大断面沿空掘进巷道窄煤柱内裂隙演化规律分析  

Analysis of fissure evolution law in narrow coal pillar of large cross-section gob-side entry driving roadway

作　　者：王春森 郑茂慧 WANG Chunsen;ZHENG Maohui

机构地区：[1]内蒙古黄陶勒盖煤炭有限责任公司巴彦高勒煤矿,内蒙古鄂尔多斯017300

出　　处：《中国矿山工程》2021年第4期9-12,28,共5页China Mine Engineering

摘　　要：3102回风巷道采用6 m煤柱护巷,且邻近的3101工作面开采的3-1煤层为自然发火煤层,受采空区侧向压力及掘进影响,3102回风巷道护巷煤柱变形量较大。为了确保巷道掘进安全、避免邻近采空区内遗煤自燃,采用模拟分析、现场观测方法对煤柱内裂隙演化规律进行分析。结果表明,随着3102回风巷道掘进煤柱内裂隙逐渐扩展,且煤柱内存在有贯通裂隙,煤柱内裂隙扩展分4个区域。研究成果为矿井采取针对性裂隙封堵技术提供参考借鉴。The 3102 return airway is protected by 6 m coal pillar,and the 3-1 coal seam mined in the adjacent 3101 working face is spontaneous combustion coal seam. Due to the influence of lateral pressure in goaf and tunneling,the deformation of coal pillar in the3102 return airway is large. In order to ensure the safety of roadway driving and avoid spontaneous combustion of residual coal in adjacent goaf,the evolution law of fissures in coal pillar is analyzed through simulation analysis and field observation. The results show that with the gradual expansion of the fissures in the coal pillar in the 3102 return airway,and there are through-fissures in the coal pillar,the fissures in the coal pillar can be divided into four areas. The research results provide reference for adopting targeted fissures blocking technology in mines.

关 键 词：沿空掘巷 窄煤柱 裂隙 自燃煤层 采空区 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]