小汪沟铁矿南风井异常岩移错动根源与控制  

Origin and Control of Abnormal Rock Movement and Diastrophism in South Wind Well of Xiaowanggou Iron Mine

作　　者：李海英[1] 赵云峰 任思潼 任凤玉[3] LI Haiying;ZHAO Yunfeng;REN Sitong;REN Fengyu(College of Resoures and Environmental Engineering,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;Xigang Dengta Mining Co.,Ltd.,Liaoyang,Liaoning 111300,China;College of Resoures and Civil Engineering,Northeastern University,Shenyang,Liaoning ll0819,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]西钢集团灯塔矿业有限公司,辽宁辽阳市111300 [3]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《矿业研究与开发》2022年第8期78-82,共5页Mining Research and Development

基　　金：国家自然科学基金重点项目(51534003);国家重点研发计划项目(2016YFC0801601)。

摘　　要：小汪沟铁矿采用上中下三分区分段崩落法同时开采,下部采区冒透地表形成塌陷坑并逐步影响到南风井的稳定性。为保持井筒的正常回风功能,对井口到塌陷区之间的岩体结构进行了现场调查与理论分析,得出如下结论:存在两组相互垂直的高角度横纵结构面,南风井一侧被结构面切割的岩块体容易在塌陷坑散体的径向移动场中获得倾倒空间,导致南风井异常进入采动岩移范围之内。提出充填塌陷区与地表裂缝的限制倾倒岩移,并适时二次支护井壁破坏区的控制方法,有效减小了风井井口处的岩移速度,增强了井筒的抗错动能力。现场观测表明,该方法处理风井异常错动,既安全可靠,又经济实用。Xiaowanggou Iron Mine adopted the sublevel caving method with upper, middle and lower areas for mining at the same time. The lower mining area penetrated the surface to form collapse pits and gradually affected the stability of the south wind well. In order to maintain the normal return air function of the well, the rock mass structure between the wellhead and the collapse area was investigated and analyzed theoretically. The following conclusions are drawn. There are two groups of orthogonal high angle transverse and longitudinal structural planes. The rock mass cut by the structural plane on the side of south wind well is easy to collapse in the radial movement field of the collapse pit debris, resulting in the south wind well abnormally being within the range of mining rock movement. The measure of filling the collapse pits and surface cracks was put forward to limit the rock movement, combining with the timely control method of the secondary support in the broken area of well wall, which can effectively reduce the rock movement speed at the wellhead and enhance the anti diastrophism ability of the well. The field observation shows that this method is safe, reliable, economical and practical in dealing with abnormal diastrophism of wind well.

关 键 词：风井错动 采动岩移控制 井壁安全治理 结构面 

分 类 号：TD352[矿业工程—矿井建设]