| Citation: |
GUO Wenbing，HAN Mingzhen，YANG Weiqiang，et al. Research and application of maximum surface subsidence model under the condition of repeated mining in weakly cemented strata[J]. Coal Science and Technology，2023，51（9）：1−10. DOI: 10.12438/cst.2022-1814
|
The characteristics of surface subsidence under the condition of repeated mining in weakly cemented strata are of great significance to the safe and efficient mining and ecological restoration of coal resources in weakly cemented mining areas in western China. Theoretical analysis, similar simulation, numerical simulation and field monitoring are used to study the migration law of overlying strata and surface subsidence model under repeated mining conditions in weakly cemented strata, and the model is applied in engineering. The bulking characteristics of weakly cemented rock and the influence mechanism of repeated mining overburden strata movement on surface subsidence are discussed through theoretical analysis. The ‘maximum surface subsidence model under the condition of repeated mining in weakly cemented strata’ is established. There is a linear relationship between the bulking coefficient of weakly cemented rock, the mining thickness of lower coal and the maximum surface subsidence of weakly cemented strata. Through similar simulation and numerical simulation, the characteristics of repeated mining overburden and surface subsidence in weakly cemented strata are analyzed. The research results show that the development law of the separation height of the initial mining and repeated mining of the weakly cemented strata is basically the same, and both show a step-like rise. The surface subsidence curve of repeated mining is asymmetrically distributed, and the maximum subsidence value is biased towards the side of open cut. The maximum development height of overlying strata, the maximum surface subsidence value and the surface subsidence coefficient after initial mining and repeated mining are given. The established maximum surface subsidence model is used to predict the maximum surface subsidence value on site. The predicted value of the maximum surface subsidence model is similar to the measured value on site during the mining process of the working face, which verifies the rationality of the ' maximum surface subsidence model under the condition of repeated mining of weakly cemented strata '. At the same time, the predicted value of the maximum surface subsidence after the mining of the working face can provide a reference for the actual work on site.
| [1] |
王双明,段中会,马 丽,等. 西部煤炭绿色开发地质保障技术研究现状与发展趋势[J]. 煤炭科学技术,2019,47(2):1−6. doi: 10.13199/j.cnki.cst.2019.02.001
WANG Shuangming,DUAN Zhonghui,MA Li,et al. Research status and future trends of geological assurance technology for coal green development in Western China[J]. Coal Science and Technology,2019,47(2):1−6. doi: 10.13199/j.cnki.cst.2019.02.001
|
| [2] |
鞠金峰,许家林,朱卫兵. 关键层结构提前滑落失稳对浅埋近距离煤层出煤柱压架灾害的影响[J]. 煤炭学报,2015,40(9):2033−2039.
JU Jinfeng,XU Jialin,ZHU Weibing. Influence of overlying key strata structure pre-sliding on support failure disaster while mining in the lower coal seam cut across below the upper adjacent coal pillar under shallow cover[J]. Journal of China Coal Society,2015,40(9):2033−2039.
|
| [3] |
孙利辉,纪洪广,杨本生. 西部典型矿区弱胶结地层岩石的物理力学性能特征[J]. 煤炭学报,2019,44(3):866−874. doi: 10.13225/j.cnki.jccs.2018.6039
SUN Lihui,JI Hongguang,YANG Bensheng. Physical and mechanical characteristic of rocks with weakly cemented strata in Western representative mining area[J]. Journal of China Coal Society,2019,44(3):866−874. doi: 10.13225/j.cnki.jccs.2018.6039
|
| [4] |
赵永川,杨天鸿,肖福坤,等. 西部弱胶结砂岩循环载荷作用下塑性应变能变化规律[J]. 煤炭学报,2015,40(8):1813−1819. doi: 10.13225/j.cnki.jccs.2014.1192
ZHAO Yongchuan,YANG Tianhong,XIAO Fukun,et al. The variation law of plastic strain energy of western weak cemented sandstone during cyclic loading experiment[J]. Journal of China Coal Society,2015,40(8):1813−1819. doi: 10.13225/j.cnki.jccs.2014.1192
|
| [5] |
孟庆彬,韩立军,乔卫国,等. 泥质弱胶结软岩巷道变形破坏特征与机理分析[J]. 采矿与安全工程学报,2016,33(6):1014−1022.
MENG Qingbin,HAN Lijun,QIAO Weiguo,et al. Deformation failure characteristics and mechanism analysis of muddy weakly cemented soft rock roadway[J]. Journal of Mining & Safety Engineering,2016,33(6):1014−1022.
|
| [6] |
李回贵,李化敏,汪华君,等. 弱胶结砂岩的物理力学特征及定义[J]. 煤炭科学技术,2017,45(10):1−7.
LI Huigui,LI Huamin,WANG Huajun,et al. Physical and mechanical characteristics and definition of weakly cemented sandstone[J]. Coal Science and Technology,2017,45(10):1−7.
|
| [7] |
张洪彬,田成林,孙 赑,等. 浅埋煤层弱胶结顶板破断规律数值模拟研究[J]. 山东科技大学学报(自然科学版),2015,34(2):36−40.
ZHANG Hongbin,TIAN Chenglin,SUN Bi,et al. Numerical simulation of roof break laws in weakly cemented shallow seam[J]. Journal of Shandong University of Science and Technology(Natural Science),2015,34(2):36−40.
|
| [8] |
于 斌. 多煤层上覆破断顶板群结构演化及其对下煤层开采的影响[J]. 煤炭学报,2015,40(2):261−266.
YU Bin. Structural evolution of breaking roof group of multiple coal seams and its influence on lower coal seam mining[J]. Journal of China Coal Society,2015,40(2):261−266.
|
| [9] |
范立民,张晓团,向茂西,等. 浅埋煤层高强度开采区地裂缝发育特征:以陕西榆神府矿区为例[J]. 煤炭学报,2015,40(6):1442−1447. doi: 10.13225/j.cnki.jccs.2014.1707
FAN Limin,ZHANG Xiaotuan,XIANG Maoxi,et al. Characteristics of ground fissure development in high intensity mining area of shallow seam in Yushenfu coal field[J]. Journal of China Coal Society,2015,40(6):1442−1447. doi: 10.13225/j.cnki.jccs.2014.1707
|
| [10] |
范立民,马雄德,李永红,等. 西部高强度采煤区矿山地质灾害现状与防控技术[J]. 煤炭学报,2017,42(2):276−285.
FAN Limin,MA Xiongde,LI Yonghong,et al. Geological disasters and control technology in high intensity mining area of western China[J]. Journal of China Coal Society,2017,42(2):276−285.
|
| [11] |
马军前,仝 昕,李成银. 弱胶结地层采动覆岩活动规律及渗透性演化特征研究[J]. 煤炭科学技术,2020,48(S2):11−16.
MA Junqian,TONG Xin,LI Chengyin. Study on movement laws and permeability evolution features of mining-induced overburden in weakly cemented strata[J]. Coal Science and Technology,2020,48(S2):11−16.
|
| [12] |
李 杨,王建鹏,陈一鼎,等. 多煤层开采中间岩层对覆岩移动的影响研究[J]. 煤炭科学技术,2020,48(4):246−255.
LI Yang,WANG Jianpeng,CHEN Yiding,et al. Study on effect of interburden on movement of overburden in multiple coal seams[J]. Coal Science and Technology,2020,48(4):246−255.
|
| [13] |
ZHANG Guojian,GUO Guangli,LYU Yinan,et al. Study on the strata movement rule of the ultrathick and weak cementation overburden in deep mining by similar material simulation: a case study in China[J]. Mathematical Problems in Engineering,2020,2020:7356740.
|
| [14] |
ZHANG Guojian,GUO Guangli,SHEN Shikai,et al. Numerical simulation study of the strata movement rule of deep mining with the super-thick and weak cementation overburden: a case study in China[J]. Mathematical Problems in Engineering,2021,2021:6806703.
|
| [15] |
陈 凯,葛 颖,张 全,等. 基于离散元模拟的巨厚煤层分层开采覆岩裂隙演化分形特征[J]. 工程地质学报,2021,29(4):1113−1120.
CHEN Kai,GE Ying ZHANG Quan,et al. Discrete element simulation for crack fractal evolution laws associated with slicing mining in super thick coal stratum[J]. Journal of Engineering Geology,2021,29(4):1113−1120.
|
| [16] |
郭文兵. 煤矿开采损害与保护[M]. 北京: 应急管理出版社, 2019.
|
| [17] |
张冬至,邓喀中,周 鸣. 采动岩体碎胀系数变化规律研究[J]. 江苏煤炭,1998(1):3−5.
ZHANG Dongzhi,DENG Kazhong,ZHOU Ming. Study on the variation of coefficient of fragmentation and expansion of mining rock mass[J]. Jiangsu Coal,1998(1):3−5.
|
| [18] |
邓喀中,周 鸣,谭志祥,等. 采动岩体破裂规律的试验研究[J]. 中国矿业大学学报,1998,27(3):43−46.
DENG Kazhong,ZHOU Ming,TAN Zhixiang,et al. Study on laws of rock mass breaking induced by mining[J]. Journal of China University of Mining & Technology,1998,27(3):43−46.
|
| [19] |
孙利辉. 西部弱胶结地层大采高工作面覆岩结构演化与矿压活动规律研究[J]. 岩石力学与工程学报,2017,36(7):1820.
SUN Lihui. Structural evolution and rock pressure activity regularity of weakly cemented strata of the large mining height work face in Western China[J]. Chinese Journal of Rock Mechanics and Engineering,2017,36(7):1820.
|
| [20] |
李凤明. 重复采动条件下地表移动参数变化机理及移动盆地特点[J]. 煤炭科学技术,1998,26(2):44−47.
LI Fengming. Changing mechanism of surface movement parameters and subsidence basin characteristics during repeat mining[J]. Coal Science and Technology,1998,26(2):44−47.
|
| [21] |
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,1998,23(5):24−29. doi: 10.3321/j.issn:0253-9993.1998.05.005
WANG Yuehan,DENG Kazhong,ZHANG Dongzhi,et al. The study on the character of strata subsidence during repeat mining[J]. Journal of China Coal Society,1998,23(5):24−29. doi: 10.3321/j.issn:0253-9993.1998.05.005
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: