矿井越界开采混凝土防水隔离柱留设研究

发布时间：2018-05-11 15:43

本文选题：越界开采 + 防水煤柱　；参考：《煤炭科学技术》2017年07期

【摘要】：为确定杨村煤矿与田庄煤矿井田边界安全隔水煤柱宽度,提出了以混凝土防水隔离柱取代部分煤柱,构成小煤柱与混凝土防水隔离柱相结合的边界隔水结构,采用FLAC~(3D)软件对比分析了其与全小煤柱隔水结构在矿压与水压作用下的力学状态,对有效隔水的煤柱宽度临界尺寸进行了优化研究。研究结果表明:小煤柱与混凝土防水隔离柱相结合的边界隔水结构小煤柱宽度为2.5 m,隔离柱宽度为2.5 m;而整体为煤柱隔水结构中,其最大垂直应力在采空区侧煤柱深部1.5 m处,大小为原岩应力的2.3倍,有效隔水的弹性区宽度约为1.0 m,与理论计算结果基本一致,小煤柱与混凝土防水隔离柱组合隔水结构中,最大垂直应力在隔离柱深部0.5 m处,为原岩应力的3.2倍,有效隔水的弹性区宽度约为3 m,隔水安全性更高。
[Abstract]:In order to determine the width of safe water-proof coal pillar at the boundary of Yangcun coal mine and Tianzhuang coal mine, this paper puts forward that the concrete waterproof isolation column can replace part of coal pillar, and form the boundary water barrier structure which combines small coal pillar with concrete waterproof isolation column. In this paper, the mechanical state of the water-proof structure of coal pillar under the action of rock pressure and water pressure is compared with that of the whole coal pillar by using the software FLACX (3D), and the critical size of the coal pillar width with effective water insulation is optimized. The results show that the width of the small coal pillar is 2.5 m and the width of the isolation pillar is 2.5 m, while the maximum vertical stress of the whole coal pillar is 1.5 m deep in the coal pillar on the side of the goaf, which combines the small coal pillar with the concrete waterproof isolation column, and the width of the small coal pillar is 2.5 m, and the width of the separation pillar is 2.5 m. The size of the stress is 2.3 times of the original rock stress, and the width of the effective water barrier is about 1.0 m, which is basically consistent with the theoretical results. The maximum vertical stress is 0.5 m deep of the isolation column in the combination of small coal pillar and concrete waterproof isolation column. The elastic zone width of effective water insulation is about 3 m, which is 3.2 times of the original rock stress.
【作者单位】：深部煤炭资源开采教育部重点实验室;中国矿业大学矿业工程学院;
【基金】：中央高校基本科研业务费专项资金资助项目(2014ZDPY22) 江苏省高校优势学科建设工程资助项目(PAPD)(SZBF2011-6-B35) 江苏省“六大人才高峰”资助项目(2014-ZBZZ-008)
【分类号】：TD822.3

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