冠山矿建筑物下重复采动可行性研究
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摘要
为探明重复采动对地面建筑物的威胁程度,提出了建立重复采动作业下地面各个移动变形值叠加的力学模型,运用开发的矿井回采地面沉陷预计系统和重复采动地面变形叠加系统,对重复采动作业下地面下沉值、倾斜变形值、水平变形值和曲率变形值进行预计和分析结合《三下规程》要求,判定重复采动作业的可行性。预测结果表明:以冠山矿0901工作面和1001工作面采动作业为例,地面建筑物在2个工作面重复采动作业的影响下,叠加系统计算出的各个最大变形值均在《三下规程》规定的Ⅰ级范围内,能够保证地面建筑物的安全使用,重复采动开采方案具有可行性。设置地面移动变形监测站,对冠山矿0901、1001工作面开采后的地面变形量进行监测,观测结果在规程规定的Ⅰ级范围内,验证了预计结果的准确性。
To find out the threat degree of repeated mining to ground buildings, a mechanical model for the superposition of various moving deformation values on the ground under repeated mining operation is proposed. The method of predicting and analyzing the subsidence value, inclined deformation value, horizontal deformation value and curvature deformation value of the ground under the repetitive mining operation is studied by using the developed subsidence prediction system of mine stope and the superposition system of ground deformation of repetitive mining. According to the requirements of Three Regulations, the feasibility of repeated mining operation is determined. The prediction results show that: taking 0901 face and 1001 face of Guanshan Mine as the examples, under the repeated mining conditions, the surface deformation values of the ground structures are all within the scope of Class I specified in Three Regulations. That is, the safe use of the building can be ensured without maintenance or simple maintenance, and repetitive mining plan is feasible. Set up a surface movement deformation monitoring station to monitor the surface deformation after the mining of 0901 and 1001 working faces in Guanshan Mine, observations are within the scope of Class I specified in Three Regulations, which verifies the accuracy of the expected result.
To find out the threat degree of repeated mining to ground buildings, a mechanical model for the superposition of various moving deformation values on the ground under repeated mining operation is proposed. The method of predicting and analyzing the subsidence value, inclined deformation value, horizontal deformation value and curvature deformation value of the ground under the repetitive mining operation is studied by using the developed subsidence prediction system of mine stope and the superposition system of ground deformation of repetitive mining. According to the requirements of Three Regulations, the feasibility of repeated mining operation is determined. The prediction results show that: taking 0901 face and 1001 face of Guanshan Mine as the examples, under the repeated mining conditions, the surface deformation values of the ground structures are all within the scope of Class I specified in Three Regulations. That is, the safe use of the building can be ensured without maintenance or simple maintenance, and repetitive mining plan is feasible. Set up a surface movement deformation monitoring station to monitor the surface deformation after the mining of 0901 and 1001 working faces in Guanshan Mine, observations are within the scope of Class I specified in Three Regulations, which verifies the accuracy of the expected result.
引文
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[3]李增琪.计算矿山压力和岩层移动的三维层体模型[J].煤炭学报,1994(2):109-121.
[4]张玉卓,仲惟林,姚建国.岩层移动的位错理论解及边界元法计算[J].煤炭学报,1987(2):21-31.
[5]邓喀中,郭广礼,谭志祥,等.采动区建筑物移动变形特性分析[J].中国矿业大学学报,2001(4):34-38.
[6]王悦汉,邓喀中,张冬至,等.重复采动条件下覆岩下沉特性的研究[J].煤炭学报,1998(5):24-29.
[7]吴立新,高均海.基于D-InSAR的煤矿区开采沉陷遥感监测技术分析[J].地理与地理信息科学,2004(2):22-25.
[8]于广明,孙洪泉,赵建锋.采矿引起地表点动态下沉的分形增长规律研究[J].岩石力学与工程学报,2001(1):34-37.
[9]谢和平,周宏伟,刘建锋,等.不同开采条件下采动力学行为研究[J].煤炭学报,2011(7):1067-1074.
[10]崔希民,张兵,彭超.建筑物采动损害评价研究现状与进展[J].煤炭学报,2015(8):1718-1728.
[11]钱鸣高,缪协兴,许家林.岩层控制中的关键层理论研究[J].煤炭学报,1996(3):2-7.
[12]题正义,柳东明,王振.辽宁灯塔西马煤矿充填式开采地表变形预测[J].中国地质灾害与防治学报,2014(4):66-71.
[13]题正义,屈年华,时星.矿山开采沉陷可视化系统设计开发及岩移参数求取[J].中国安全生产科学技术,2015(1):97-103.
[14]国家煤炭工业局.建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程[M].北京:煤炭工业出版社,2000.
[15]何国清,杨伦,凌庚娣,等.矿山开采沉陷学[M].徐州:中国矿业大学出版社,1991:118-148.