下煤层充填开采充实率设计的数值模拟  

Numerical Simulation on the Ratio of Backfilling Design for Lower Coal Seam Backfilling Mining

作　　者：王冰[1,2,3] 郭广礼[1,2,3] 李怀展 郭庆彪[1,2,3] Wang Bing Guo Guangli Li Huaizhan Guo Qingbiao(School of Environment Science and Spatial Informatics, China University of Mining Technology,Xuzhou 221008, China Key Laboratory for Land Environment and Disaster Monitoring of SBSM ,Xuzhou 221008, China Key Laboratory of Resource Environment Information Engineering of Jiangsu Province ,Xuzhou 221008, China)

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221008 [2]国土环境与灾害监测国家测绘地理信息局重点实验室,江苏徐州221008 [3]江苏省资源环境信息工程重点实验室,江苏徐州221008

出　　处：《金属矿山》2016年第9期69-72,共4页Metal Mine

基　　金："十二五"国家科技支撑计划项目(编号:2012BAB13B03);国家自然科学基金青年基金项目(编号:41104011);江苏高校优势学科建设工程项目(编号:SZBF2011-6-B35);江苏省资源环境信息工程重点实验室基金项目(编号:JS201309)

摘　　要：多煤层开采时,下煤层充填开采效果会直接影响地表移动变形值。充实率越高,地表缓沉效果越明显,但其开采成本也越高。基于此矛盾点,利用FLAC3D数值模拟软件,系统地研究了某矿区下煤层不同充实率方案时地表移动变形值的变化规律。实验结果表明:1随着充实率的提高,地表移动变形值是呈负指数函数减小的,直至趋于某值后不再变化;2在充实率为80%时,地表最大下沉值为750 mm、最大倾斜变形值为1.5 mm/m、最大水平移动值为1.4 mm/m,均满足规程要求。不仅能保证地面建(构)筑物的安全,还能达到最优的经济效益。研究成果对于指导下煤层充填开采具有十分重要的理论和现实意义。The filling effect of lower coal seam directly affects the surface movement and deformation in the multi-coal seam mining. The higher ratio of backfilling is, the more obviously the effect of surface subsidence decreases, but the higher the mining cost becomes. In view of this contradiction, and based on the FLAC3D numerical simulation software, the change law of the surface movement and deformation were studied systematically for different size of ratio of backfilling. The experimental re- suits showed that ： ①With the increase of ratio of backfilling, The value of surface movement and deformation is decreasing in negative exponent function, and no longer changes until it reaches a certain value. ②When the ratio of backfilling is 80% , the maximum surface subsidence value is 750 mm, the maximum slope deformation value is 1.5 mm/m, the maximum horizontal displacement deformation value is 1.4 mm/m, and all of them conform to the requirements of the regulations. Then, the safety of ground buildings（structures） can be ensured, and also the optimal economic benefits is achieved. The research results have important theoretical and practical significance for guiding backfilling mining of lower coal seam.

关 键 词：条带开采 充实率设计 FLAC3D地表移动变形 

分 类 号：TD325[矿业工程—矿井建设]