分层开采工作面底板注浆加固条件与效果研究  

Research on the Condition and Effect of Grouting Reinforcement of Working Face Floor

作　　者：许延春[1,2] 张罗迅 张书军 罗亚麒 李磊 XU Yan-chun;ZHANG Luo-xun;ZHANG Shu-jun;LUO Ya-qi;LI Lei(School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Chinese National Engineering Research Center for Coal Mine Water Disaster Prevention and Controlling,Beijing 100083,China;Jiulishan Coal Mine,Jiaozuo Coal Industrial(Group)Co.,Ltd.,Jiaozuo 454002,China)

机构地区：[1]中国矿业大学(北京)能源与矿业学院,北京100083 [2]国家煤矿水害防治工程技术研究中心,北京100083 [3]焦作煤业(集团)有限责任公司九里山煤矿,河南焦作454002

出　　处：《煤炭工程》2019年第10期58-62,共5页Coal Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2013CB227903);国家自然科学基金资助项目(51504095)

摘　　要：以我国富水矿区焦作矿区九里山矿14141工作面为工程背景,统计分析大量底板注浆钻孔揭示的地质和水文地质信息与参量,分析了工作面注浆加固条件,得到了评价注浆效果的方法。研究得如下结论:根据注浆钻孔涌水量对工作面底板突水危险区进行划分;得到钻孔涌水量和水压呈现正相关关系;通过分析不同深度出水次数和总的涌水量,表明L8灰岩含水层富水性弱于L2灰岩含水层富水性;指出断层对底板富水性和注浆有着明显的影响。综合分析涌水量、水压、注浆量三者之间的动态关系,并发现随着注浆的持续进行水压呈现整体增大的现象,反映了底板岩层中的裂隙得到有效封堵,含水层局部密闭性增加。低水压、低涌水量和低注浆量为注浆效果良好的标志。Taking the 14141 working face of Jiulishan Coal Mine in the typical water-abundant Jiaozuo Mining Area as engineering background,we statistically analyze the geological and hydrogeological information and parameters revealed by a large number of floor grouting boreholes,evaluate the conditions of grouting reinforcement,and obtain a method to assess the grouting effect. The conclusion show that the water abundance in the floor is partitioned according to the water inflow in the grouting boreholes,based on which the positive correlation between the water inflow and water pressure is obtained. It is shown that the water abundance in L8 limestone aquifer is weaker than that of L2 limestone aquifer by analyzing the outflow frequency and total water volume in different depth,and impact of faults on water abundance in the floor and grouting effect is significant.By analyzing the dynamic relationship among water inflow,water pressure and grouting volume comprehensively,it is found that the water pressure keeps increasing as the grouting continues,which reflects that the fissures in the underlying strata are effectively grouted,and increases local tightness of aquifer. The results indicate low water pressure,low flow rate and low grouting volume are the signs of ideal grouting effect.

关 键 词：分层开采 底板突水 注浆加固 断层带 富水性 密闭水体 

分 类 号：TD745[矿业工程—矿井通风与安全]