遗留煤柱影响下回采巷道变形特征及分区域支护方法  

Deformation Characteristics and Regional Support Method of Mining Roadway Under the Influence of Legacy Coal Pillar

作　　者：李小全 彭小跃 李勇 程涛 周安平 LI Xiaoquan;PENG Xiaoyue;LI Yong;CHENG Tao;ZHOU Anping(Hunan Coal Industry Co.,Ltd.,Zhouyuanshan Mining Branch,Chenzhou 423401,China)

机构地区：[1]湖南煤业股份有限公司周源山矿业分公司,湖南郴州423401

出　　处：《矿业工程研究》2024年第4期33-41,共9页Mineral Engineering Research

摘　　要：针对近距离煤层遗留煤柱作用下回采巷道稳定性控制问题,以周源山煤矿3232运巷为研究背景,将3232运巷与1号煤遗留煤柱的空间位置关系划分为3种情况,综合运用现场调研、室内试验、数值模拟和现场测试等方法,系统研究3种情况下3232运巷顶板垂直应力分布特征与变形特征,探讨3232运巷大变形的成因.结果表明:3232运巷顶板应力分布在巷道空间走向上具有明显的分段特征,在上遗留煤柱与巷道空间纵向上具有分区特征;3232运巷在走向上表现出明显的分区域大变形特征.顶板围岩强度低、垂直应力大、顶板围岩结构差以及顶板支护强度不足是造成3232运巷大变形的主要原因.针对3232运巷分区域大变形特征,提出分区域加强支护原则,经验证,所提方案能够有效控制3232运巷稳定性.Aiming at the stability control of mining roadway under the influence of legacy coal pillar in close-distance coal seam,this paper takes 3232 roadway in Zhouyuanshan Coal Mine as the research background,divides the spatial position relationship between 3232 roadway and legacy coal pillar in 1 coal seam into three situations,and systematically studies the vertical stress distribution and deformation characteristics of 3232 roadway roof under three situations by means of field investigation,indoor test,numerical simulation and field test.Results show that the stress distribution of the roof of 3232 roadway has obvious segmentation characteristics in the spatial direction of roadway,and it has zoning characteristics in the vertical direction of the legacy coal pillar and roadway space.3232 roadway shows obvious characteristics of large deformation in different regions along the strike.Low roof surrounding rock strength,large vertical stress,poor roof surrounding rock structure and insufficient roof support strength are the main reasons for the large deformation of 3232 roadway.According to the large deformation characteristics of 3232 roadway in different regions,the principle of strengthening support in different regions is put forward.It is verified that the proposed scheme can effectively control the stability of 3232 roadway.

关 键 词：近距离煤层 遗留煤柱 回采巷道 大变形 分区域支护 

分 类 号：TD353[矿业工程—矿井建设]