近距离煤层采空区下回采巷道快速掘进技术研究  

Research on Rapid Excavation Technology of Mining Roadway under Goaf in Close Distance Coal Seam

作　　者：韩锦城 谢昌雄 王旭锋[2] 常泽超 武晋雄 潘昱彬 HAN Jincheng;XIE Changxiong;WANG Xufeng;CHANG Zechao;WU Jinxiong;PAN Yubin(Shangyuquan Coal Mine,CHN Energy Guoyuan Company,Xinzhou 036500,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]国家能源投资集团国源公司上榆泉煤矿,山西忻州036500 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭技术》2025年第1期37-43,共7页Coal Technology

摘　　要：针对上榆泉煤矿近距离煤层群赋存情况,考虑I031005回采巷道上覆9#煤层采空区的影响,采用现场调研、数值模拟以及理论分析相结合的方法,在保证回采巷道围岩稳定的情况下,提出了“锚杆支护参数优化+设备改进+工艺流程优化”的快速掘进综合技术体系。研究结果表明:基于层次分析法建立下煤层回采巷道快速掘进影响因素综合评价体系,明确影响巷道掘进速度的重要因素巷道地质条件和支护工艺;10^(#)煤层巷道基本不受9^(#)煤层遗留煤柱集中应力影响,且围岩完整性好,强度高,适当增加单根锚杆强度,减小锚杆间排距不影响回采巷道围岩稳定,锚杆合理间排距为1500 mm×1200 mm,锚杆长度为1800 mm;优化支护参数后支护时间显著降低,巷道单排支护时间由30 min降低至22 min,提高单次掘锚循环进尺提高至1.2 m;提出滑移架与截割装置相连的结构,优化循环作业方式,使掘锚同步作业,掘支平行作业率可增加42.7%;巷道月平均进尺可由750 m增至1080 m,增幅44%。研究结果可为类似条件矿井回采巷道快速掘进提供借鉴。In light of the presence of close distance coal seam groups in Shangyuquan coal mine and considering the impact of the goaf of No.9 coal seam overhanging I031005 mining roadway,a comprehensive technology system of"optimization of bolt support parameters+improvement of equipment optimization of process flow"is put forward through the combination of field investigation,numerical simulation and theoretical analysis while ensuring the stability of the surrounding rock of the mining roadway.The results indicate that a comprehensive evaluation system is constructed to identify the significant factors influencing the excavation speed based on the Analytic Hierarchy Process(AHP).The roadway of the No.10 coal seam is essentially not impacted by the concentrated stress of the coal pillar remaining from the No.9 coal seam,and the surrounding rock possesses good integrity and high strength.The stability of the surrounding rock of the mining roadway will not be affected by appropriately enhancing the strength of a single bolt and reducing the row spacing between the bolts.The reasonable row spacing between the bolts is 1500 mm×1200 mm,and the length of the bolts is 1800 mm.After the optimization of support parameters,the support time is notably reduced,with the support time of the tunnel single row decreasing from 30 min to 22 min,and the circulation footage of single excavation anchor increasing to 1.2 m.The structure of the sliding frame connected with the cutting device is proposed,and the cycle operation mode is optimized to enable the digging anchor to work synchronously,and the parallel operation rate of the digging branch can be increased by 42.7%.The average monthly tunnel footage can be elevated from 750 m to 1080 m,an increase of 44%.The research findings can offer references for the rapid excavation of mining roadways under similar conditions.

关 键 词：近距离煤层 回采巷道 快速掘进 支护参数优化 施工工艺优化 

分 类 号：TD353[矿业工程—矿井建设] TD853.34