大埋深综采工作面高水充填沿空留巷技术研究牛清海(冀中能源峰峰集团有限公司梧桐庄矿,河北邯郸056011)摘要:沿空留巷技术在提高煤炭回收效率、缓解采掘衔接紧张和改善工作面通风系统等方面具有显著优势,与其他巷帮充填相比,高水充填材料具有凝固时间短、早期强度高、增阻速度快、纵向变形能力大等优点。以梧桐庄矿182605下工作面为工程背景,对沿空留巷巷道顶板加强支护,以保证巷道顶板的整体性和稳定性;巷道顶板打设切缝眼提前进行爆破卸压释放顶板能量,实现沿空切顶;利用沿空留巷巷帮力学模型,结合182605下工作面实际生产地质条件和煤岩体力学参数,可得巷帮最小工作阻力为7.2MN/m;利用试件进行力学性能测试,可得高水材料水灰比与试件单轴抗压强度二者之间表现为反比关系,从充填体强度、现场操作和经济效益等综合考虑,得出高水材料水灰比为1.8∶1;根据现场巷道围岩观测分析可知,工作面后方可分为缓慢变形区、显著变形区和变形稳定区。182605下工作面高水材料沿空留巷的成功实践,取得了良好的技术经济效益和社会效益,具有一定的推广应用价值。关键词:大埋深;高水充填;沿空留巷中图分类号:TD353文献标识码:B文章编号:2095-5979(2023)05-0023-05Researchongob-sideentryretainingtechnologywithhighwatermaterialfillinginlargedepthfullymechanizedminingfaceNiuQinghai(WutongzhuangMine,JizhongEnergyFengfengGroupCo.,Ltd.,Handan056011,China)Abstract:Gob-sideentryretainingtechnologyhassignificantadvantagesinimprovingcoalrecoveryefficiency,alleviatingthetensionofminingconnectionandimprovingtheventilationsystemofworkingface.Comparedwithotherroadwayfilling,highwaterfillingmaterialhastheadvantagesofshortsolidificationtime,highearlystrength,fastresistanceincreasingspeedandlargelongitudinaldeformationability.Takingthe182605lowerworkingfaceofWutongzhuangMineastheengineeringbackground,theroofofthegob-sideentryretainingroadwaywasstrengthenedtoensuretheintegrityandstabilityoftheroadwayroof.Theroofoftheroadwaywascutinadvancetoreleasetheroofenergybyblastingpressurerelief,soastorealizetheroofcuttingalongthegoaf.Usingthemechanicalmodelofgob-sideentryretaining,combinedwiththeactualproductiongeologicalconditionsoftheworkingfaceunder182605andthemechan...