短壁连采连充式胶结充填采煤技术应用研究  

Application of short-wall continuous mining and continuous backfilling cemented-fill mining technology

作　　者：林海[1] 杨仁树 李永亮[3] 路彬[2] 徐斌 范子儀 李剑楠 LIN Hai;YANG Ren-shu;LI Yong-liang;LU Bin;XU Bin;FAN Zi-yi;LI Jian-nan(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]中国矿业大学(北京)能源与矿业学院,北京100083

出　　处：《工程科学学报》2022年第6期981-992,共12页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51804310,52174095)。

摘　　要：针对西部脆弱环境地区高强度开采产生的矸石减排及地表沉陷控制现实需要与意义,提出了采用短壁巷式胶结充填采煤技术.在研究短壁巷式胶结充填采煤技术开采原理基础上,介绍了该技术工作面布置方式、采充工艺流程;在充填材料方面,分析了多种充填原材料矿物成分和微观特性,并测试了不同配比条件下胶结充填材料的强度和流动特性;提出了该技术充填系统组成及整体设计思路,包括料浆制备系统、管道输送系统、监测系统和工作面充填系统四大部分.工业实践表明:短壁连采连充式胶结充填采煤技术在5 m厚近水平煤层中充实率可达98%以上,顶板最大下沉量为102 mm,地表最大下沉量为8.9 mm,共消耗了24.5万吨矸石,应用效果良好.The development and utilization of coal resources have caused serious surface collapse and destruction and ecological,environmental pollution.As the main method of green mining,backfill mining fills gangue and other wastes into the goaf to control the surface subsidence and processing coal gangue,which has broad application prospects.Aiming at the practical needs and significance of reducing gangue emission and controlling surface subsidence caused by high-intensity mining in fragile environmental areas in western China,this work proposed a short-wall continuous mining and continuous backfilling(CMCB)cemented-fill mining technology.On the basis of studying the mining principle of the short-wall CMCB cemented-fill mining technology,this work introduced layouts of this technology’s working face and mining and filling crafts according to the longwall working face and the short-wall working face,respectively,realizing the parallel operation of mining and backfilling by skip mining.The mineral composition,microscopic characteristics,and gradation characteristics of various filling materials were analyzed,and the strength and flow characteristics of the cemented filling materials under different proportions were tested on the basis of a filling material test combined with pipeline transportation characteristics and filling methods of the coal mine cemented-fill slurry.The composition and overall design ideas of the filling system of this technology were put forward,including four parts:slurry preparation system,pipeline transportation system,monitoring system,and working face filling system.The on-site test showed that the short-wall CMCB cemented-filling mining technology achieves a compression ratio of more than 98%in a 5-m thick near-level coal seam.The maximum roof subsidence is 102 mm,and the maximum surface subsidence is 8.9 mm.245000 t of gangue were used,and a good application effect was observed.

关 键 词：采煤方法 工艺流程 充填材料 充填系统设计 地表沉降 

分 类 号：TD822[矿业工程—煤矿开采]