肥城煤田奥灰顶部注浆加固可行性分析  

Feasibility analysis of grouting reinforcement of Ordovician top in Feicheng coalfield

作　　者：施龙青[1,2] 邱梅[1,2] 牛超[2] 韩进[3] 季小凯 

机构地区：[1]山东省沉积成矿作用与沉积矿产重点实验室,山东青岛266590 [2]山东科技大学地球科学与工程学院,山东青岛266590 [3]山东科技大学信息科学与工程学院,山东青岛266590

出　　处：《采矿与安全工程学报》2015年第3期356-362,共7页Journal of Mining & Safety Engineering

基　　金：教育部高等学校博士学科点专项科研基金项目(20133718110004);青岛经济技术开发区重点科技发展计划项目(2013-1-62);山东科技大学科研创新团队支持计划项目(2012KYTD101);山东科技大学研究生科技创新基金项目(YC140103)

摘　　要：针对肥城煤田不能够采用疏水降压的方法实现受奥灰突水威胁煤层安全开采的情况,开展了奥灰顶部注浆加固可行性试验研究。通过大量的钻孔资料统计、井下奥灰孔钻探工程、奥灰岩样X-衍射、显微镜下鉴定,获得了肥城煤田奥灰顶部岩溶裂隙宏观和微观发育特征,得出了肥城煤田奥灰顶部注浆改造的最佳深度是进入奥灰20 m的结论。以肥城曹庄煤矿101002工作面为试验对象,对该工作面奥灰顶部进行了注浆加固工程,通过注浆前后的物探及钻探勘查成果对比分析,验证了该结论的正确性。生产实践证明,通过注浆加固奥灰顶部岩层,能够实现高承压水体上煤层的安全开采。In view that drainage for decreasing water pressure was useless to guarantee safe mining threatened by water inrush from Ordovician limestone in Feicheng coalfield, the feasibility study of grouting reinforcement of Ordovician top was carried out.Based on the statistics of exploratory boring data, coal mine drilling construction, X-ray diffraction of limestone samples, and microscopic thin sec-tion analysis, the macro and micro characteristics of Karst fissure in the Ordovician top of Feicheng coalfield were obtained.The result shows that the optimal depth for grouting reconstruction in Feicheng coalfield is about 20 meters below Ordovician top.Taking LW101002 in Caozhuang coal mine as test object, the grouting reinforcement project for Ordovician top was carried out.The conclusion validity is proved by the comparison of geophysical exploration and drilling before and after grouting.Practice proves that safety mining on the aquifer with high-pressure can be achieved by grouting reinforcement of Ordovician top.

关 键 词：奥灰 岩溶裂隙 注浆加固 突水 

分 类 号：P641.47[天文地球—地质矿产勘探]