Technology,Taiyuan 030024,China;Institute of Mining Technology,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]太原理工大学采矿工艺研究所,山西太原030024

出　　处：《煤矿安全》2018年第7期43-47,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51404167);山西省自然科学基金资助项目(2014011035-2)

摘　　要：针对综放工作面过地质破碎带时极易出现煤壁片帮、架前冒落等生产难题,结合某矿实际地质条件,根据顶板特点构建了端面顶板冒落拱结构力学模型和"梁"结构力学分析模型,得到端面顶板最大冒落高度和注浆加固顶板厚度h的计算公式。通过UDEC数值模拟研究,地质破碎带发育至煤层时,单纯考虑加固顶板不能有效控制端面顶板稳定。可通过煤壁注浆加固提高煤壁的强度,煤壁注浆后强度不宜低于1.5 MPa;顶板注浆加固厚度不宜小于2 m。For the problem that it is easy to appear wall caving and roof fall during fully mechanized caving face passing through geological fracture zone, combined with the actual geological conditions of a mine, the mechanical model and the structural mechanics analysis model of the beam of the end roof are constructed based on the roof characteristics, and the formula for calculating the maximum caving height and grouting reinforcement thickness h is obtained. Through the numerical simulation of UDEC, when the geological fracture zone is developed to the coal seam, simply consider to reinforce roof can not effectively control the stability of the terminal roof. The strength of the coal wall can be increased by grouting through the coal wall. The strength of the coal wall grouting should not be less than 1.5 MPa, and the thickness of the grouting reinforcement should not be less than 2 m.

关 键 词：综放工作面 地质破碎带 片帮 冒顶 注浆加固 

分 类 号：TD322.1[矿业工程—矿井建设]