房柱采空区下工作面切眼巷积水区探测及煤柱应力研究
Open-off cut cumulation area probing and coal pillars stress at the working face under room and pillar mining gob
刘星宇 1王飞 2汪军琪2
作者信息
- 1. 国能榆林能源有限责任公司 郭家湾煤矿分公司,陕西 榆林 719300
- 2. 世纪万安科技(北京)有限公司,北京 100029
- 折叠
摘要
针对郭家湾煤矿51208 综采工作面初采初放期间上覆 4 煤采空区积水和残留煤柱矿压等因素的影响,采取采前物探、钻探等工程手段,查清并疏放完成影响安全生产的上覆采空区积水;采取理论计算、FLAC3D数值模拟、现场实测等方法,研究了51208 综采工作面来压步距和应力分布规律.研究结果表明,通过提前物探、钻探等工程手段以及理论计算、数值模拟等分析论证,有效治理了影响综采工作面开采的残余煤柱矿压、采空区积水、煤层露头和裂隙发育等主要隐蔽致灾因素,为类似综采工作面安全回采积累了经验.
Abstract
To work with the complex factors such as residual coal pillar pressure and goaf water accumulation in the overlying No.4 coal goaf during the initial mining and caving period of No.51208 fully mechanized face at Guojiawan Coal Mine,we employed probing and drilling before mining to make sure and drain the unsafe cumulation water in overlying gob.We studied through theoretical calculations,FLAC3D numerical simulation,and on-site measurement,etc,to define the pressure step and stress distribution of No.51208 fully mechanized face.The results show by means of advanced probing and drilling,and analyses of theoretical calculation and numerical simulation,it is effectively to control major hidden disaster factors,such as residue coal pillar pressure,gob cumulation water,coal seam outcrop and gap development.It provides favorable experience for similar fully mechanized face recovery.
关键词
上覆采空区/综采工作面/矿山压力/隐蔽致灾因素Key words
overlying goaf/fully mechanized face/mine pressure/hidden disaster factors引用本文复制引用
出版年
2024
NETL
NSTL
万方数据