| Citation: |
WANG Chaojie，TANG Zexiang，XU Changhang，et al. Dynamic response mechanism of initial failure of coal mass induced by in-situ stress in an outburst inoculation process of the working face for coal mining[J]. Coal Science and Technology，2023，51（10）：140−154. DOI: 10.13199/j.cnki.cst.2022-1713
|
There is still a great challenge to reveal the micro-macro dynamic mechanical behavior of initial coal failure induced by mining stress field in working face as a necessary condition for the outburst occurrence. The multivariate stress loading paths for the damage and instability of mining coal were constructed based on the typical coal and gas outburst accident of mining face. PFC3D discrete software was used to carry out the visual simulation of damage and instability of coal under multiple working conditions and scales. The dynamic response law of damage and instability of mining coal was revealed, the dynamic evolution behavior of cracks in mining coal was clarified, and the prospect of outburst prevention technologies was put forward based on the initial failure process of coal induced by in-situ stress under mining. The results shown that the failure type and strength of the mined coal varied significantly with the loading and unloading rate of the principal stress. In the process of gradual unloading of stress, the macroscopic fracture surface of coal presented the form of single inclined plane or conjugate shear plane, and the failure strength of coal decreased with the increase of unloading rate. With the gradual loading in both directions of stress at the same rate, unidirectional sudden unloading or a certain residual stress maintaining state presented a macro fracture surface parallel to the direction of the intermediate principal stress. And the failure strength of coal decreased with the increase of the unloading degree or the decrease of the residual stress. Under different stress loaded, the tension-shear failure process of coal appeared successively with shear and tension cracks. In the process of instability caused by mining coal damage, the dynamic evolution of cracks presented intermittent, progressive and paroxysmal composite characteristics. The overall development process of cracks can be characterized as the initial appearance of new cracks (intermittent-sudden increase stage), crack expansion (gradual-slow increase stage), penetration and expansion (paroxysmal-slow increase stage), and the overall tearing process of coal (sudden increase stage). The mechanical strength of coal was regarded as one of the main controlling factors affecting the occurrence of outbursts. The difficulty of initial failure of coal induced by in-situ stress depended critically on the stress loading and unloading path. The coal was most prone to initial failure when the unidirectional principal stress was suddenly unloaded or the bidirectional principal stress was gradually unloaded. Based on this mechanical law, the “ideal mining mode of outburst prediction in mining working face” was proposed to represent the most dangerous state of coal in the working face.
| [1] |
袁 亮. 煤矿典型动力灾害风险判识及监控预警技术研究进展[J]. 煤炭学报,2020,45(5):1557−1566.
YUAN Liang. Research progress of risk identification, assessment, monitoring and early warning technologies of typical dynamic hazards in coal mine[J]. Journal of China Coal Society,2020,45(5):1557−1566.
|
| [2] |
齐庆新,潘一山,李海涛,等. 煤矿深部开采煤岩动力灾害防控理论基础与关键技术[J]. 煤炭学报,2020,45(5):1567−1584.
QIN Qingxin,PAN Yishan,LI Haitao,et al. Theoretical basis and key technology of prevention and control of coal-rock dynamic disasters in deep coal mining[J]. Journal of China Coal Society,2020,45(5):1567−1584.
|
| [3] |
谢广祥,胡祖祥,王 磊. 工作面煤层瓦斯压力与采动应力的耦合效应[J]. 煤炭学报,2014,39(6):1089−1093.
XIE Guangxiang,HU Zuxiang,WANG Lei. The coupling effect of the coal seam gas pressure and mining stress in working face[J]. Journal of China Coal Society,2014,39(6):1089−1093.
|
| [4] |
胡祖祥,谢广祥. 煤层瓦斯压力受控于采动应力的“异步-同步”特征研究[J]. 采矿与安全工程学报,2015,32(6):1037−1042.
HU Zuxiang,XIE Guangxiang. A research of asynchronous and synchronous characteristics of coal seam gas pressure controlled by the mining-induced stress[J]. Journal of Mining & Safety Engineering,2015,32(6):1037−1042.
|
| [5] |
尹光志,李 星,鲁 俊,等. 深部开采动静载荷作用下复合动力灾害致灾机理研究[J]. 煤炭学报,2017,42(9):2316−2326.
YIN Guangzhi,LI Xing,LU Jun,et al. Disaster-causing mechanism of compound dynamic disaster in deep mining under static and dynamic load conditions[J]. Journal of China Coal Society,2017,42(9):2316−2326.
|
| [6] |
周宏伟,荣腾龙,牟瑞勇,等. 采动应力下煤体渗透率模型构建及研究进展[J]. 煤炭学报,2019,44(1):221−235.
ZHOU Hongwei,RONG Tenglong,MOU Ruiyong,et al. Development in modeling approaches to mining-induced permeability of coals[J]. Journal of China Coal Society,2019,44(1):221−235.
|
| [7] |
王 刚,刘志远,王鹏飞,等. 考虑瓦斯吸附作用的真三轴煤体剪切渗流特性试验研究[J]. 采矿与安全工程学报,2019,36(5):1061−1070.
WANG Gang,LIU Zhiyuan,WANG Pengfei,et al. Experimental study on shear seepage characteristics of true triaxial coal body under the consideration of gas adsorption[J]. Journal of Mining & Safety Engineering,2019,36(5):1061−1070.
|
| [8] |
舒龙勇,朱南南,陈 结,等. 煤与瓦斯突出危险精准辨识理论方法与技术探索[J]. 煤炭学报,2020,45(5):1614−1625.
SHU Longyong,ZHU Nannan,CHEN Jie,et al. Theoretical method and technology of precision identification for coal and gas outburst hazard[J]. Journal of China Coal Society,2020,45(5):1614−1625.
|
| [9] |
曹代勇,占文锋,李焕同,等. 中国煤矿动力地质灾害的构造背景与风险区带划分[J]. 煤炭学报,2020,45(7):2376−2388.
CAO Daiyong,ZHAN Wenfeng,LI Huantong,et al. Tectonic setting and risk zoning of dynamic geological disasters in coal mines in China[J]. Journal of China Coal Society,2020,45(7):2376−2388.
|
| [10] |
袁 亮,姜耀东,何学秋,等. 煤矿典型动力灾害风险精准判识及监控预警关键技术研究进展[J]. 煤炭学报,2018,43(2):306−318.
YUAN Liang,JIANG Yaodong,HE Xueqiu,et al. Research progress of precise risk accurate identification and monitoring early warning on typical dynamic disasters in coal mine[J]. Journal of China Coal Society,2018,43(2):306−318.
|
| [11] |
程远平,雷 杨. 构造煤和煤与瓦斯突出关系的研究[J]. 煤炭学报,2021,46(1):180−198.
CHEN Yuanping,LEI Yang. Causality between tectonic coal and coal and gas outbursts[J]. Journal of China Coal Society,2021,46(1):180−198.
|
| [12] |
刘 峰,曹文君,张建明,等. 我国煤炭工业科技创新进展及“十四五”发展方向[J]. 煤炭学报,2021,46(1):1−15.
LIU Feng,CAO Wenjun,ZHANG Jianming,et al. Current technological innovation and development direction of the 14th Five-Year Plan period in China coal industry[J]. Journal of China Coal Society,2021,46(1):1−15.
|
| [13] |
尹光志,刘玉冰,李铭辉,等. 真三轴加卸载应力路径对原煤力学特性及渗透率影响[J]. 煤炭学报,2018,43(1):131−136.
YIN Guangzhi,LIU Yubing,LI Minghui,et al. Influence of true triaxial loading-unloading stress paths on mechanical property and permeability of coal[J]. Journal of China Coal Society,2018,43(1):131−136.
|
| [14] |
鲁 俊,尹光志,高 恒,等. 真三轴加载条件下含瓦斯煤体复合动力灾害及钻孔卸压试验研究[J]. 煤炭学报,2020,45(5):1812−1823.
LU Jun,YIN Guangzhi,GAO Heng,et al. Experimental study on compound dynamic disaster and drilling pressure relief of gas-bearing coal under true triaxial loading[J]. Journal of China Coal Society,2020,45(5):1812−1823.
|
| [15] |
赵延林,曹 平,万 文,等. 随机卸荷岩体裂纹流变断裂模型与数值模拟[J]. 中南大学学报(自然科学版),2015,46(12):4647−4656.
ZHAO Yanlin,CAO Ping,WAN Wen,et al. Model and numerical simulation of rheological fracture of random unloading rock mass cracks[J]. Journal of Central South University (Science and Technology),2015,46(12):4647−4656.
|
| [16] |
左建平,陈 岩. 卸载条件下煤岩组合体的裂纹张开效应研究[J]. 煤炭学报,2017,42(12):3142−3148.
ZUO Jianping,CHEN Yan. Investigation on crack recovery effect of coal-rock combined body under the influence of unloading[J]. Journal of China Coal Society,2017,42(12):3142−3148.
|
| [17] |
WANG Chaojie,YANG Shengqiang,LI Xiaowei,et al. Study on the failure characteristics of concrete specimen under confining pressure[J]. Arabian Journal for Science and Engineering,2019,44(5):4119−4129. doi: 10.1007/s13369-018-3335-7
|
| [18] |
许 江,杨孝波,周 斌,等. 突出过程中煤层瓦斯压力与温度演化规律研究[J]. 中国矿业大学学报,2019,48(6):1177−1187. doi: 10.13247/j.cnki.jcumt.001073
XU Jiang,YANG Xiaobo,ZHOU Bin,et al. Study of evolution law of gas pressure and temperature in coal seam during outburst[J]. Journal of China University of Mining & Technology,2019,48(6):1177−1187. doi: 10.13247/j.cnki.jcumt.001073
|
| [19] |
刘恺德. 高应力下含瓦斯原煤三轴压缩力学特性研究[J]. 岩石力学与工程学报,2017,36(2):380−393.
LIU Kaide. Mechanical properties of raw coal containing gas under high triaxal stress compression[J]. Chinese Journal of Rock Mechanics and Engineering,2017,36(2):380−393.
|
| [20] |
李清川,王汉鹏,袁 亮,等. 吸附气体量对煤岩力学特性损伤劣化的试验研究[J]. 中国矿业大学学报,2019,48(5):955−965.
LI Qingchun,WANG Hanpeng,YUAN Liang,et al. Experimental study of damage and degradation of coal by adsorbed gas amount[J]. Journal of China University of Mining & Technology,2019,48(5):955−965.
|
| [21] |
张遵国,齐庆杰,曹树刚,等. 煤层吸附He, CH4和CO2过程中的变形特性[J]. 煤炭学报,2018,43(9):2484−2490.
ZHANG Zuiguo,QI Qingjie,CAO Shuguang,et al. Characteristics of coal deformation during its adsorption of He, CH4 and CO2[J]. Journal of China Coal Society,2018,43(9):2484−2490.
|
| [22] |
刘力源,朱万成,魏晨慧,等. 气体吸附诱发煤强度劣化的力学模型与数值分析[J]. 岩土力学,2018,39(4):1500−1508.
LIU Liyuan,ZHU Wancheng,WEI Chenhui,et al. Mechanical model and numerical analysis of mechanical property alterations of coal induced by gas adsorption[J]. Rock and Soil Mechanics,2018,39(4):1500−1508.
|
| [23] |
杨 威.煤层采场力学行为演化特征及瓦斯治理技术研究[D].徐州:中国矿业大学, 2013:10–36.
YANG Wei. Mechanical behavior evolution of mining stope and gas control Technology[D]. Xuzhou: China University of Mining and Technology, 2013:10–36.
|
| [24] |
余大洋,唐一博,王俊峰,等. 用于煤与瓦斯突出模拟的型煤胶结材料配比实验研究[J]. 煤矿安全,2016,47(4):11−14,19. doi: 10.13347/j.cnki.mkaq.2016.04.003
YU Dayang,TANG Yibo,WANG Junfeng,et al. Experimental study on cementing materials ratio of briquette coal using in coal and gas simulation[J]. Safety in coal mines,2016,47(4):11−14,19. doi: 10.13347/j.cnki.mkaq.2016.04.003
|
| [25] |
高 魁,乔国栋,刘泽功,等. 煤与瓦斯突出机理分类研究构想及其应用探讨[J]. 采矿与安全工程学报,2019,36(5):1043−1051. doi: 10.13545/j.cnki.jmse.2019.05.023
GAO Kui,QIAO Guoliang,LIU Zegong,et al. On classification conception of coal and gas outburst mechanism and its application[J]. Journal of Mining & Safety Engineering,2019,36(5):1043−1051. doi: 10.13545/j.cnki.jmse.2019.05.023
|
| [26] |
崔鸿伟. 煤巷掘进工作面突出预测指标及其临界值研究[J]. 煤炭学报,2011,36(5):808−811.
CUI Hongwei. Research on the prediction indexes of coal roadway heading face outburst and its critical value[J]. Journal of China Coal Society,2011,36(5):808−811.
|
| [27] |
杨丁丁. 煤巷突出危险性预测方法研究[D]. 徐州: 中国矿业大学, 2018: 4–30.
YANG DingDing. Study on the prediction methods of outburst danger on coal roadway[D]. Xuzhou: China University of Mining and Technology, 2018:4–30.
|
| [28] |
王超杰. 煤巷工作面突出危险性预测模型构建及辨识体系研究[D]. 徐州: 中国矿业大学, 2019: 16–42.
WANG Chaojie. Study on establishment of prediction model and identification system for outburst risk of coal roadway working face[D].Xuzhou: China University of Mining and Technology, 2019: 16–42.
|
| [1] | BAO Xiankai, QIAO Jianlong, CUI Guangqin, WANG Lingyu, TIAN Baolong, WANG Lizhi. Damage and crack propagation evolution of coal rock under combined voltage discharge in water[J]. COAL SCIENCE AND TECHNOLOGY, 2025, 53(3): 248-263. DOI: 10.12438/cst.2024-1406 |
| [2] | ZHANG Xin, LIU Zegong, ZHANG Jianyu, FU Shigui, QIAO Guodong, YANG Shuai, CHANG Shuai. Study on propagation law of cracking and permeability enhancement caused by blasting in deep high-gas coal seams[J]. COAL SCIENCE AND TECHNOLOGY, 2024, 52(7): 89-100. DOI: 10.12438/cst.2023-1622 |
| [3] | YANG Shuai, LIU Zegong, ZHANG Jianyu, FU Shigui, QIAO Guodong, ZHANG Xin. Experimental study on the effect of the angle of the shaped charge tube on the penetration enhancement of coal seam blasting[J]. COAL SCIENCE AND TECHNOLOGY, 2024, 52(3): 129-138. DOI: 10.12438/cst.2023-0714 |
| [4] | WANG Kaifei, ZHANG Changsuo, HAO Bingyuan, ZHANG Shengli. Study on initiation and propagation mechanism of internal cracks caused by dynamic and static action of shaped charge blasting under in-situ stress[J]. COAL SCIENCE AND TECHNOLOGY, 2023, 51(S1): 50-64. DOI: 10.13199/j.cnki.cst.2022-1042 |
| [5] | ZHAO Pengxiang, LIU Lidong, LI Shugang, XU Peiyun, LI Gang, WEI Zongyong, JIA Yongyong. Dip angle effect of coal seam on crack propagation rule of compacted area at fully-mechanized rise mining face[J]. COAL SCIENCE AND TECHNOLOGY, 2021, 49(11): 65-72. |
| [6] | WANG Lei, LIANG Weiguo. Experimental study on crack propagation of coal-rock mass under supercritical CO2 fracturing[J]. COAL SCIENCE AND TECHNOLOGY, 2019, (2). |
| [7] | SHEN Chunming, LIN Baiquan, LIU Ting, WANG Weihua, YANG Xin. Analysis on particle flow of crack propagation in slotting coal and rock sample[J]. COAL SCIENCE AND TECHNOLOGY, 2018, (7). |
| [8] | XU Xiaoyun, ZHANG Mingming. Study on T stress affected to crack fracturing and extension mechanism ofhalf disc rock specimen[J]. COAL SCIENCE AND TECHNOLOGY, 2018, (3). |
| [9] | Wang Guoyan Yu Guangming Gao Liyan Li Gang, . Study on influence of initial crack dip angle on damage-fractured characteristics of rock[J]. COAL SCIENCE AND TECHNOLOGY, 2017, (6). |
| 1. |
王海宾，王云搏，刘思旭，戚盛名，谢方鹏，李百宜. 亭南煤矿巨厚砂岩含水层顶板灾害协同防控技术及应用. 矿业科学学报. 2024(05): 747-758 .
| |
| 2. |
王超杰，李晓伟. 煤与瓦斯突出的扩容突变机理. 煤炭学报. 2024(S2): 1007-1024 .
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: