充填膏体长期稳定性研究  

Reserch on long-term stability of filling paste

作　　者：鲁建国 张志勇 张新国 李飞帆[2] 王星宇 Lu Jianguo;Zhang Zhiyong;Zhang Xinguo;Li Feifan;Wang Xingyu(Inner Mongolia Coal Industry Professional Technical Service Center,H uhhot,Inner Mongolia 010010,China;College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;State Key Laboratory of Mine Disaster Prevention and Control,Co-sponsored by Shandong Province and Ministry of Education,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]内蒙古自治区煤炭工业专业技术服务中心,内蒙古自治区呼和浩特市010010 [2]山东科技大学矿业与安全工程学院,山东省青岛市266590 [3]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东省青岛市266590

出　　处：《中国煤炭》2018年第9期123-127,共5页China Coal

基　　金：国家自然科学基金资助项目(51574159);中国博士后科学基金资助项目(2015M572068);中国博士后科学基金第九批特别资助(2016T90662);山东省科学基金资助项目(ZR2014EEM001)

摘　　要：针对目前膏体充填技术在控制地表沉陷中难以保持充填膏体长期稳定性的问题,现以岱庄矿煤炭膏体充填为研究背景,采取现场取芯和室内试验的方法,研究了充填膏体与该矿3煤的力学特性,并进行了对比分析,在此基础上运用理论分析研究了充填膏体长期稳定性。研究结果表明,充填膏体与煤的原位强度分别是为4.06 MPa和3.39 MPa,两者相差不大,充填膏体可置换出条带开采遗留的煤柱;充填膏体弹性模量为409.70~1036.044MPa,平均为701.93 MPa,该值较大,有利于充填膏体保持长期稳定性;条带充填膏体的安全系数为5.8,远大于充填体稳定性安全系数2.0,可保证充填膏体长期稳定性。相关研究对评价充填效果和指导安全生产具有重要的意义。In view of the present paste filling technique,the filling paste was difficult to maintain the long-term stability in controlling surface subsidence.Taking paste filling in Daizhuang Coal Mine as research background,the mechanical properties of filling paste and No.3 coal seam was studied and analyzed contrastively by the methods of site coring test and laboratory test,and based upon the results,the long-term stability of filling paste was studied by theoretical analysis.The results showed that in-situ strengths of filling paste and coal were respectively 4.05 MPa and 3.39 MPa,almost the same,so the filling paste could take the place of coal pillar remained by strip mining;the elasticity modulus of the filling paste was 409.7~1036.044 MPa,701.93 MPa averagely,which was relatively large and beneficial to the long-term stability;the strip filling paste＇s safety coefficient was 5.8,that was much larger than the filling body＇s stability safety coefficient 2.0,and could ensure the long-term stability of filling paste.The related research was of great significance for evaluating the filling effect and guiding the safety production.

关 键 词：充填膏体 岩石力学实验 理论分析 长期稳定性 

分 类 号：TD853.34[矿业工程—金属矿开采]