|
|
|
| Impact tendency test and risk assessment analysis of No.3 coal seam in Changping Coal Industry |
| Xiao Yutong1, Zhang Guobin2,3, Li Jianxin3 |
1. Beijing Huayu Engineering Co., Ltd., China Coal Technology and Engineering Group, Beijing 045000, China;
2. Department of Earth Science and Engineering, Shanxi Institute of Technology, Yangquan 045000, China;
3. College of Mining, Liaoning Technical University, Fuxin 123000, China |
|
|
|
|
Abstract Rock burst accidents in coal mines frequently occurred in high in-situ stress areas of hard and brittle coal-rock masses and coal seams with a burial depth exceeding 400 m. With severe hazards, such accidents were caused, bringing huge economic losses and casualties to coal mines. The mining depth of No. 3 coal seam in Changping Coal Industry was more than 400 m, which met the critical mining depth standard for rock burst-prone coal mines in China. To prevent the occurrence of rock burst accidents in No. 3 coal seam, rock burst tendency tests and risk assessment analyses were carried out in this study. The test results were presented as follows: the average values of dynamic failure time, elastic energy index, burst energy index and uniaxial compressive strength of No. 3 coal seam in Changping Coal Industry were determined to be 2 312 ms, 3.06, 1.94 and 6.55 MPa, respectively. Through comprehensive judgment, No. 3 coal seam in Changping Coal Industry was identified as non-rock burst tendency. The bending energy indexes of roof and floor strata of No. 3 coal seam were calculated as 11.867 kJ and 7.174 kJ respectively, both of which were less than 15 kJ, and the roof and floor strata were classified as non-rock burst tendency. In accordance with the comprehensive index method of coal seam geological factors and mining technical factors, the rock burst risk level of No. 3 coal seam in Changping Coal Industry was evaluated as non-rock burst risk. The relevant test data were provided in this research, which can supply basic parameters and decision-making bases for mine mining and rock burst prevention and control, and the safe and efficient production of the mine was guaranteed.
|
|
|
|
|
|
| [ 1 ] 张科学,朱俊傲,何满潮,等. 向斜作用下回采巷道冲击地压力学分析及冲击特性研究[ J ]. 煤炭科学技术,2022,50( 7 ):84 - 98.
[ 2 ] 潘一山,代连朋. 煤矿冲击地压发生理论公式[ J ]. 煤炭学报,2021,46( 3 ):789 - 799.
[ 3 ] 庞彩龙,武东雷,范泽军. 润东煤矿3号煤层及顶底板冲击倾向性研究[ J ]. 山东煤炭科技,2023,41 ( 6 ):155 - 157.
[ 4 ] 杜孝杰. 万峰煤矿1号煤层冲击倾向性测定及分析研究[ J ]. 能源技术与管理,2022,47( 2 ):108 - 110.
[ 5 ] 申虎强. 煤矿冲击地压预测防治技术研究分析[ J ]. 内蒙古煤炭经济,2021( 18 ):54 - 55.
[ 6 ] 李乃录,屈振祖,史 鑫. 基于弯曲能量法的煤层底板冲击倾向性研究[ J ]. 山东煤炭科技,2021,39( 101 ):191 - 193.
[ 7 ] 王俊虎,史庆稳,赵 昀,等. 变宽度孤岛工作面回采期间冲击危险性数值评估研究[ J ]. 中国矿业,2024,33 ( 9 ):139 - 146.
[ 8 ] 赵明宇. 西上庄煤矿3号煤层冲击危险性的分析与研究[ J ]. 西部探矿工程,2024,36( 4 ):116 - 119.
[ 9 ] 潘俊锋,刘少虹,马文涛,等. 陕西煤矿冲击地压发生规律与分类防治[ J ]. 煤炭科学技术,2024,52 ( 1 ):95 - 105.
[ 10 ] 尹延春,赵同彬,李海涛,等. 不同加载刚度下煤体冲击倾向性测试及评价指数分析[ J ]. 岩石力学与工程学报,2023,42 ( 12 ):2 982 - 2 992.
[ 11 ] 杜 平. 构造应力与动力系统对冲击地压控制作用研究[ D ]. 阜新:辽宁工程技术大学,2013.
[ 12 ] 雷 毅. 冲击危险性评价模型的建立及应用研究[ D ]. 北京:煤炭科学研究总院,2005.
[ 13 ] 安 璐. 鑫源煤矿9号煤层开采冲击危险性评价[ J ]. 煤炭与化工,2021,44 ( 3 ):11 - 14.
[ 14 ] 焦 彪,马宏源,郝宝利,等. 强冲击特厚煤层见方复合构造区域降载防冲技术研究[ J ]. 工矿自动化,2025,51( 4 ):146-152. |
|
|
|