CHI Mingbo，WU Baoyang，CAO Zhiguo，et al. Research on instability mechanism and precursory information of coal pillar dam of underground reservoir in coal mine[J]. Coal Science and Technology，2023，51（S2）：36−49
. DOI: 10.12438/cst.2022-1906| Citation: |
CHI Mingbo，WU Baoyang，CAO Zhiguo，et al. Research on instability mechanism and precursory information of coal pillar dam of underground reservoir in coal mine[J]. Coal Science and Technology，2023，51（S2）：36−49 . DOI: 10.12438/cst.2022-1906
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Coal mine underground reservoir is one of the key technologies to solve the protection and utilization of water resources in western mining areas. The basis for maintaining the safe operation of the reservoir is engineering safety, and the dam body is the core to ensure engineering safety. This paper studies the safety and stability of coal pillar dam of underground reservoir in coal mine. The stress variation (vertical stress and horizontal stress), fracture development and expansion, displacement variation and other multi-parameter variation laws during the failure of coal pillar dam are comprehensively analyzed based on mechanical model, similarity simulation and numerical calculation methods, from the angle of roof rock pressure (vertical stress) and water storage height (horizontal stress). This paper studies the variation characteristics of various parameters during the failure of coal pillar dam, and puts forward the key information of coal pillar dam failure precursors, which provides the basis for the safe operation monitoring and early warning of on-site coal mine underground reservoir. The results show that under the action of vertical stress, the location of coal pillar dam damage caused by overburden stress is the dam roof on the side of underground reservoir of coal mine. The smaller the size of coal pillar is, the easier it is to produce stress concentration. The greater the bearing stress is, the greater the possibility of damage is. Based on this, the failure critical point of coal pillar dam is obtained. Under the action of horizontal stress, the coal pillar dam body experiences three processes: elastic stage, initial failure stage and failure increase stage. The coal pillar dam body shows obvious displacement only after reaching the ultimate strength. At this time, the coal pillar dam body is damaged. After the horizontal stress decreases, the displacement has a rebound trend, but the overall stability of the coal pillar dam body is affected and it is not suitable to continue water storage. The analysis of the main factors causing the instability of the coal pillar dam shows that under the combined action of vertical stress and horizontal stress, the instability of the coal pillar dam is mainly at the top plate, bottom plate and middle position of the small-size dam near the reservoir. Taking Shangwan mine as an example, the maximum bearing head height of the coal pillar dam is 50m, but the coal pillar dam has been damaged at this time. Even if the water level is lowered, the overall stability of the coal pillar dam is irreparably damaged. Comprehensive study of the characteristics and laws of coal pillar dam instability in coal mine underground reservoirs, combined with displacement changes and the physical and mechanical properties of coal pillar dams, obtained the precursor information of coal pillar dam failure, that is, respond to the reservoir before reaching the ultimate strength under the action of external force. For safety measures, it is recommended to focus on monitoring the stress change information of the coal pillar roof with a smaller size on the reservoir side during on-site monitoring and early warning to ensure the safe operation of coal mine underground reservoirs. The research results provide a basis for monitoring and early warning methods for the safety and stability of coal pillar dams in coal mine underground reservoirs.
| [1] |
白二虎,郭文兵,张合兵,等. 黄河流域中上游煤-水协调开采的地下水原位保护技术[J]. 煤炭学报,2021,46(2):1−7.
BAI Erhu,GUO Wenbing,ZHANG Hebing,et al. In situ groundwater protection technology based on mining-conservation coor-dination in the middle and upper reaches of Yellow River Basin[J]. Journal of China Coal Society,2021,46(2):1−7.
|
| [2] |
靳德武. 我国煤矿水害防治技术新进展及其方法论思考[J]. 煤炭科学技术,2017,45(5):141−147.
JIN Dewu. New development of water disaster prevention and control technology in China coal mine and consideration on methodology[J]. Coal Science and Technology,2017,45(5):141−147.
|
| [3] |
张东升,李文平,来兴平,等. 我国西北煤炭开采中的水资源保护基础理论研究进展[J]. 煤炭学报,2017,42(1):36−43.
ZHANG Dongsheng,LI Wenping,LAI Xingping,et al. Development on basic theory of water protection during coal mining in northwest of China[J]. Journal of China Coal Society,2017,42(1):36−43.
|
| [4] |
鞠金峰,许家林,朱卫兵. 西部缺水矿区地下水库保水的库容研究[J]. 煤炭学报,2017,42(2):381−387.
JU Jinfeng,XU Jialin,ZHU Weibing. Storage capacity of underground reservoir in the Chinese western water-short coalfield[J]. Journal of China Coal Society,2017,42(2):381−387.
|
| [5] |
CHI M,ZHANG D,FAN G,et al. Prediction of water resource carrying capacity by the analytic hierarchy process-fuzzy discrimination method in a mining area[J]. Ecological Indicators,2019,96:647−655. doi: 10.1016/j.ecolind.2018.09.021
|
| [6] |
WANG Q ,LI W ,LI T ,et al. Goaf water storage and utilization in arid regions of northwest China:a case study of Shennan coal mine district[J]. Journal of Cleaner Production,2018,202:33-44.
|
| [7] |
曹志国,李全生,董斌琦,等. 煤矿地下水库技术标准体系构建与制定[J]. 煤矿安全,2016,47(10):242−245.
CAO Zhiguo,LI Quansheng,DONG Binqi,et al. Construction and formulation of technical standards for underground reservoir of coal mine[J]. Safety in Coal Mines,2016,47(10):242−245.
|
| [8] |
顾大钊. 煤矿地下水库理论框架和技术体系[J]. 煤炭学报,2015,40(2):239−246.
GU Dazhao. Theory framework and technological system of coal mine underground reservoir[J]. Journal of China Coal Society,2015,40(2):239−246.
|
| [9] |
吴宝杨. 煤矿分布式地下水库煤柱坝体合理布置方式[J]. 煤矿安全,2018,49(9):68−72.
WU Baoyang. Reasonable arrangement mode about coal pillar dam of distributed groundwater reservoir in coal mine[J]. Safety in Coal Mines,2018,49(9):68−72.
|
| [10] |
刘晓丽,曹志国,陈苏社,等. 煤矿分布式地下水库渗流场分析及优化调度[J]. 煤炭学报,2019,44(12):3693−3699.
LIU Xiaoli,CAO Zhiguo,CHEN Sushe,et al. Seepage field analysis and optimal schedule of distributed underground reservoir in mining area[J]. Journal of China Coal Society,2019,44(12):3693−3699.
|
| [11] |
顾大钊,颜永国,张 勇,等. 煤矿地下水库煤柱动力响应与稳定性分析[J]. 煤炭学报,2016,41(7):1589−1597.
GU Dazhao,YAN Yongguo,ZHANG Yong,et al. Experimental study and numerical simulation for dynamic response of coal pillars in coal mine underground reservoir[J]. Journal of China Coal Society,2016,41(7):1589−1597.
|
| [12] |
WANG B,LIANG B,WANG J,et al. Experiment study on rock bulking of coal mine underground reservoir[J]. Rock and Soil Mechanics,2018,39(11):4086−4092.
|
| [13] |
张百胜,王朋飞,崔守清,等. 大采高小煤柱沿空掘巷切顶卸压围岩控制技术[J]. 煤炭学报,2021,46(7):2254−2267.
ZHANG Baisheng,WANG Pengfei,CUI Shouqing,et al. Mechanism and surrounding rock control of roadway driving along gob in shallow-buried,large mining height and small coal pillars by roof cutting[J]. Journal of China Coal Society,2021,46(7):2254−2267.
|
| [14] |
陈冬冬,武毅艺,谢生荣,等. 弹-塑性基础边界一侧采空基本顶板结构初次破断研究[J]. 煤炭学报,2021,46(10)3090−3105.
CHEN Dongdong,WU Yiyi,XIE Shengrong,et al. Study on the first fracture of the main roof plate structure with one side goaf and elastic-plastic foundation boundary[J]. Journal of China Coal Society,2021,46(10)3090−3105.
|
| [15] |
赵洪宝,程 辉,王 磊,等. 非静水压力条件下巷道围岩偏应力场分布特征与围岩破坏规律[J]. 煤炭学报,2021,46(2):370−381.
ZHAO Hongbao,CHENG Hui,WANG Lei,et al. Distribution characteristics of deviatoric stress field and failure law of roadway surrounding rock under non-hydrostatic pressure[J]. Journal of China Coal Society,2021,46(2):370−381.
|
| [16] |
方志远,鞠金峰,曹志国,等. 基于正交异性板模型的煤矿地下水库人工坝体结构优化[J]. 煤炭学报,2020,45(4):1375−1384.
FANG Zhiyuan,JU Jinfeng,CAO Zhiguo,et al. Structural optimization of artificial dam body in coal mine underground reservoir based on orthotropic plate model[J]. Journal of China Coal Society,2020,45(4):1375−1384.
|
| [17] |
CHI M,ZHANG D,ZHAO Q,et al. Determining the scale of coal mining in an ecologically fragile mining area under the constraint of water resources carrying capacity[J]. Journal of Environmental Management,2021,279:111621.
|
| [18] |
姚强岭,郝 琪,陈翔宇,等. 煤矿地下水库煤柱坝体宽度设计[J]. 煤炭学报,2019,44(3):891-899.
YAO Qiangling,HAO Qi,CHEN Xiangyu,et al. Design on the width of coal pillar dam in coal mine groundwater reservoir[J]. Journal of China Coal Society,2019,44( 3) :890-898.
|
| [19] |
白东尧. 李家壕煤矿地下水库坝体稳定性研究[D]. 徐州:中国矿业大学,2018.
BAI Dongyao. Stability analysis of underground reservoir dam in Lijiahao mine[D]. Xuzhou:China University of Mining and Technology,2018.
|
| [20] |
张 村,韩鹏华,王方田,等. 采动水浸作用下矿井地下水库残留煤柱稳定性[J]. 中国矿业大学学报,2021,50(2):220−227.
ZHANG Cun,HAN Penghua,WANG Fangtian,et al. The stability of residual coal pillar in underground reservoir with the effect of mining and water immersion[J]. Journal of China University of Mining & Technology,2021,50(2):220−227.
|
| [21] |
宋 鹏. 多煤层开采煤柱效应及沿空巷道稳定性控制对策研究[D]. 北京:中国矿业大学(北京),2019.
SONG Peng. Study on coal pillar effect of multi-seam mining and stabilitycontrol countermeasure of gob-side entry[D]. Beijing:China University of Mining and Technology(Bei Jing),2018.
|
| [22] |
郭文豪,曹安业,温颖远,等. 鄂尔多斯矿区典型厚顶宽煤柱采场冲击地压机理[J]. 采矿与安全工程学报,2021,38(4):720−729.
GUO Wenhao,CAO Anye,WEN Yingyuan,et al. Mechanism of rockburst in stopes with typical thick roof and wide coal pillars in Ordos mlnlng area[J]. Journal of China Coal Society,2021,38(4):720−729.
|
| [23] |
张洪伟,万志军,张 源,等. 工作面顺序接续下综放沿空掘巷窄煤柱稳定性控制[J]. 煤炭学报,2021,46(4):1211−1219.
ZHANG Hongwei,WAN Zhijun,ZHANG Yuan,et al. Stability control of narrow coal pillars in the fully-mechanized gob-side entry during sequenced top coal caving mining[J]. Journal of China Coal Society,2021,46(4):1211−1219.
|
| [24] |
齐学元,邓广哲,黄 康. 近距离煤层房柱区煤柱底板应力传递规律[J]. 西安科技大学学报,2021,41(4):649−656.
QI Xueyuan,DENG Guangzhe,HUANG Kang. Stress transfer law of coal-pillar floor in room-pillar area of close distance coal seam[J]. Journal of Xi’an University of Science and Technology,2021,41(4):649−656.
|
| [25] |
黄 鹏. 煤岩蠕变损伤机理及工作面临空区段煤柱稳定性研究[D]. 徐州:中国矿业大学,2018.
HUANG Peng. Study on the creep damage mechanism of coal petrography and Gob-side coal pillar stability [D]. Xuzhou:China University of Mining and Technology,2018.
|
| [26] |
MENÉNDEZ J ,LOREDO J ,GALDO M,et al. Energy storage in underground coal mines in NW Spain:Assessment of an underground lower water reservoir and preliminary energy balance [J]. Renewable Energy,2019,134:1381−1391.
|
| [27] |
苗彦平. 浅埋煤层水库旁开采隔水保护煤柱宽度留设理论与试验研究[D]. 西安:西安科技大学,2017.
MIAO Yanping. Theoretical and experimental research on the reasonable width desion of water barrier pillars for mining around reservoir in shallow coal seam[D]. Xi’an :Xi’an University of Science and Technolog,2017.
|
| [28] |
WANG B ,XING J,LIANG B,et al. Experimental study on deformation characteristics of rock and coal under stress-fluid interactions in coal mine underground water reservoir. Energy sources [J]. Recovery,Utilization,and Environmental Effects,2020,Part A:1-16.
|
| [29] |
涂 敏,林远东,张向阳,等. 大空间孤岛采场覆岩结构演化与区段煤柱合理宽度研究[J]. 采矿与安全工程学报,2021,38(5):857−865.
TU Min,LIN Yuandong,ZHANG Xiangyang,et al. Evolution of overburden structure and reasonable width of section coal pillar in large space isolated island stope[J]. Journal of Mining& Safety Engineering,2021,38(5):857−865.
|
| [30] |
张 杰,王 斌. 浅埋间隔采空区隔离煤柱稳定性及覆岩失稳特征研究[J]. 采矿与安全工程学报,2020,37(5):936−942.
ZHANG Jie,WANG Bin. Stability of isolated coal pillar and overburden instability in shallow-buried interval gob[J]. Journal of Mining& Safety Engineering,2020,37(5):936−942.
|
| [31] |
YANG L,XU J,FANG J,et al. Risk evaluation of groundwater leakage in coal seam goaf:a case study in the Lingxin Mining Area[J]. Environmental Science and Pollution Research,2020,27:26066−26078. doi: 10.1007/s11356-020-08995-8
|
| [32] |
吴文达. 浅埋煤层群上部遗留煤柱联动失稳压架机理与控制研究[D]. 徐州: 中国矿业大学,2020.
WU Wenda. Study on mechanism and control of the support crushing disaster caused by interactive failure of upper residual pillars in shallow multiple coal seams [D]. Xuzhou:China University of Mining and Technology,2020.
|
| [33] |
D MA B H W Y. Mechanical behavior of a coal seam penetrated by a karst collapse pillar:mining-induced groundwater inrush risk[J]. Natural Hazards,2015,3(75):2137−2151.
|
| [34] |
乔 伟,靳德武,王 皓,等. 基于云服务的煤矿水害监测大数据智能预警平台构建[J]. 煤炭学报,2020,45(7):2619−2627.
QIAO Wei,JIN Dewu,WANG Hao,et al. Development of big data intelligent early warning platform for coal mine water hazard monitoring based on cloud service[J]. Journal of China Coal Society,2020,45(7):2619−2627.
|
| [35] |
文志杰,姜鹏飞,景所林,等. 煤矿地下水库底板渗流模拟试验系统研制及验证[J]. 煤炭学报,2021,46(5):1487−1497.
WEN Zhijie,JIANG Pengfei,JING Suolin,et al. Development and verification of simulation testing system for floor seepage in coal mine underground reservoir[J]. Journal of China Coal Society,2021,46(5):1487−1497.
|
| [36] |
池明波,李 鹏,曹志国,等. 煤矿地下水库平板型人工坝体抗震性能分析析[J]. 煤炭学报,2023,48,(3):1179−1191.
CHI Mingbo,LI Peng,CAO Zhiguo,et al. Seismic Performance Analysis of Flat Artificial Dam of Underground Reservoir in Coal Mine[J]. Journal of China Coal Society,2023,48,(3):1179−1191.
|
| [37] |
WANG F,LIANG N,LI G. Damage and failure evolution mechanism for coal pillar dams affected by water immersion in underground reservoirs[J]. Geofluids,2019(1):1−12.
|
| [38] |
YAO Q,TANG C,XIA Z,et al. Mechanisms of failure in coal samples from underground water reservoir[J]. Engineering Geology,2020,267:105494. doi: 10.1016/j.enggeo.2020.105494
|
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