采动裂隙“O形圈”时空演化规律及注浆应用  

Spatio-temporal Evolution Law of the Mining Fissure "O Type Ring" and its Application in Grouting

作　　者：赵明 吕毅 康健 苗健 林倚天 ZHAO Ming;LYU Yi;KANG Jian;MIAO Jian;LIN Yitian(General Prospecting Institute of China National Administration of Coal Geology,Beijing 100039;Xiadian Coal Mine of Lu’an Group Cilinshan Mining Co.,Ltd.,Changzhi,Shanxi 046299)

机构地区：[1]中国煤炭地质总局勘查研究总院,北京100039 [2]山西潞安矿业集团慈林山煤业有限公司夏店煤矿,山西长治046299

出　　处：《中国煤炭地质》2023年第11期55-59,共5页Coal Geology of China

基　　金：山西潞安矿业集团慈林山煤业有限公司科技项目“夏店煤矿3119工作面采动离层区注浆控制地面沉降技术研究开发及施工”(X2022-01-031);山西潞安矿业集团慈林山煤业有限公司科技项目“覆岩离层与‘O形圈’多位空间注浆关键技术及应用”(X2022-10-08)。

摘　　要：采动覆岩离层注浆充填技术对工作面隔离煤柱的尺寸有严格要求,已完成布置的工作面实施离层注浆时改变煤柱宽度较为困难,因此会对该技术的实施造成一定影响。基于此,对采动裂隙“O形圈”时空演化规律开展了理论分析和相似模拟研究,提出了采动裂隙“O形圈”注浆技术,并在夏店煤矿注浆工作面成功进行应用。注浆结束后的地表岩移成果表明,隔离煤岩柱整体支撑能力满足离层注浆承载要求,3119工作面注浆总量未发生异常,“O形圈”注浆对煤柱加固作用明显,3117面地表并未发生异常沉降。The technology of isolated grout injection into abscission layer in overlying disrupted strata by extraction has strict requirements for the size of the isolated coal pillar in the working face.It is difficult to change the width of the coal pillars when injecting grouts into abscission layer in the arranged working face,which will have a certain impact on the implementation of this technology.Based on this,theoretical analysis and similarity simulation research were conducted on the spatio-temporal evolution law of the mining fissure“O type ring”.The technology of mining fissure“O type ring”grouting was proposed and successfully applied in the grouting working face of Xiadian coal mine.The results of surface rock displacement after grouting indicate that the overall support capacity of the isolated coal pillar meets the bearing requirements of the grout injection into abscission layer.The total amount of grouting in the 3119 working face did not show any abnormalities,and the“O type ring”grouting has a significant reinforcement effect on the coal pillar.There was no abnormal subsidence on the surface of the 3117 working face.

关 键 词：离层注浆 “O形圈” 减沉 

分 类 号：TD73[矿业工程—矿井通风与安全]