摘要
为解决近距离煤层群孤岛工作面复用巷道围岩控制难度高、变形量大等问题,以3109进风巷为工程研究对象,结合现场条件针对性给出巷道围岩控制方案并进行工程应用。3109进风巷围岩控制面临顶板裂隙发育、邻近3110工作面采动压力等不利因素影响,但是巷道位于2^(#)煤层采空区下的应力降低区,为巷道围岩控制创造了良好条件。结合3109进风巷现场情况,提出综合采用锚网索进行基础支护、单体+工字钢梁进行巷旁支护,同时通过注浆方式提升工作面帮稳定性。现场应用后,3109进风巷顶底板、两帮最大变形量分别控制在163、97 mm,围岩控制效果显著,实现了近距离煤层群孤岛工作面复用巷道围岩变形的有效控制。
To address the challenges of high difficulty and large deformation in surrounding rock control for reused roadways in isolated working faces of close-range coal seam groups,3109 intake airway was selected as the engineering study object.A targeted surrounding rock control solution was proposed and applied based on site conditions.The surrounding rock control of the 3109 intake airway faced adverse factors such as developed roof fractures and mining pressure from the adjacent 3110 working face.However,the roadway was located in a stress reduction zone beneath the goaf of the 2^(#)coal seam,creating favorable conditions for surrounding rock control.Based on the site conditions of 3109 intake airway,a comprehensive approach was adopted,including basic support using anchor mesh cables,roadside support using single props and I-beam steel girders,and grouting to enhance the stability of the working face ribs.After on-site application,the maximum deformations of the roof and floor,and ribs of 3109 intake airway were controlled to 163 mm and 97 mm respectively,demonstrating significant surrounding rock control effectiveness and achieving effective deformation control for reused roadways in isolated working faces of close-range coal seam groups.
作者
李文政
LI Wenzheng(Shuguang Coal Mine,Fenxi Mining(Group)Co.,Ltd.,Lvliang 032300,Shanxi,China)
出处
《能源与节能》
2025年第4期164-166,共3页
Energy and Energy Conservation
关键词
近距离煤层群
孤岛工作面
复用巷道
围岩支护
close-range coal seam groups
isolated working face
reused roadway
surrounding rock support
作者简介
李文政(1986-),男,山西临县人,本科,助理工程师,主要从事掘进技术研究。
