童荣, 李化敏, 孙浩,等.特厚煤层综放工作面沿空掘巷小煤柱合理宽度留设研究[J].河南理工大学学报（自然科学版）,2021,40(5):23-29.

TONG R, LI H M, SUN H,et al.Study on the preserve of reasonable small pillar width of gateway driving along gobside of fully mechanized caving mining in specially thick coal seam face[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(5):23-29.

特厚煤层综放工作面沿空掘巷小煤柱合理宽度留设研究

童荣1, 李化敏1, 孙浩2, 李东印1

1.河南理工大学 能源科学与工程学院，河南 焦作454000;2.同煤浙能麻家梁煤业有限责任公司，山西 朔州 036000

摘要:为了研究特厚煤层综放工作面沿空掘巷小煤柱合理留设宽度，以麻家梁矿14203-1胶带 运输巷为研究对象，通过理论计算和数值模拟研究，得到麻家梁矿14204采空区稳定后侧向支承应力降低区范围，为0~12 m，并分析3，5，7，9，11 m等不同煤柱宽度下煤柱塑性区分布和垂直应力分布特征。结果表明：煤柱宽度小于7 m时，煤柱全部塑性破坏，处于应力降低区；煤柱宽度大于7 m时，煤柱中部出现弹性区，弹性区随煤柱宽度的增加而增大，煤柱中部垂直应力开始超过原岩应力。因此，留设7  m煤柱宽度即可完全满足麻家梁矿安全生产需求。研究结果可为特厚煤层综放工作面沿空掘巷小煤柱合理宽度留设提供参考依据。

关键词:麻家梁矿;特厚煤层;沿空掘巷;煤柱宽度;塑性区;应力分布

doi:10.16186/j.cnki.1673-9787.2019100034

基金项目:国家重点研发计划项目（2018YFC0604502）

收稿日期:2019/10/12

修回日期:2020/05/21

出版日期:2021/09/15

Study on the preserve of reasonable small pillar width of gateway driving along gobside of fully mechanized caving mining in specially thick coal seam face

TONG Rong1, LIHuamin 1, SUNHao 2, LIDongyin 1

1.School of Energy Science and Engineering ，Henan Polytechnic University,Jiaozuo 454000 ,Henan,China;2.Majialiang Coal Company Joint-stock by Datong Coal Mine Group and Zhejiang Provincial Energy Group Co.,Ltd. ,Shuozhou  036000 ,Shanxi,China

Abstract:Taking the gateway of the 14203-1 working face of Maijialiang coal mine as study object ,the reasonable width of small coal pillar was researched by theoretical calculation and numerical simulation. The results of the research showed that the lateral abutment pressure reduction area behind the stability of 14204 goaf in Majialiang Coal Mine was 0 ~ 12 m. The plastic zone and vertical stress distribution characteristics of coal pillar under the width of  3 ，5，7，9，11 m coal pillar were analyzed. When the width of the coal pillars were less than 7 m ,the coal pillars had all plastic failure and were in the stress decreasing zone； When the width of the coal pillars were more than 7 m ,an elastic zone appeared in the middle of the coal pillars. The elastic zone widened with the increase of the width of the coal pillars ,and the vertical stress in the middle of the coal pillars began to exceed the in-situ stresses. Therefore ,the width of 7 m coal pillars could fully meet the safety production of  Majialiang coal mime. The research results could provide reference for the reasonable small pillar width of gate-way driving along god-side of fully mechanized caving mining in specially thick coal seam working face.

Key words:Majialing coal mine;specially thick coal seam;driving roadway along goaf;coal pillar width;plastic zone;stress distribution

 特厚煤层综放工作面沿空掘巷小煤柱合理宽度留设研究_童荣.pdf