厚煤层大倾角工作面煤体应力实测及煤柱合理宽度分析
Measurement of Coal Body Stress and Research on Reasonable Width of Coal Pillar in Thick Coal Seam with Large Dip Angle
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摘要: 厚煤层工作面开采与一般厚度煤层开采不同,其一次采出厚度增高,使得上覆岩层回转运动空间加大,容易诱发较为剧烈的矿山压力显现。基于此,对下沟煤矿201厚煤层工作面煤体应力监测,监测结果表明:工作面支承压力影响范围约在工作面前方101 m,明显影响范围为52.9 m,剧烈影响范围为32.4 m;工作面留设20 m区段煤柱处于应力峰值以内,但从回收资源角度来看,可以进一步缩小煤柱尺寸。根据数值模拟计算结果,结合工作面支承压力分布规律,工作面区段煤柱的合理尺寸为7 m。Abstract: The mining of thick coal seam is different from the mining of general thick coal seam. The thickness of the first mining is increased, which makes the space of overlying strata rotary movement increase, and it is easy to induce more intense mine pressure. Based on this, the monitoring results of the stress of the 201 thick coal seam face in Xiagou Coal Mine show that the influence range of the bearing pressure of the working face is about 101 m in front of the working face, the obvious influence range is 52.9 m, and the violent influence range is 32.4 m; at present, the coal pillar in the 20 m section of the working face is within the peak stress, but from the perspective of the recovery of resources, the size of the coal pillar can be further reduced. According to the results of numerical simulation, combined with the distribution law of supporting pressure in the working face, the reasonable size of coal pillar in the working face section is 7 m.
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Keywords:
- thick coal seam /
- section coal pillar /
- coal body stress /
- field measurement /
- abutment pressure /
- overlying strata
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[1] 马耀荣,杨双锁,牛少卿,等.不同条件特厚煤层综放开采侧向支承压力分布特征[J].矿业研究与开发,2017,37(10):43-46. [2] 王钰博.特厚煤层综放工作面端部结构及侧向支承压力演化机理[J].煤炭学报,2017,42(S1):30-35. [3] 张震,王传华,王东攀,等.特厚煤层综放开采采空区侧向支承压力演化全过程实测研究[J].煤矿开采,2017,22(2):78-82. [4] 张敏,甄智鑫.特厚煤层综放面侧向支承压力分布的采厚效应[J].煤炭技术,2016,35(10):29-31. [5] 许永祥,李化敏,王开林,等.特厚煤层综放工作面侧向支承压力分布研究[J].煤炭科学技术,2014,42(11):26-28. [6] 徐仁桂,翟春佳,刘丽民,等.倾斜厚煤层沿空梯形巷道煤柱合理宽度研究[J].煤矿安全,2020,51(4):72. [7] 魏恒征,谭思奇,任旭,等.特厚煤层区段合理煤柱宽度留设研究[J].煤炭技术,2020,39(4):29-32. [8] 虎鹏.特厚煤层沿空掘巷窄煤柱留设及支护设计[J].陕西煤炭,2020,39(2):101-104. [9] 何文瑞,何富连,陈冬冬,等.坚硬厚基本顶特厚煤层综放沿空掘巷煤柱宽度与围岩控制[J].采矿与安全工程学报,2020,37(2):349-358. [10] 陈祥祺,王伸,孙浩,等.特厚煤层综放变宽度煤柱巷道围岩稳定性研究[J].矿业研究与开发,2020,40(2):82-87. [11] 关俊红.厚煤层留小煤柱托顶煤沿空掘巷支护技术[J].江西煤炭科技,2020(1):160-162. [12] 杨俊哲,宋桂军,倪惠宁,等.浅埋厚煤层综放工作面区段留设煤柱合理尺寸研究[J].矿业研究与开发,2019,39(12):5-10.
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