综放工作面末采深孔预注浆加固技术研究  

Research on pre-grouting reinforcement technology for deep holes in the final mining of fully mechanized mining face

作　　者：胡黎明 王春[2] Hu Liming;Wang Chun(Henan Lixing Kechuang Mining Technology Development Co.,Ltd.,Jiaozuo 454150,China;Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南力行科创矿山技术开发有限公司,河南焦作454150 [2]河南理工大学,河南焦作454003

出　　处：《煤炭与化工》2025年第4期36-40,共5页Coal and Chemical Industry

基　　金：中国博士后科学基金第73批面上资助(2023M733279)。

摘　　要：针对综放工作面末采期间围岩破碎、撤架通道维护困难、高分子化学浆存在安全隐患等问题,设计了末采区域无机材料深孔预注浆加固方案,在顺槽内施工130 m深孔,选择速凝早强和超细高强两种无机注浆材料,采用“0~30~130 m”分段注浆工艺,分别进行端头加固和全长加固。工业性试验结果表明:分段注浆工艺和两种材料保证了有效注浆量,单孔最大注浆量12.6 t,注浆终止压力14 MPa,漏浆极少,工作面进入预注浆加固区域后,片帮、冒顶架次占比为3.8%,远小于未注浆条件下的56%,撤架通道维护良好,工作面安全撤架,无机材料预注浆成本仅为高分子化学浆的38.7%。A deep hole pre-grouting reinforcement scheme for inorganic materials in the final mining area was designed to address issues such as rock fragmentation,difficulty in maintaining the dismantling channel,and safety hazards of polymer chemical slurry during the final mining period of the fully mechanized top coal caving face.A 130m deep hole was constructed in the trench,and two types of inorganic grouting materials,rapid setting early strength and ultra-fine high strength,were selected.The"0-30-130m"segmented grouting process was used for end reinforcement and full length reinforcement,respectively.The industrial test results showed that the segmented grouting process and two materials ensured effective grouting volume,with a maximum grouting volume of 12.6 tons per hole and minimal leakage.After the working face entered the pre grouting reinforcement area,the proportion of blade and roof caving trips was 6.8%,far less than the 56%under non grouting conditions.The dismantling channel was well maintained,and the working face was safely dismantled.The cost of pre grouting inorganic materials was only 38.7%of that of polymer chemical slurry.

关 键 词：末采 撤架通道 分段注浆 无机注浆材料 无机材料预注浆 

分 类 号：TD355[矿业工程—矿井建设]