矸石充填体机械压缩过程及宽条带岩层沉降分析  

Mechanical compression process of gangue filling and settlement analysis of wide strip rock stratum

作　　者：轩召军 许磊[3,4] 相峥 蔡玲祥 郭帅 DAVIDE Elmo XUAN Zhaojun;XU Lei;XIANG Zheng;CAI Lingxiang;GUO Shuai;DAVIDE Elmo(Shandong Kangge Energy Technology Co.,Ltd.,Jining 272075,China;Shandong Province Backfill Mining Engineering Technology Research Center,Jining 272075,China;School of Civil Engineering,Hennan Polytechnic University,Jiaozuo 454000,China;Henan Key Laboratory of Underground Engineering and Disaster Prevention,Henan Polytechnic University,Jiaozuo 454000,China;Yuzhou Shenhuo Guangxin Mining Co.,Ltd.,Yuzhou 452570,China;The Norman B.Keevil Institute of Mining Engineering,University of British Columbia,Vancouver V6T 1Z4,Canada)

机构地区：[1]山东康格能源科技有限公司,山东济宁272075 [2]山东省充填开采工程技术研究中心,山东济宁272075 [3]河南理工大学土木工程学院,河南焦作454000 [4]河南理工大学河南省地下工程与灾变防控重点实验室,河南焦作454000 [5]禹州神火广鑫矿业有限公司,河南禹州452570 [6]英属哥伦比亚大学NBK矿业工程学院,加拿大温哥华V6T 1Z4

出　　处：《煤矿安全》2024年第2期125-132,共8页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51964043,52074101);河南省地下空间开发及诱发灾变防治国际联合实验室(河南理工大学)自主课题资助项目。

摘　　要：以亭南煤矿1102宽条带矸石充填工作面为工程背景,采用理论分析、数值模拟、室内试验、现场实测等方法研究了矸石机械压缩过程及岩层沉降规律。结果表明:散体矸石经2 MPa夯实后压缩了27.05%,变成矸石充填体,矸石充填体在可充填空间内机械压缩过程及架后压缩率为(各阶段压缩与可充填空间高度比值):骨架调整段(7.42%),缓慢压缩段(5.39%);机械压缩等价采高为可充填空间高度与矸石充填体2个阶段可充压缩率的乘积;1102工作面矸石充填体在骨架调整段和缓慢压缩段的等价采高分别为0.94 m和1.10 m;1102工作面走向和倾向主断面地表下沉曲线均为“碗”形,骨架调整段到缓慢压缩段过程中,地表变形曲线变化不大,最终最大下沉量分别为39 mm和41 mm。Taking 1102 gangue filling face of Tingnan Coal Mine as the research object,theoretical analysis,numerical simulation,laboratory test and field measurement were used to study the process of gangue compression and the law of strata subsidence.The results show that:after 2 MPa compaction,the bulk gangue is compressed by 27.05%to become gangue filling body,the mechanical compression process of gangue filling body in fillable space and the compression rate(the ratio of compression amount in each stage to fillable space height)are:skeleton adjustment(7.42%),slow compression(accounting for 5.39%);the equivalent mining height of mechanical compression is the product of the fillable space height and the second-stage fillable compression rate of gangue filling body.The equivalent mining height of gangue filling body in 1102 working face in skeleton adjustment and slow compression is 0.94 m and 1.10 m respectively;the surface subsidence curves of the main section of 1102 working face in strike and inclina tion are all in the shape of“bowl”.During the process from skeleton adjustment to slow compression,the surface deformation curve changed little,and the final maximum subsidence was 39 mm and 41 mm,respectively.

关 键 词：矸石充填 充填开采 等价采高 矸石夯实 宽条带 岩层沉降 

分 类 号：TD315[矿业工程—矿井建设]