季节性岩土强度差异下的靠帮开采及效益分析
Analysis of steep mining and benefit based on seasonal difference of rock and soil strength
-
摘要: 为充分利用露天煤矿边坡岩土强度的季节性差异，提高冬季开采时的端帮边坡角，增加煤炭资源采出量;基于季冻土强度理论和冻融作用下的直接剪切试验，运用Geo-Slope稳定性分析软件，结合冬夏两季边坡岩层的物理力学参数，在满足规范要求的端帮稳定性系数的基础上，计算冬夏两季端帮可达到的最大安全角度和冬季端帮稳定性系数强化幅度。结果表明：相同边坡角时，夏季到冬季端帮稳定性系数Fs增大，稳定性系数平均强化幅度为7.34%；季节性靠帮开采方案可将端帮边坡角从夏季的39°提高到冬季的41°；基于岩土强度季节性差异的靠帮开采，提高端帮煤炭回收量8.11万t，增加经济效益654.05万元；利用增加内排压帮土方量3 600 m3的方式可以保障过渡期内端帮的安全性。
Abstract: For making full use of seasonal difference of rock and soil strength of open-pit coal mine slope, improving the angle of end-slope during mining in winter and increasing the extraction amount of coal, based on the strength theory of seasonally frozen soil and the direct shear experiment under the action of freeze-thaw, using the Geo-Slope stability analysis software, combined with physical and mechanical parameters of slope strata in winter and summer, on the basis of meeting the stability coefficient of end-slope required by regulations, this paper calculates the maximum safety angle in winter and summer as well as the enhancing range of end-slope stability coefficient in winter. The results show that: with the same angle of slope, Fs increases from summer to winter, and the average enhancing range of stability coefficient at different angles is 7.34%. Seasonal steep mining is able to increase the angle of end-slope from 39° in summer to 41° in winter. Based on steep mining under the seasonal difference of rock and soil strength, increase coal recovery of end-slope by 81 100 t and economic benefit by 6.540 5 million yuan; the safety of the end wall in the transition period can be guaranteed by increasing the amount of earth of the inner pressure displacement wall by 3 600 m3.
-
-
[1] 王淼.季冻土力学特性及试验技术研究[J].国际地震动态,2018(10):43. WANG Miao. Research on mechanical properties and testing technique of seasonally frozen soils[J]. Recent Developments in World Seismology, 2018(10): 43.
[2] 吴榕真,李新鹏,韩流,等.稳排速度对排土场力学参数及稳定性影响规律研究[J].化工矿物与加工,2018,47(10):32-35. WU Rongzhen, LI Xinpeng, HAN Liu, et al. Study on influence law of steady dumping velocity on mechanical parameters and stability in dump[J]. Industrial Minerals & Processing, 2018, 47(10): 32-35.
[3] 刘亚栋,杨雪强,徐雷,等.考虑土体强度各向异性的边坡稳定性分析[J].广东工业大学学报,2018,35(6):57-62. LIU Yadong, YANG Xueqiang, XU Lei, et al. A stability analysis of slope considering strength anisotropy in soils[J]. Journal of Guangdong University of Technology, 2018, 35(6): 57-62.
[4] 吴榕真,尚涛,韩流,等.准东煤矿靠帮开采南端帮稳定性动态分析[J].煤矿安全,2019,50(1):231-233. WU Rongzhen, SHANG Tao, HAN Liu, et al. Dynamic stability analysis of southern steep end-slope mining in zhundong coal mine[J]. Safety in Coal Mines, 2019, 50(1): 231-233.
[5] 罗科,吕贵龙,段裕勤.端帮靠帮开采与搭桥内排相结合开采技术的应用[J].煤炭技术,2020,39(1):50. LUO Ke, LYU Guilong, DUAN Yuqin. Combined application of steep end-slope mining and pit-middle bridging in open pit mining[J]. Coal Technology, 2020, 39(1): 50.
[6] 齐吉琳,马巍.冻土的力学性质及研究现状[J].岩土力学,2010,31(1):133-143. QI Jilin, MA Wei. State-of-art of research on mechanical properties of frozen soils[J]. Rock and Soil Mechanics, 2010, 31(1): 133-143.
[7] OTHMAN M A, BENSON C H. Effect of freeze-thaw on the hydraulic conductivity and morphology of compacted clay[J]. Canadian Geotechnical Journal, 1983, 30(2): 236-246. [8] 朱磊,谢强,任新红,等.川藏线季节性粗颗粒冻土抗剪强度特性试验研究[J].铁道学报,2018,40(3):107-111. ZHU Lei, XIE Qiang, REN Xinhong, et al. Experimental study on shear strength of seasonal coarse-grained frozen soil along sichuan-tibet railway[J]. Journal of the China Railway Society, 2018, 40(3): 107-111.
[9] 雷乐乐,谢艳丽,王大雁,等.冻土静力学室内试验研究进展[J].冰川冻土,2018,40(4):802-811. LEI Lele, XIE Yanli, WANG Dayan, et al. Laboratory studies of frozen soil statics: recent progress and prospect[J]. Journal of Glaciology and Geocryology, 2018, 40(4): 802-811.
[10] 陈爽,吴榕真,韩流,等.露天煤矿端帮张裂缝对边坡稳定性的影响[J].煤矿安全,2019,50(11):228. CHEN Shuang, WU Rongzhen, HAN Liu, et al. Influence of end slope with a tensile fracture on slope stability in open-pit coal mine[J]. Safety in Coal Mines, 2019, 50(11): 228.
[11] 刘素锦,郭明伟,李春光.三维边坡整体主滑方向的确定[J].岩土力学,2018,39(S2):37-44. LIU Sujin, GUO Mingwei, LI Chunguang. Determination of main sliding direction for three-dimensional slope[J]. Rock and Soil Mechanics, 2018, 39(S2): 37-44.
[12] 尚涛,韩流,舒继森,等.节地减损开采模式下边坡结构及应力发展规律[J].煤炭学报,2019,44(12):3644-3654. SHANG Tao, HAN Liu, SHU Jisen, et al. Slope structure and stress development rule under mining mode of land saving and ecological detraction[J]. Journal of China Coal Society, 2019, 44(12): 3644-3654.
[13] 韩流,舒继森,尚涛,等.排土场散体软岩重塑物理力学参数研究[J].采矿与安全工程学报,2019,36(4):820-826. HAN Liu, SHU Jisen, SHANG Tao, et al. Experiment study on the physical and mechanical parameters of soft rock remolding in waste dump[J]. Journal of Mining & Safety Engineering, 2019, 36(4): 820-826.
-
期刊类型引用(11)
1. 庄颖，蒋嘉明，屠兴刚，刘子毅，张金良，郝宇. 基于ISM和变权云模型的售电公司综合能力评价. 供用电. 2024(11): 78-90 . 
百度学术
2. 任江朋. 基于AHP-TOPSIS的煤矿安全风险评价探讨. 山西焦煤科技. 2023(05): 49-53 . 百度学术
3. 曾阿锋，方金城，胡增开. 基于AHP-灰云模型的智能制造企业生产安全评价研究. 工业安全与环保. 2023(08): 29-34 . 百度学术
4. 李岳，胡宇祺，蔡靖，戴轩. 基于变权重-正态云模型的飞机轮胎滑水风险. 北京航空航天大学学报. 2023(09): 2299-2305 . 百度学术
5. 成庆林，季帅，孟岚，田春雨，孙巍. 基于组合赋权-灰色关联的输油泵机组能效评价. 当代化工. 2022(03): 625-629+633 . 百度学术
6. 谭丕成，冯方，刘宇，曾辉斌，潘虹，赵彪，尹贵恒. 基于变权云模型的灯泡贯流式水轮机状态评估方法. 排灌机械工程学报. 2022(08): 807-813 . 百度学术
7. 贾世有，田虎军，薛勇，张海军，谢正红. 隐患视角下煤矿系统韧性安全及其评估框架研究. 能源技术与管理. 2022(04): 130-133 . 百度学术
8. 张茗涵，张海云，方前程，周光宏. 高烈度地震带尾矿坝体稳定性分析模型研究. 矿业研究与开发. 2021(01): 105-110 . 百度学术
9. 黄琪嵩，焦玉婷，许波，赵艺璇，孙凯. 基于组合赋权灰云模型的老空区建设场地稳定性评价研究. 现代矿业. 2021(02): 194-197 . 百度学术
10. 姚宁. 基于三支决策的煤矿安全评价研究. 内蒙古煤炭经济. 2021(17): 114-115 . 百度学术
11. 王大贤，姚德利. 现代煤矿安全管理研究的特征与启示. 安徽理工大学学报(社会科学版). 2020(06): 49-53 . 百度学术
其他类型引用(2)
计量
- 文章访问数: 29
- HTML全文浏览量: 0
- PDF下载量: 0
- 被引次数: 13
下载:
