| Citation: |
CHEN Jianqiang，SONG Dazhao，CHANG Bo，et al. Static-dynamic rockburst risk assessment method in near-vertical coal seams[J]. Coal Science and Technology，2023，51（9）：24−34. DOI: 10.12438/cst.2022-1256
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The existing rockburst risk assessment methods generally belong to static assessment method which normally depends on the geological and mining conditions that are revealed prior to mining. There is commonly a certain gap between the assessment results and the real situation. How to combine with the monitoring data in the mining process to get more realistic evaluation results is a problem that needs to be further solved. To this end, this work proposes a static-dynamic coupling rockburst risk assessment method taking into account the geological and mining conditions as well as the monitoring data, and the method has been being applied in typical panels in near-vertical coal seams. Firstly, a static evaluation method used before mining based on the improved comprehensive index method is proposed. The evaluation indicators contained in the comprehensive index method are linearly normalized to obtain the single indicator risk index. The AHP method is used to assign weights to each evaluation indicator, and the weighted summation of all indicator risk indexes is calculated to obtain the risk indexes determined by geological factors and mining technology factors, respectively. Then the weighted mean of the two risk indexes is used as the static evaluation risk index. Secondly, a dynamic evaluation method used during mining by utilizing the monitoring data is constructed. According to the characteristics of microseismic monitoring and borehole stress monitoring and their relationship with rockburst risk, the dynamic evaluation indicators are constructed based on the microseismic energy density and borehole stress variation. The evaluation indicators are linearly normalized to obtain two evaluation indexes. The weighted mean of the two indexes is used as the dynamic evaluation risk index. Finally, the two proposed methods are combined to get a static-dynamic coupling evaluation model. The coupling evaluation risk index is obtained by weighted average of the static evaluation risk index and the dynamic evaluation risk index, and then the risk grade and risk area are determined. The method is applied in +450B3+6 panel of Wudong Coal Mine. Results show that the static evaluation method demarcates 4 medium risk areas and 1 weak risk area before the mining of the panel, the dynamic evaluation method determines that the rock pillar side has high risk level in the mining process of the panel, and the static dynamic coupling evaluation re-evaluates the weak risk area of the static evaluation to the medium risk area. By investigating the monitoring data of support pressure, the numerical simulation results and the rockburst occurrence on site during the mining process of the panel, the evaluation results are verified, and it is found that the static and dynamic coupling evaluation results are more consistent with the actual situation. This work provides a new method and a new idea for the risk assessment of rock burst.
| [1] |
LI Zhenlei,HE Xueqiu,DOU Linming,et al. Numerical investigation of load shedding and rockburst reduction effects of top-coal caving mining in thick coal seams[J]. International Journal of Rock Mechanics and Mining Sciences,2018,110:266−278. doi: 10.1016/j.ijrmms.2018.08.005
|
| [2] |
于正兴,姜福兴,桂 兵. 冲击地压危险性的宏观评价方法在“孤岛”工作面的应用[J]. 矿业安全与环保,2011,38(5):30−32. doi: 10.3969/j.issn.1008-4495.2011.05.011
YU Zhengxing,JIANG Fuxing,GUI Bing. Application of macroscopic evaluation method of rockburst risk in “isolated island” face[J]. Mining Safety & Environmental Protection,2011,38(5):30−32. doi: 10.3969/j.issn.1008-4495.2011.05.011
|
| [3] |
冀贞文,孙春江,姜福兴. 波兰煤矿冲击地压防治技术现状及分析[J]. 煤炭科学技术,2008,36(1):11−14. doi: 10.13199/j.cst.2008.01.16.jizhw.012
JI Zhenwen,SUN Chunjiang,JIANG Fuxing. Present status and analysis on rock burst prevention and control technology in Poland[J]. Coal Science and Technology,2008,36(1):11−14. doi: 10.13199/j.cst.2008.01.16.jizhw.012
|
| [4] |
ZHU Z,WU Y,HAN J. A prediction method of coal burst based on analytic hierarchy process(AHP) and fuzzy comprehensive evaluation(FCE)[J]. Frontiers in Earth Science,2022,9:834958.
|
| [5] |
舒凑先. 陕蒙接壤矿区深部富水工作面冲击地压机理与防治研究[D]. 北京: 北京科技大学, 2019.
SHU Couxian. The mechanism and prevention of rock burst at the water-rich working face in the deep zone of mine in the adjacent area of Shaanxi and Inner Mongolia[D]. Beijing: University of Science and Technology Beijing, 2019.
|
| [6] |
宋来智,王同旭,何 勇,等. 基于可能性指数诊断法的半孤岛工作面冲击地压危险评价[J]. 煤矿安全,2015,46(8):209−211,215.
SONG Laizhi,WANG Tongxu,HE Yong,et al. Rock burst evaluation of half isolated island face by probability index diagnosis method[J]. Safety in Coal Mines,2015,46(8):209−211,215.
|
| [7] |
姜福兴,史先锋,王存文,等. 高应力区分层开采冲击地压事故发生机理研究[J]. 岩土工程学报,2015,37(6):1123−1131. doi: 10.11779/CJGE201506019
JIANG Fuxing,SHI Xianfeng,WANG Cunwen,et al. Mechanical mechanism of rock burst accidents in slice mining face under high pressure[J]. Chinese Journal of Geotechnical Engineering,2015,37(6):1123−1131. doi: 10.11779/CJGE201506019
|
| [8] |
张宏伟,荣 海,陈建强,等. 基于地质动力区划的近直立特厚煤层冲击地压危险评价[J]. 煤炭学报,2015,40(12):2755−2762.
ZHANG Hongwei,RONG Hai,CHEN Jianqiang,et al. Risk assessment of rockburst based on geo-dynamic division method insuberect and extremely thick coal seam[J]. Journal of China Coal Society,2015,40(12):2755−2762.
|
| [9] |
张宏伟,孟庆男,韩 军,等. 地质动力区划在冲击地压矿井中的应用[J]. 辽宁工程技术大学学报(自然科学版),2016,35(5):449−455. doi: 10.11956/j.issn.1008-0562.2016.05.001
ZHANG Hongwei,MENG Qingnan,HAN Jun,et al. Application of the geological dynamic division in rock burst coal mine[J]. Journal of Liaoning Technical University: (Natural Science),2016,35(5):449−455. doi: 10.11956/j.issn.1008-0562.2016.05.001
|
| [10] |
陈 蓥,张宏伟,韩 军,等. 基于地质动力区划的矿井动力环境研究[J]. 世界地质,2011,30(4):690−696. doi: 10.3969/j.issn.1004-5589.2011.04.027
CHEN Ying,ZHANG Hongwei,HAN Jun,et al. Research on mine dynamic environment based on geo-dynamic division[J]. World Geology,2011,30(4):690−696. doi: 10.3969/j.issn.1004-5589.2011.04.027
|
| [11] |
冯宜语,刘同策,尹增德,等. 多因素耦合法评定工作面冲击地压危险性[J]. 煤矿安全,2013,44(8):196−199.
FENG Yiyu,LIU Tongce,YIN Zengde,et al. Coalface rock burst evaluation by multifactor coupling method[J]. Safety in Coal Mines,2013,44(8):196−199.
|
| [12] |
窦林名, 何学秋. 冲击矿压防治理论与技术[M]. 徐州: 中国矿业大学出版社, 2001.
|
| [13] |
姜福兴,刘 懿,翟明华,等. 基于应力与围岩分类的冲击地压危险性评价研究[J]. 岩石力学与工程学报,2017,36(5):1041−1052. doi: 10.13722/j.cnki.jrme.2016.1203
JIANG Fuxing,LIU Yi,ZHAI Minghua,et al. Evaluation of rock burst hazard based on the classification of stress and surrounding rock[J]. Chinese Journal of Rock Mechanics and Engineering,2017,36(5):1041−1052. doi: 10.13722/j.cnki.jrme.2016.1203
|
| [14] |
曹安业,王常彬,窦林名,等. 临近断层孤岛面开采动力显现机理与震动波CT动态预警[J]. 采矿与安全工程学报,2017,34(3):411−417. doi: 10.13545/j.cnki.jmse.2017.03.002
CAO Anye,WANG Changbin,DOU Linming,et al. Dynamic manifestation mechanism of mining on the island coalface along fault and dynamic pre-warning of seismic waves with seismic tomography[J]. Journal of Mining & Safety Engineering,2017,34(3):411−417. doi: 10.13545/j.cnki.jmse.2017.03.002
|
| [15] |
张科学,亢 磊,何满潮,等. 矿井煤层冲击危险性多层次综合评价研究[J]. 煤炭科学技术,2020,48(8):82−89. doi: 10.13199/j.cnki.cst.2020.08.010
ZHANG Kexue,KANG Lei,HE Manchao,et al. Research on multi-level comprehensive evaluation of coal seam rock burst risk in underground mine[J]. Coal Science and Technology,2020,48(8):82−89. doi: 10.13199/j.cnki.cst.2020.08.010
|
| [16] |
HE Shengquan,SONG Dazhao,LI Zhenlei,et al. Mechanism and prevention of rockburst in steeply inclined and extremely thick coal seams for fully mechanized top-coal caving mining and under gob filling conditions[J]. Energies,2020,13(6):1362. doi: 10.3390/en13061362
|
| [17] |
荣 海,张宏伟,陈建强,等. 基于多因素模式识别的急倾斜特厚煤层冲击地压危险性预测[J]. 采矿与安全工程学报,2018,35(1):125−132. doi: 10.13545/j.cnki.jmse.2018.01.018
RONG Hai,ZHANG Hongwei,CHEN Jianqiang,et al. Rockburst-risk prediction in steep-inclined and extremely thick coal seams based on the multi-factor pattern recognition method[J]. Journal of Mining & Safety Engineering,2018,35(1):125−132. doi: 10.13545/j.cnki.jmse.2018.01.018
|
| [18] |
HE S,SONG D,LI Z,et al. Precursor of spatio-temporal evolution law of MS and AE activities for rock burst warning in steeply inclined and extremely thick coal seams under caving mining conditions[J]. Rock Mechanics and Rock Engineering,2019,52(7):2415−2435. doi: 10.1007/s00603-018-1690-z
|
| [19] |
王正义. 急倾斜特厚煤层水平分段开采夹持型冲击失稳机理研究[D]. 徐州: 中国矿业大学, 2019.
WANG Zhengyi. Mechanism of clamping rockburst in horizontal section mining of steeply inclined, extra-thick coalseam[D]. Xuzhou: China University of Mining and Technology, 2019.
|
| [20] |
曹民远,陈建强,闫瑞兵,等. 基于数据分析的近直立煤层冲击地压致灾因素研究[J]. 煤炭科学技术,2019,47(12):32−37. doi: 10.13199/j.cnki.cst.2019.12.005
CAO Minyuan,CHEN Jianqiang,YAN Ruibing,et al. Study on factors affecting rock burst of sub-erect coal seam based on data analysis[J]. Coal Science and Technology,2019,47(12):32−37. doi: 10.13199/j.cnki.cst.2019.12.005
|
| [21] |
何学秋,陈建强,宋大钊,等. 典型近直立煤层群冲击地压机理及监测预警研究[J]. 煤炭科学技术,2021,49(6):13−22. doi: 10.13199/j.cnki.cst.2021.06.002
HE Xueqiu,CHEN Jianqiang,SONG Dazhao,et al. Study on mechanism of rock burst and early warning of typical steeply inclined coal seams[J]. Coal Science and Technology,2021,49(6):13−22. doi: 10.13199/j.cnki.cst.2021.06.002
|
| [22] |
许振浩,李术才,李利平,等. 基于层次分析法的岩溶隧道突水突泥风险评估[J]. 岩土力学,2011,32(6):1757−1766. doi: 10.3969/j.issn.1000-7598.2011.06.027
XU Zhenhao,LI Shucai,LI Liping,et al. Risk assessment of water or mud inrush of karst tunnels based on analytic hierarchy process[J]. Rock and Soil Mechanics,2011,32(6):1757−1766. doi: 10.3969/j.issn.1000-7598.2011.06.027
|
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