侏罗系特厚煤层综放开采白垩系覆岩水资源恢复动态研究  

DYNAMIC RECOVERY OF CRETACEOUS WATER RESOURCE ABOVE FULLY MECHANIZED CAVING OF JURASSIC ULTRA-THICK COAL SEAM

作　　者：雷利剑 乔伟[2] 袁中帮 牛云飞 田野 黄阳 LEI Lijian;QIAO Wei;YUAN Zhongbang;NIU Yunfei;TIAN Ye;HUANG Yang(School of Transportation,Southeast University,Nanjing 211106;School of Resources and Earth Science,China University of Mining and Technology,Xuzhou 221116;Tongchuan Qiaoziliang Coal Industry Co.,Ltd.,Tongchuan 727000;Beijing Tanchuang Resources Technology Co.,Ltd.,Beijing 100000;CUMT Geotechnical Engineering ＆ New Technology Development Co.,Ltd.,Xuzhou 221116;Cuimu Coal Mine,Shaanxi Yonglong Energy Development Construction Co.,Ltd.,Baoji 721501)

机构地区：[1]东南大学交通学院,南京211106 [2]中国矿业大学资源与地球科学学院,徐州221116 [3]铜川乔子梁煤业有限公司,铜川727000 [4]北京探创资源科技有限公司,北京100000 [5]徐州中国矿大岩土工程新技术发展有限公司,徐州221116 [6]陕西永陇能源开发建设有限责任公司崔木煤矿,宝鸡721501

出　　处：《工程地质学报》2018年第4期1054-1063,共10页Journal of Engineering Geology

基　　金：国家自然科学基金项目(41772302);国家重点基础研究计划(973计划)(2015CB251601);江苏高校优势学科建设工程项目资助

摘　　要：永陇矿区崔木煤矿特厚煤层(12~18 m)综放开采期间,顶板白垩系离层水害及相应防治水措施均对洛河组优质水资源造成较大影响,研究洛河组水位动态恢复可为煤炭资源开发对水资源的影响提供参考。利用离层发育层位判别公式和离散元软件UDEC对离层发育位置及其动态发育过程进行分析,在采前-采动-采后水位监测、井下涌突水分析和理论分析基础上,首先通过配线法求取了洛河组水文地质参数,然后利用Theis公式建立了洛河组水位动态恢复模型,最终获得了矿井水位动态恢复时间。结果表明:洛河组底部砂砾岩与砂质泥岩界面间产生了规模较大且相对封闭的空腔型离层,工作面出水点降至最低水位可看作是虚拟抽水井以定流量Q在tp时间内抽水造成的降落漏斗,其恢复过程可理解为以流量Q继续抽水一直延续到t时刻的降深和从停抽时刻起以流量Q注水t-tp时间的水位抬升的叠加。基于修正的Theis公式得到洛河组水位降至最低点所需时间为7.9459 d,水位恢复90%所需时间为35.6090 d,与工作面实测结果相近,且洛河组水位在初始阶段恢复较快,而在后期则恢复缓慢。During the mining of ultra-thick coal seam（ 12 ~ 18 m） in Cuimu site of Yonglong mine area,separation water inrush occurred in roof Cretaceous overburden,which and its prevention measures caused a bad influence onthe water resources of overlying Luohe formation aquifer. Thus the study on dynamic recovery of Luohe formation water level can provide reference for the influence of water resources caused by the exploitation of coal resources.This paper analyzes the development position and the dynamic process of bed separation using the discriminant formula and discrete element software UDEC,respectively. Based on the water level monitoring,water inrush analysis and theoretical analysis,this paper firstly obtains the hydrogeological parameters of Luohe formation,then establishes the water dynamic recovery model using Theis＇ s equation,finally obtains the time consuming of water recovery. The results show that the bed separation developed in the interface between the sandy conglomerate in the bottom of Luohe formation and the underlying sandy mudstone is relatively closed and largescale. The lowest water level of water inrush point can be regarded as the cone of depression caused by virtual pumping well with discharge Q during the period from 0 to tp. The water recovery process can be recognized as the superposition of pumping water with discharge Q and injecting water with discharge Q during the period from tpto t. Based on the Theis＇ s equation,the time needed for Luohe formation to drop to the lowest point is 7. 9459 days. The consuming time of water recovery is 35. 6090 days. The results are similar to the actual data. The water recovery of Luohe formation is faster in the initial period but slower in the later period.

关 键 词：保水采煤 洛河组 离层积水 疏放水 水位恢复 Theis公式 

分 类 号：P641.43[天文地球—地质矿产勘探]