近距离煤层外错式布置下伏巷道断面优化研究  

Study on Cross-section Optimization of Underlying Roadway with External-misaligned Stagger Arrangement under Close Distance Coal Seam

作　　者：黄辉 虎晓龙 张杰 崔振强 郑文军 胡浩东 崔海龙 林科文 HUANG Hui;HU Xiaolong;ZHANG Jie;CUI Zhenqiang;ZHENG Wenjun;HU Haodong;CUI Hailong;LIN Kewen(Lingxin Coal Mine,Ningxia Coal Industry Co.,Ltd.,CHN Energy,Lingwu 751410,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221116,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]国家能源集团宁夏煤业有限责任公司灵新煤矿,宁夏灵武751410 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭技术》2024年第12期9-12,共4页Coal Technology

基　　金：国家自然科学基金项目(51874285)。

摘　　要：针对宁夏煤业有限责任公司灵新煤矿六采区近距离煤层外错式布置下伏巷道围岩稳定性控制问题,对061601风巷原梯形巷道断面形状进行优化,以保障巷道掘进安全。提出将梯形巷道断面变更为直墙半圆拱断面的优化方案,通过FLAC^(3D)建立工程地质模型,分析061601风巷巷道断面优化前后应力及塑性区分布特征,并进行工业性实验,监测围岩松动圈发育情况与顶板下沉量。数值模拟与现场监测结果表明:将巷道由断面梯形优化为直墙半圆拱,可有效提高围岩完整性,降低巷道塑性区范围,减少巷道顶板下沉量,保障了生产安全需要,达到了预期目标。In addressing the stability control issues of surrounding rock in the underlying roadways under the closedistance coal seam external-misaligned stagger arrangement in the sixth district of Lingxin coal mine,Ningxia Coal Industry Co.,Ltd.,an optimization was performed on the original trapezoidal cross-section of the 061601 air roadway.The objective was to ensure the safety of roadway excavation.A proposed optimization scheme involved transforming the original trapezoidal cross-section into a straight-wall semicircular arch cross-section.Using FLAC^(3D)an engineering geological model was established to analyze the stress distribution and plastic zone characteristics before and after the optimization of the 061601 air roadway cross-section.Industrial experiments were conducted,monitoring the development of loose zones in surrounding rock and the amount of roof subsidence.Both numerical simulations and on-site monitoring results indicated that optimizing the roadway crosssection from a trapezoidal shape to a straight-wall semicircular arch effectively enhanced the integrity of the surrounding rock,reduced the extent of the plastic zone in the roadway,minimized roof subsidence,and ensured the safety requirements of production,achieving the intended objectives.

关 键 词：近距离煤层 外错式布置 巷道断面优化 直墙半圆拱 

分 类 号：TD263[矿业工程—矿井建设] TD353