《工程科学学报》录用稿，htps:/doi.org/10.13374/i,issn2095-9389.2020.11.25.001©北京科技大学2020 近距离煤层工作面煤柱合理留设与巷道围岩控制技术 研究 程辉)，赵洪宝2，朱传奇2)，王涛)，徐建峰)，秦逢缘) 1)中国矿业大学（北京）能源与矿业学院，北京1000832)安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室，安徽淮南232001 ☒通信作者，E-mail:hongbaozhao@126.com 摘要：为探究近距离煤层工作面煤柱合理留设宽度以及回采巷道围岩控制技术，以回坡底煤矿近距离煤层开采为工程背景， 通过数值模拟、理论分析、现场实践等技术手段对不同宽度条件下煤柱破坏演化过程、影响因素，底板破坏范围以及11号煤层 回采巷道围岩控制技术进行了深入研究。研究结果表明：(1)煤柱在预留煤柱时期、区段煤柱氏期保护煤柱时期、孤岛煤柱时 期四个阶段过程中，煤柱破坏范围逐渐增大：煤柱弹性核占比均随煤柱宽度的增加而增加 本煤层回采巷道随煤柱宽度的 增加从非对称性破坏逐渐演化为对称性破坏。煤柱破坏宽度与煤层倾角、粘聚力、煤桂宽疫内摩擦角和泊松比等因素成反比 关系，只与埋深成正比关系。(2)随着煤柱宽度增大，煤柱底板破坏宽度与深度会发生交化洱底板破坏集中在煤柱边缘侧， 煤柱正下方底板破坏区域较小。(3)煤柱应力集中作用致底板下方最大主应力发生偏转乳底板任意一点与煤柱中心线的距离越 大，最大主应力偏转角度越小：随着11号煤层巷道与煤柱边缘距离的增大，巷道围岩塑性区由倾斜的“X”形分布转变为倾 斜的“8”形分布，再转化为倾斜的“O”形分布，最终转化为椭圆形分布 ●离煤柱距离较近时，巷道往往出现非对称性破坏， 支护也要采取非对称支护形式。 关键词：采矿工程：近距离煤层：煤柱留设：围岩控制：非对称 中图分类号：TD322 文献标识码：A Research on reasonable coal pillar setting and roadway surrounding rock control technology in close distance coal seam working face CHENG Hui,ZHAO Hong-bao, ZHU Chuan-gi,WANG Tao,XU Jian-feng,OIN Feng-yuan 1)School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China. 2)Anhui Province Key Laboratory of Mining Resp thd Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan,Anhui 232001,China Corresponding author,E-mail:hong ABSRTACT:In order to explore the reasonable width of coal pillar and surrounding rock control technology of mining roadway in close distance coal seam working face.this paper takes the mining of No.10 coal seam and No.11 coal seam of Huipodi coal mine as the engineering background,through numerical simulation,theoretical analysis,field practice and other technical means,the evolution process of coal pillar failure,influencing factors,damage range of floor under different width conditions are analyzed.The surrounding rock control technology of mining roadway is studied in depth.The results show that:(1)During the four stages of reserved coal pillar,section coal pillar,protective coal pillar and isolated coal pillar,the damage scope of coal pillar gradually increased;The proportion of elastic core of coal pillar increased with the increase of coal pillar width,the mining roadway in this coal seam evolves from asymmetric failure to symmetrical failure.The failure width of coal pillar is inversely proportional to coal seam dip angle,cohesion,coal pillar width,internal friction angle and poisson's ratio,but only proportional to buried depth.(2)With the increase of coal pillar width,the width and depth of coal pillar floor failure will change,and the floor failure concentrated on the side of coal pillar edge,and the floor damage area under the coal pillar is small.(3)The maximum principal stress under the floor deflects 1收稿日期：2020-11-25 基金项目：越崎杰出学者计划(800015Z1179):深部煤矿采动响应与灾害防控国家重点实验室开放基金资助项目(SKLMRDPC19KF01):中央高校基本 科研业务费研究生科研创新能力提升项目(2020 YJSNY07)近距离煤层工作面煤柱合理留设与巷道围岩控制技术 研究 程 辉 1)，赵洪宝 1,2)，朱传奇 2)，王 涛 1)，徐建峰 1)，秦逢缘 1)1 1) 中国矿业大学（北京）能源与矿业学院，北京 100083 2) 安徽理工大学 深部煤矿采动响应与灾害防控国家重点实验室，安徽 淮南 232001  通信作者，E-mail: hongbaozhao@126.com 摘 要：为探究近距离煤层工作面煤柱合理留设宽度以及回采巷道围岩控制技术，以回坡底煤矿近距离煤层开采为工程背景， 通过数值模拟、理论分析、现场实践等技术手段对不同宽度条件下煤柱破坏演化过程、影响因素、底板破坏范围以及 11 号煤层 回采巷道围岩控制技术进行了深入研究。研究结果表明：(1)煤柱在预留煤柱时期、区段煤柱时期、保护煤柱时期、孤岛煤柱时 期四个阶段过程中，煤柱破坏范围逐渐增大；煤柱弹性核占比均随煤柱宽度的增加而增加，本煤层回采巷道随煤柱宽度的 增加从非对称性破坏逐渐演化为对称性破坏。煤柱破坏宽度与煤层倾角、粘聚力、煤柱宽度、内摩擦角和泊松比等因素成反比 关系，只与埋深成正比关系。(2)随着煤柱宽度增大，煤柱底板破坏宽度与深度会发生变化，且底板破坏集中在煤柱边缘侧， 煤柱正下方底板破坏区域较小。(3)煤柱应力集中作用致底板下方最大主应力发生偏转，底板任意一点与煤柱中心线的距离越 大，最大主应力偏转角度越小；随着 11 号煤层巷道与煤柱边缘距离的增大，巷道围岩塑性区由倾斜的“X”形分布转变为倾 斜的“8”形分布，再转化为倾斜的“O”形分布，最终转化为椭圆形分布；离煤柱距离较近时，巷道往往出现非对称性破坏， 支护也要采取非对称支护形式。 关键词：采矿工程；近距离煤层；煤柱留设；围岩控制；非对称性破坏 中图分类号：TD322 文献标识码：A Research on reasonable coal pillar setting and roadway surrounding rock control technology in close distance coal seam working face CHENG Hui1)，ZHAO Hong-bao1,2)，ZHU Chuan-qi2)，WANG Tao1)，XU Jian-feng1)，QIN Feng-yuan1) 1) School of Energy and Mining Engineering, China University of Mining and Technology(Beijing), Beijing 100083,China. 2) Anhui Province Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines ， Anhui University of Science and Technology, Huainan, Anhui 232001,China  Corresponding author, E-mail: hongbaozhao@126.com ABSRTACT: In order to explore the reasonable width of coal pillar and surrounding rock control technology of mining roadway in close distance coal seam working face, this paper takes the mining of No.10 coal seam and No.11 coal seam of Huipodi coal mine as the engineering background, through numerical simulation, theoretical analysis, field practice and other technical means, the evolution process of coal pillar failure, influencing factors, damage range of floor under different width conditions are analyzed. The surrounding rock control technology of mining roadway is studied in depth. The results show that: (1) During the four stages of reserved coal pillar, section coal pillar, protective coal pillar and isolated coal pillar, the damage scope of coal pillar gradually increased; The proportion of elastic core of coal pillar increased with the increase of coal pillar width, the mining roadway in this coal seam evolves from asymmetric failure to symmetrical failure. The failure width of coal pillar is inversely proportional to coal seam dip angle, cohesion, coal pillar width, internal friction angle and poisson's ratio, but only proportional to buried depth. (2) With the increase of coal pillar width, the width and depth of coal pillar floor failure will change, and the floor failure concentrated on the side of coal pillar edge, and the floor damage area under the coal pillar is small. (3) The maximum principal stress under the floor deflects 1收稿日期：2020-11-25 基金项目：越崎杰出学者计划(800015Z1179)；深部煤矿采动响应与灾害防控国家重点实验室开放基金资助项目(SKLMRDPC19KF01)；中央高校基本 科研业务费研究生科研创新能力提升项目(2020YJSNY07) 《工程科学学报》录用稿，https://doi.org/10.13374/j.issn2095-9389.2020.11.25.001 ©北京科技大学 2020 录用稿件，非最终出版稿