坚硬顶板煤层群开采导水断裂带发育高度模拟研究

发布时间：2018-05-19 07:41

本文选题：数值模拟 + 坚硬顶板煤层群　；参考：《煤矿安全》2016年05期

【摘要】：采用FLAC~(3D)数值模拟软件建立了大同矿区煤层群开采的数值模型,模拟研究了煤层群开采时覆岩导水断裂带的发育过程,分析了3-5~#煤层导水断裂带发育高度与煤厚、工作面长度的关系。模拟结果显示:坚硬顶板下近距离煤层群下行开采,随采动次数增加覆岩导水断裂带高度增加的幅度逐渐减小;随煤层厚度的增加,3-5~#煤导水断裂带高度增加,当煤厚13 m时,其增幅变大;随工作面长度的增加,3-5#煤导水断裂带高度增加,当工作面长度190 m时,导水断裂带增幅减小;煤厚为15 m时,将工作面长度缩短至180 m时可确保3-5~#煤的导水断裂不与15#煤采空区贯通。
[Abstract]:The FLAC~ (3D) numerical simulation software is used to establish the numerical model of Coal Seam Group Mining in Datong mining area. The development process of the overlying water diversion fracture zone in the coal seam group mining is simulated and studied. The relationship between the development height of the water diversion fracture zone of the coal seam and the length of the working face is analyzed. The simulation results show that the close range coal seam under the hard roof is down. With the increase of coal mining, the height of the overburden fracture zone gradually decreases with the increase of coal seam thickness, the height of the 3-5~# coal guide water fracture zone increases. When the coal thickness is 13 m, the increase of the height increases. With the increase of the length of the working face, the height of the 3-5# coal guide water fracture zone increases. When the length of the working face is 190 m, the increase of the water guide fracture zone decreases; the coal thickness is reduced; the coal thickness is reduced. When the length of the working face is shortened to 180 m at 15 m, the water conductivity fracture of 3-5~# coal can not be connected with the goaf of 15# coal.
【作者单位】：山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;
【基金】：国家自然科学基金资助项目(51574154,51344009) 山东省优秀中青年科学家科研奖励基金资助项目(BS2012NJ007) 矿山灾害预防控制省部共建国家重点实验室培育基地开放课题基金资助项目(MDPC2013KF12)
【分类号】：TD823.85;TD745

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