赵各庄矿极复杂区域保护煤柱留设数值模拟研究

发布时间：2018-06-05 03:23

本文选题：急倾斜煤层 + 保护煤柱　；参考：《煤炭工程》2016年01期

【摘要】：针对赵各庄急倾斜、大断层和采空区下极复杂区域煤层开采中煤柱留设宽度问题,理论分析了极复杂区域煤柱留设条件:一是作为断层保护煤柱,二是作为9煤老空区保护煤柱。将断层煤柱划分为采空区一侧煤体塑性区、有效隔水煤柱的弹性区和断层处煤体裂隙带三个区域,分别计算煤柱宽度。在理论分析和数值模拟基础上,建立了极复杂区域老空区下急倾斜煤层开采保护煤柱数值模型,模拟分析了工作面无煤柱、煤柱距离32m和64m三种不同情况开采时工作面围岩应力变化、围岩位移变化和塑性破坏区等情况,直观分析解释煤柱留设的依据。结合现场地质条件,计算赵各庄3839区域煤层开采煤柱留设宽度为66.2m。
[Abstract]:Aiming at the problem of coal pillar setting width in coal seam mining in Zhaogezhuang steeply inclined area, large fault area and the extremely complex coal seam in goaf, the conditions of coal pillar retaining in extremely complicated area are analyzed theoretically: first, as a fault protection pillar, The second is to protect coal pillar as 9 coal old empty area. The fault coal pillar is divided into the plastic zone of one side of the goaf, the elastic zone of the effective water-insulated coal pillar and the fracture zone of the coal body at the fault. The width of the coal pillar is calculated respectively. On the basis of theoretical analysis and numerical simulation, a numerical model of mining and protecting pillar of steep inclined coal seam in extremely complicated area of old goaf is established, and no pillar in working face is simulated and analyzed. When the coal pillar distance is 32m and 64m, the variation of surrounding rock stress, the displacement of surrounding rock and the plastic failure zone are analyzed, and the basis of coal pillar setting is analyzed intuitively. Combined with the field geological conditions, the width of the open pillar in Zhaogezhuang 3839 coal seam is calculated to be 66.2 m.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;华北科技学院安全工程学院;开滦集团有限责任公司;
【基金】：国家自然科学基金资助项目(51504095) 中央高校基本科研业务费资助(3142014066;3142015082;3142015019)
【分类号】：TD822.3

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