采动影响下暗斜井机头大断面硐室底鼓治理技术  

Study of Large Section Subinclined Head Chamber Affected by Mining Action Floor Heave Controlling Technology

作　　者：曹力铭 袁超 王卫军[1,2] 彭文庆 范磊[1] Cao Liming;Yuan Chao;Wang Weijun;Peng Wenqing;Fan Lei(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines,Xiangtan 411201,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [3]南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2019年第4期44-52,共9页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51804109; 51434006; 51874130);湖南省教育厅资助科研项目(18C0333);湖南科技大学博士启动基金资助项目(E51851)

摘　　要：采用理论分析、数值模拟和现场试验等方法,分析了采动影响下,硐室底板的变形和破坏规律,提出了硐室底鼓的治理方案.研究结果表明:(1)在回采扰动影响下,硐室底板垂直变形的速率与其所受到的垂直应力及水平应力都是正相关的,即垂直变形速率随着所受到的应力增大而增大.(2)在硐室帮部打密集孔,使帮部出现围岩破碎区,扰动应力得到一定程度释放,并向深部转移,底板应力集中程度得到有效降低.(3)采用“钻孔卸压和锚索+喷浆”联合支护技术,可以达到较好的控制硐室底鼓变形的效果,这样一来就保障了硐室的安全生产.The method of theoretical analysis,numerical simulation and field test is used to analyze the deformation and failure rules of the bottom chamber of the chamber under the influence of mining,and a treatment plan for the chamber bottom drum is proposed.Results show that(1)Under the influence of mining disturbance,the vertical deformation rate of the chamber floor is positively related to the stress,that is,the vertical deformation rate increases with the increase of stress.(2)Dense holes are drilled in the upper part of the chamber,so that the broken part of the surrounding rock appears in the upper part,the disturbance stress is released to a certain extent it is transferred to the deep part,and the stress concentration of the floor is effectively reduced.(3)The combination of"drilling pressure relief and anchor cable+shotcrete"combined support technology can better control the deformation of the bottom drum of the chamber,thus ensuring the safe production of the chamber.

关 键 词：采动影响 底板破坏 钻孔卸压 数值模拟 力学模型 

分 类 号：TD354[矿业工程—矿井建设]