Research on optimal design of stop line position in working face with rock burst hazard under condition of isolated coal pillar

WEN Yingyuan; XUE Chengchun; CAO Anye; NIU Fengwei; GUO Wenhao; SHEN Zhiping

Safety in Coal Mines > 2021 > 52(9): 190-195,203.

WEN Yingyuan, XUE Chengchun, CAO Anye, NIU Fengwei, GUO Wenhao, SHEN Zhiping. Research on optimal design of stop line position in working face with rock burst hazard under condition of isolated coal pillar[J]. Safety in Coal Mines, 2021, 52(9): 190-195,203.

Citation:

PDF (3861 KB)

Research on optimal design of stop line position in working face with rock burst hazard under condition of isolated coal pillar

More Information

Published Date: September 19, 2021

Graphical Abstract

Abstract

Abstract

Aiming at the condition of the downhill islanding protection coal pillar in Yaoqiao Coal Mine, the total micro-seismic energy and the frequency continue to rise at the end of the mining face, and the on-site rock burst risk increases. Based on theoretical analysis and numerical simulation, the stress distribution pattern of the coal pillar area in the island and the characteristics of the stress distribution in the coal pillar area before and after the mining of the working face were analyzed. According to the working face mining conditions, the stop line position of working face was optimized. The study shows that the stress distribution characteristics of isolated coal pillar before the mining of the working face are saddle shape. When the mining scale of the working face is greater than 920 m, the supporting stress curve of the coal pillar area gradually changes from saddle shape to a single-peak pattern, and the stress concentration coefficient of the coal pillar area increases from 2.20 to 2.56. Field practice shows that the actual mining scale of the working face is 900 m, which is 30 m ahead of the original design stopping line. The width of the protective coal pillar in the working face section increases from 175 m to 205 m, and the stress in the coal pillar area is saddle-shaped. It effectively ensures the safety of the working face, reduces the stress concentration in the protective coal pillar area of the mining area, and creates favorable conditions for the subsequent mining of the working face.
- stress distribution,
- isolated coal pillar,
- stop line design,
- rock burst,
- numerical simulation

FullText(HTML)

References (20)

References

[1]	朱斯陶，姜福兴，刘金海，等．我国煤矿整体失稳型冲击地压类型、发生机理及防治[J]．煤炭学报，2020，45（11）：3667－3677. ZHU Sitao, JIANG Fuxing, LIU Jinhai, et al. Types, occurcenec mechanism and prevention of overall instability induced rockbursts in China coal mines[J]. Journal of China Coal Society, 2020, 45（11）: 3667-3677.
[2]	谢和平．深部岩体力学与开采理论研究进展[J]．煤炭学报，2019，44（5）：1283－1305. XIE Heping. Research review of the state key research development program of China: deep rock mechanics and mining theory[J]. Journal of China Coal Society, 2019, 44（5）: 1283-1305.
[3]	朱广安．深地超应力作用效应及孤岛工作面整体冲击失稳机理研究[D]．徐州：中国矿业大学，2017.
[4]	齐庆新，李一哲，赵善坤，等．我国煤矿冲击地压发展70年：理论与技术体系的建立与思考[J]．煤炭科学技术，2019，47（9）：1－40. QI Qingxin, LI Yizhe, ZHAO Shankun, et al. Seventy years development of coal mine rockburst in China: establishment and consideration of theory and technology system[J]. Coal Science and Technology, 2019, 47（9）: 1-40.
[5]	窦林名，冯龙飞，蔡武，等．煤岩灾变破坏过程的声震前兆识别与综合预警模型研究[J]．采矿与安全工程学报，2020，37（5）：960－968. DOU Linming, FENG Longfei, CAI Wu, et al. Seismo-acoustic precursor identification and comprehensive war-ning model for the catastrophic failure process of coal and rock[J]. Journal of Mining & Safety Engineering, 2020, 37（5）: 960-968.
[6]	齐庆新，赵善坤，李海涛，等．我国煤矿冲击地压防治的几个关键问题[J]．煤矿安全，2020，51（10）：135. QI Qingxin, ZHAO Shankun, LI Haitao, et al. Several key problems of coal bump prevention and control in China’s coal mines[J]. Safety in Coal Mines, 2020, 51（10）: 135.
[7]	潘俊锋，齐庆新，刘少虹，等．我国煤炭深部开采冲击地压特征、类型及分源防控技术[J]．煤炭学报，2020， 45（1）：111－121. PAN Junfeng, QI Qingxin, LIU Shaohong, et al. Characteristics, types and prevention and control technology of rock burst in deep coal mining in China[J]. Journal of China Coal Society, 2020, 45（1）:111-121.
[8]	王高昂，朱斯陶，姜福兴，等．千米深井大巷孤立煤体整体失稳冲击机理及防治研究[J]．采矿与安全工程学报，2019，36（5）：968－976. WANG Gao’ang, ZHU Sitao, JIANG Fuxing, et al. Mechanism of rock burst induced by overall instabilityof isolated coal and its prevention in large well at thousands-kilometer underground[J]. Journal of Mining & Safety Engineering, 2019, 36（5）: 968-976.
[9]	朱广安，窦林名，丁自伟，等．孤岛工作面采前冲击危险性预评估研究[J]．岩土工程学报，2018，40（05）：819－827. ZHU Guang’an, DOU Linming, DING Ziwei, et al. Pre-evaluation for rock burst risks in island longwall panel before mining[J]. Chinese Journal of Geotechnical Engineering, 2018, 40（5）: 819-827.
[10]	刘长友，黄炳香，孟祥军，等．超长孤岛综放工作面支承压力分布规律研究[J]．岩石力学与工程学报，2007（Ｓ1）：2761－2766. LIU Changyou, HUANG Bingxiang, MENG Xiangjun, et al. Research on abutment pressure distribution law ofoverlength isolated fully-mechanized top coal cavingface[J]. Chinese Journal of Rock Mechanics and Engineering, 2007（S1）: 2761-2766.
[11]	韩亮，辛崇伟，梁开山，等．厚硬岩层控制下不规则断层煤柱冲击危险性研究[J]．煤炭工程，2018，50（9）：79－82. HAN Liang, XIN Chongwei, LIANG Kaishan et al. Burst hazard analysis of irregular fault coal pillarcontrolled by thick hard rock stratum[J]. Coal Engineering, 2018, 50（9）: 79-82.
[12]	孙庆先．基于形状指数和面积的不规则煤柱稳定性分析[J]．煤矿安全，2017，48（12）：176－178. SUN Qingxian. Stability analysis of irregular coal pillars based on its shape index and area[J]. Safety in Coal Mines, 2017, 48（12）: 176-178.
[13]	李国君．抚顺矿区冲击地压综合防治技术[J]．煤矿安全，2020，51（10）：144－151. LI Guojun. Comprehensive prevention and control technology of rock burst in fushun mining area[J]. Safety in Coal Mines, 2020, 51（10）: 144-151.
[14]	王志强，王鹏，石磊，等．基于沿空巷道围岩应力分析的防冲机理研究[J]．中国矿业大学学报，2020，49（6）：1046－1056. WANG Zhiqiang, WANG Peng, SHI Lei, et al. Research on prevention of rock burst based on stress analysis of surrounding rock of gob-side entry[J]. Journal of China University of Mining & Technology, 2020, 49（6）: 1046-1056.
[15]	谭云亮，郭伟耀，辛恒奇，等．煤矿深部开采冲击地压监测解危关键技术研究[J]．煤炭学报，2019，44（1）：160－172. TAN Yunliang, GUO Weiyao, XIN Hengqi, et al. Key technology of rock burst monitoring and control in deep coal mining[J]． Journal of China Coal Society, 2019, 44（1）: 160-172.
[16]	周辉，渠成堃，黄健利，等．基于模型试验的深部煤层合理停采线结构分析[J]．岩石力学与工程学报，2017，36（10）：2373. ZHOU Hui, QU Chengkun, HUANG Jianli, et al. Analysis of rational shape of stop line in deep coal seambased on model test[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36（10）: 2373.
[17]	崔树江．塔山矿综放工作面停采线合理煤柱宽度实测[J]．煤矿安全，2015，46（3）：190－193. CUI Shujiang. Actual measurement for reasonable coal pillar width of fully mechanized caving face stopping line of tashan coal mine[J]. Safety in Coal Mines, 2015, 46（3）: 190-193.
[18]	陈科，柏建彪，胡忠超，等．超前支承压力对下山的影响分析及合理停采线位置确定[J]．煤矿开采，2010， 15（1）：35-37. CHEN Ke, BAI Jianbiao, HU Zhongchao, et al. Analysis of influence of advance abutment pressure on dip and rational end-mining line selection[J]. Coal Mining Technology, 2010, 15（1）: 35-37.
[19]	窦林名，姜耀东，曹安业，等．煤矿冲击矿压动静载的“应力场-震动波场”监测预警技术[J]．岩石力学与工程学报，2017，36（4）：803－811. DOU Linming, JIANG Yaodong, CAO Anye, et al. Monitoring and pre-warning of rockburst hazard with technology of stress fieldand wave field in underground coalmines[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36（4）: 803-811.
[20]	李鹏．残煤长壁工作面前方煤柱稳定性研究[D]．太原：太原理工大学，2013．

[1]	WANG Kun. Nitrogen Injection and Fire Prevention Technology for Short Arm High Mining Height Fully Mechanized Caving Face[J]. Safety in Coal Mines, 2020, 51(3): 137-143.
[2]	LIU Yuliang, PENG Baoshan, MENG Wenjun, LIU Liren, WANG Weidong. Goaf Nitrogen Injection Fire-fighting Technology of Shallow Buried Depth Coal Seam[J]. Safety in Coal Mines, 2017, 48(5): 73-76.
[3]	ZHANG Depeng, DUAN Xikai. Spontaneous Combustion Preventing and Control Technology for Underhand Stoping Working Face Goaf of Geting Coal Mine[J]. Safety in Coal Mines, 2017, 48(3): 79-81.
[4]	DONG Jun, YU Guisheng, WANG Jinbao. Simulating Optimization of Process Parameters for Fire Prevention by Continuous Nitrogen Injection in Goaf of Fully Mechanized Caving Face[J]. Safety in Coal Mines, 2016, 47(7): 186-189.
[5]	QIAN Jun, ZHOU Guanghua, LIU Honggang, MA Lingjun, WU Shuquan, QIN Lei. Application of Surface Drilling Liquid Nitrogen Immediate Injection Fire Preventing and Extinguishing Technique in Lingxin Coal Mine[J]. Safety in Coal Mines, 2015, 46(9): 137-140.
[6]	ZHAO Hongyue. Comprehensive Fire Preventing and Extinguishing Technology for Gob at Fully Mechanized Mining Face in Ciyaogou Coal Mine[J]. Safety in Coal Mines, 2015, 46(6): 63-65.
[7]	LUO Libo. Application of Nitrogen Injection Technology by Open Bypass in Haoda Coal Mine Fire Prevention[J]. Safety in Coal Mines, 2014, 45(3): 129-132.
[8]	XU Yong-liang, WANG Lan-yun, CHU Ting-xiang, YU Ming-gao. The Effect of Nitrogen Injection on Gas Distribution in the Loose Coal of Goaf[J]. Safety in Coal Mines, 2013, 44(5): 22-25.
[9]	ZHU Hong-qing, LI Feng, ZHANG Yue, WANG Wen-hai, FENG Shi-liang. Design and Inert Effect Analysis of Non-interval Nitrogen Injection for Fire Control[J]. Safety in Coal Mines, 2013, 44(2): 175-178.
[10]	SUN Bing-cheng. Technique of Pre-fire Prevention and Extinguishing by Nitrogen Injection in Fully Mechanized Caving Face of Extremely Steep and Thick Coal Seam[J]. Safety in Coal Mines, 2012, 43(S1): 62-64,65.

Cited By

Get Citation

PDF

XML

Article views (20) PDF downloads (10)

Turn off MathJax

Article Contents

Abstract

References

Research on optimal design of stop line position in working face with rock burst hazard under condition of isolated coal pillar

Abstract

References

Related Articles

Catalog

Research on optimal design of stop line position in working face with rock burst hazard under condition of isolated coal pillar

Abstract

References

Related Articles

Catalog

Export File

Citation

Format

Content