多煤层采空区注浆加固设计与施工  

Design and Construction of Grouting Reinforcement for Multi Strata Goaf

作　　者：陈利生 

机构地区：[1]中煤科工集团唐山研究院有限公司,河北唐山063012

出　　处：《金属矿山》2014年第5期10-14,共5页Metal Mine

基　　金："十二五"国家科技支撑计划重点项目(编号:2012BAC13B03)

摘　　要：多煤层采空区属于隐蔽性工程,其结构复杂、稳定性差,若在其上方兴建建筑物尤其是高层建筑物时必须采取一定的治理措施,在治理之前首先应对其可行性进行专题论证,进而在论证的基础上合理组织设计与施工。结合工程实例,对多煤层采空区治理工程中涉及到的问题进行了较深入的研究:结合地质采矿资料并运用钻孔探测技术,对地基稳定性进行了分析评价;确定了注浆方案、注浆范围以及注浆孔孔位布置;在施工工艺方面对浆液材料配比、注浆段划分、浆液扩散半径以及注浆压力等参数进行了分析研究;最后运用钻探和物探技术对注浆效果进行了检测分析,并结合概率积分法,对各项地表残余变形参数进行了预计。结果表明:此次注浆达到了预期目的,为地表建筑物的安全运行提供了保障,可为其他类似工程提供一定的参考与借鉴。Multi-strata coal goaf belongs to concealed works.Due to its complex structure and being lack of stability,some measures should be taken if constructing new buildings especially high buildings on surface of goaf.Before governance,the feasibility for constructing was argued firstly,and based on the argumentation,reasonable design and construction were made.Combining with engineering example,some concerning issues in governance of multi-strata coal mined-out area were deeply studied.Based on the geological and mining data and using drilling detecting technology,the foundation＇s stability was analyzed and assessed,and the grouting range,grouting scheme,and holes arrangement were determined.In the process of construction,such parameters as the material ratio of grout,grouting section division,grouting pressure and others were studied.Finally,grouting effect was tested with the use of drilling and geophysical technology,and the surface residual deformation parameters were estimated with probability integral method.The results showed that the grouting reached the expected target and provided guarantee for the safe operation of surface buildings.This research can be used as a reference for design and construction of similar project.

关 键 词：多煤层采空区 稳定性分析 注浆设计 施工 效果检测 

分 类 号：TD853[矿业工程—金属矿开采]