采动影响区房屋损害地表移动变形临界值研究

徐乃忠1,2,3,高一超1,2,刘一贵1,2,孙万明1,2

(1．天地科技股份有限公司开采设计事业部,北京100013;2．煤炭科学研究总院开采研究分院,北京100013;3．中国煤炭学会煤矿开采损害技术鉴定委员会,北京100013)

[摘一要]一采动影响区地表移动变形通过房屋基础与周围土体的摩擦力传递给上部结构,在房

屋墙体内产生附加应力,当移动变形超过墙体的扰动影响最大承受值时,导致房屋拉破坏或压破坏,

对采动区地表房屋造成损害三为解决采煤沉陷区矿方与百姓就房屋损害技术鉴定责任划分,以及村庄

下开采工作面合理布置与尺寸优化问题,分析了地表水平变形与房屋墙体水平变形的关系,应用多研

究手段推导出采动区房屋损害地表水平变形临界值的计算公式;同时引入了房屋损害裂缝角的概念,

并提出了该角值的理论计算方法三结果表明:地表水平拉伸变形达到0．61mm /m ,而水平压缩变形达

到-1．33mm /m ,采动影响区房屋墙体将会在薄弱部位出现采动裂缝,从而对房屋造成开采损害;矿

区房屋损害裂缝角临界值约为58?,房屋裂缝角介于边界角和移动角之间三

[关键词]一房屋损害;地表移动变形;临界水平变形;墙体附加应力;房屋损害裂缝角

[中图分类号]TD823．83一[文献标识码]A一[文章编号]1006-6225(2017)04-0065-05Study of Surface Movement Deformation Critical Value of House Damage in Mining Influence Area

XU Nai-zhong 1,2,3,GAO Chao 1,2,LIU Gui 1,2,SUN Wan-ming 1,2

(1．Coal Mining &Designing Department,Tiandi Science &Technology Co．,Ltd．,Beijing 100013,China;

2．Mining Institute,China Coal Research Institute,Beijing 100013,China;3．Coal Mining Damage Technology Authentication Board,China Coal Society,Beijing 100013,China)Abstract :Surface movement deformation of mining influence area was transferred to upper structure by house base and friction of sur-round soil,and additional stress appeared inner wall body of house,when movement deformation exceed the largest loading value of wall disturbance,then house would appeared pull or push failure,and surface house of mining area would damage．In order to solve responsibility division of mine and command people to house damage technology authentication in mining subsidence area,and some problems like mining working face layout and size optimization under village,then the relation between surface horizontal deformation and house wall horizontal deformation was analyzed,and the concept house damage fracture angle was put forward,and its theory cal-culation method was put forward also．The results showed that when surface horizontal tensile deformation was 0．61mm /m,and hori-zontal compress deformation was -1．33mm /m,then house wall would appeared mining fracture in weak part,then house would dam-aged,the critical value of mine area damage fracture angle was about 58?,it between boundary angle and moving angle．

Key words :house damage;surface movement deformation;critical horizontal deformation;wall additional stress;house damage fracture angle [收稿日期]

2016-11-21[DOI]10．13532/j．cnki．cn11-3677/td．2017．04．017[基金项目]

国家科技重大专项:煤与煤层气协调开发模式及技术的优化集成应用(2016ZX05045-007)[作者简介]

徐乃忠(1961-),男,江苏建湖人,博士,研究员,博士生导师,主要从事开采沉陷研究与应用方面工作三[引用格式]徐乃忠,高一超,刘一贵,等．采动影响区房屋损害地表移动变形临界值研究[J ].煤矿开采,2017,22(4):65-69．

一一我国煤炭资源储量大二分布范围广, 三下压煤量大,特别是华北二东北和华中地区三据不完全统计,我国大中型矿井三下压煤量达到14Gt,其中建筑物下压煤量为8．76Gt,并且建筑物下压煤量的60%为村庄下压煤[1]三地面建筑设施是人类生活与生存的必要条件,井下煤矿开采将造成地表出现不同程度的变形,进行建筑物下安全采煤的关键是在建筑物本身抵抗变形能力的基础上,保证建筑物安全使用三地表变形值大于临界变形值后,建筑物会出现不同程度的破

坏三国外于15世纪就已涉及建筑物下采煤工作,

我国建筑物下采煤的研究试验工作始于20世纪50

年代初,经过60余年的研究与实践,形成具有中

国特色的建筑物下采煤成果:建筑物下采煤的主要

方法有全柱开采二条带开采二房柱式开采二协调开

采二限厚开采二充填开采二离层区注浆开采[2]二

留设不规则煤柱开采等三在煤矿沉陷区内,地面建筑物的损害过程是一

个动态二复杂的过程,人们也越来越重视煤矿开采

造成的建筑物损害问题三在采煤实践过程中,建筑5

6第22卷第4期(总第137期)2017年8月煤一矿一开一采COAL MINING TECHNOLOGY Vol．22No．4(Series No．137)August一2017

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