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ZHANG Fenggang. Stress distribution law of steeply inclined horizontal sectional caving coal mining and prevention and control of rock burst[J]. Safety in Coal Mines, 2023, 54(7): 101-108.
Citation: ZHANG Fenggang. Stress distribution law of steeply inclined horizontal sectional caving coal mining and prevention and control of rock burst[J]. Safety in Coal Mines, 2023, 54(7): 101-108.

Stress distribution law of steeply inclined horizontal sectional caving coal mining and prevention and control of rock burst

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  • Available Online: August 30, 2023
  • In order to reveal the distribution characteristics of the stress field and rock burst mechanism induced in the horizontal segmented working face of steeply inclined coal seams, taking eastern No.1 mining area of Wangjiashan Coal Mine as an engineering background, the characteristics of rock burst behavior in the horizontal segmented working face were theoretically analyzed, and the evolution law of the stress field during the horizontal segmented mining process of steeply inclined coal seams was analyzed by numerical simulation; the mechanism of micro-seismicity inducing rock burst of roadway coal floor during horizontal sublevel mining in steeply inclined coal seams is revealed. The research results show that the rock burst risk of roof roadway is significantly higher than that of floor roadway. With the increase of working face segmentation, the vertical stress significantly increases, and the vertical stress concentration degree of roof roadway is higher than that of floor roadway. The maximum principal stress changes from the original horizontal distribution to the distribution along the vertical coal seam direction. After mining, the horizontal stress field of the coal at the working face tends to increase first and then decrease, and the horizontal stress on the roof side is significantly higher than that on the floor side. The peak value of the horizontal stress is linearly related to the mining depth. The prevention and control methods for rock burst in horizontal sublevel mining are proposed. The prevention effect is remarkable.
  • [1] 国家统计局.中华人民共和国2022年国民经济和社会发展统计公报[N].中国信息报,2023-03-01(1). [2] 窦林名,周坤友,宋士康,等.煤矿冲击矿压机理、监测预警及防控技术研究[J].工程地质学报,2021,29(4):917-932. DOU Linming, ZHOU Kunyou, SONG Shikang, et al. Occurrence mechanism, monitoring and prevention technology of rockburst in coal mines[J]. Journal of Engineering Geology, 2021, 29(4): 917-932. [3] 缪协兴,钱鸣高.中国煤炭资源绿色开采研究现状与展望[J].采矿与安全工程学报,2009,26(1):1-14. MIAO Xiexing, QIAN Minggao. Research on green mining of coal resources in China:current status and future prospects[J]. Journal of Mining & Safety Engineering, 2009, 26(1): 1-14. [4] 蔡武.断层型冲击矿压的动静载叠加诱发原理及其监测预警研究[D].徐州:中国矿业大学,2015. [5] 何江.煤矿采动动载对煤岩体的作用及诱冲机理研究[D].徐州,中国矿业大学,2013. [6] 伍永平,刘孔智,贠东风,等.大倾角煤层安全高效开采技术研究进展[J].煤炭学报,2014,39(8):1611-1618. WU Yongping, LIU Kongzhi, YUN Dongfeng, et al. Research progress on the safe and efficient mining technology of steeply dipping seam[J]. Journal of China Coal Society, 2014, 39(8): 1611-1618. [7] 李安宁,窦林名,王正义,等.动载诱发近直立煤层水平分段开采冲击矿压的数值模拟研究[J].煤炭工程,2018,50(9):83-87. LI Anning, DOU Linming, WANG Zhengyi, et al. Numerical simulation of rock burst of horizontal sectional mining of near-vertical coal seam under dynamic load[J]. Coal Engineering, 2018, 50(9): 83-87. [8] 来兴平,代晶晶,李超.急倾斜煤层开采覆岩联动致灾特征分析[J].煤炭学报,2020,45(1):122-130. LAI Xingping, DAI Jingjing, LI Chao. Analysis on hazard characteristics of overburden structure in steeply inclined coal seam[J]. Journal of China Coal Society, 2020, 45(1): 122-130. [9] 王正义,窦林名,何江,等.急倾斜特厚煤层水平分段开采冲击机理及防治[J].煤矿安全,2021,52(7):207-214. WANG Zhengyi, DOU Linming, HE Jiang, et al. Mechanism and prevention of rock burst induced by horizontal sublevel mining of a steeply inclined extra-thick coal seam[J]. Safety in Coal Mines, 2021, 52(7): 207-214. [10] 何江,窦林名,曹晋荣,等.急倾斜特厚煤层水平分段综放开采冲击矿压机理[J].煤炭学报,2020,45(5):1701-1709. HE Jiang, DOU Linming, CAO Jinrong, et al. Mechanism of rock burst in steep and extremely thick coal seam using horizontal section top-coal caving[J]. Journal of China Coal Society, 2020, 45(5): 1701-1709. [11] 王崧玮,曹安业,王华,等.急倾斜特厚煤层“错动-夹持”型冲击矿压机理[J].采矿与安全工程学报,2022,39(4):711-719. WANG Songwei, CAO Anye, WANG Hua, et al. Mechanism of “dislocation-clamping” rock burst in steeply inclined and extra thick coal seam[J]. Journal of Mining & Safety Engineering, 2022, 39(4): 711-719. [12] 李安宁,窦林名,王正义,等.近直立煤层水平分段开采夹持煤体型冲击机理及防治[J].煤炭学报,2018, 43(12):3302-3308. LI Anning, DOU Linming, WANG Zhengyi, et al. Rockburst mechanism and prevention of clamping coal in mining near-vertical coal seam with horizontal slice method[J]. Journal of China Coal Society, 2018, 43(12): 3302-3308. [13] 蓝航.近直立特厚两煤层同采冲击矿压机理及防治[J].煤炭学报,2014,39(S2):308-315. LAN Hang. Rock-burst mechanism and prevention in mining sub-erect and extremely-thick coal seam with horizontal slicing method[J]. Journal of China Coal Society, 2014, 39(S2): 308-315. [14] 吴振华,潘鹏志,赵善坤,等.近直立特厚煤层组“顶板-岩柱”诱冲机理及防控实践[J].煤炭学报,2021,46(S1):49-62. WU Zhenhua, PAN Pengzhi, ZHAO Shankun, et al. Mechanism of rock bursts caused by “Roof-Rock pillar” in mining steeply-inclined and its prevention and treatment[J]. Journal of China Coal Society, 2021, 46(S1): 49-62. [15] 鞠文君,郑建伟,魏东,等.急倾斜特厚煤层多分层同采巷道冲击矿压成因及控制技术研究[J].采矿与安全工程学报,2019,36(2):280-289. JU Wenjun, ZHENG Jianwei, WEI Dong, et al. Study on the causes and control technology about the coal bump in multi-layered mining roadway in steep-thick coal seams[J]. Journal of Mining & Safety Engineering, 2019, 36(2): 280-289. [16] 杜涛涛,李康,蓝航,等.近直立特厚煤层冲击矿压致灾过程分析[J].采矿与安全工程学报,2018,35(1):140-145.

    DU Taotao, LI Kang, LAN Hang, et al. Rockburst process analysis in steeply-inclined extremely-thick coal seam[J]. Journal of Mining & Safety Engineering, 2018, 35(1): 140-145.

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