Safety evaluation on room pillar mining of steep thick orebody

HE Ning

doi:10.12075/j.issn.1004-4051.2020.07.021

CHINA MINING MAGAZINE > 2020 > 29(7): 143-147. > DOI: 10.12075/j.issn.1004-4051.2020.07.021

HE Ning. Safety evaluation on room pillar mining of steep thick orebody[J]. CHINA MINING MAGAZINE, 2020, 29(7): 143-147. DOI: 10.12075/j.issn.1004-4051.2020.07.021

Citation:

HE Ning. Safety evaluation on room pillar mining of steep thick orebody[J]. CHINA MINING MAGAZINE, 2020, 29(7): 143-147. DOI: 10.12075/j.issn.1004-4051.2020.07.021

Citation:

HE Ning. Safety evaluation on room pillar mining of steep thick orebody[J]. CHINA MINING MAGAZINE, 2020, 29(7): 143-147. DOI: 10.12075/j.issn.1004-4051.2020.07.021

PDF (3873 KB)

Safety evaluation on room pillar mining of steep thick orebody

HE Ning

North China University of Science and Technology, Sanhe 065201, China

More Information

Received Date: February 11, 2020
Available Online: April 19, 2023

Graphical Abstract

Abstract

Abstract

After the integration of Xiapingtian calcite mine, it is urgent to evaluate the process parameters under the new mining conditions.Based on the condition of open stope mining method for steeply inclined thick orebody, the stability of the width of rock(vertical) pillar is calculated and analyzed according to the theory of limit equilibrium of strata.The deeper the mining depth is, the larger the width of rock pillar is, leaving 8.0m in the +200 m section, 9.0 m in the +150 m section and 10.0 m in the +100 m section.According to the theory of rock mechanics, the open field span is calculated and analyzed.The deeper the mining depth is, the smaller the open field span is.The span is 60 m in +200 m section, 45 m in +150 m section and +100 m section.UDEC software is used to analyze the mining process.The bearing arch structure formed in the roof of each section after mining makes the empty field and rock pillar stable.The engineering practice shows that it is safe and reliable to mine with the optimized mining process parameters.
- steep thick bed,
- sublevel open field,
- ore retention method,
- UDEC software

FullText(HTML)

References (13)

References

[1]	邢志华, 程传召.大红山铁矿Ⅲ矿体、Ⅳ矿体分段空场采矿法爆破参数的优化试验及应用[J].中国矿业, 2018, 27(S1):222-225. XING Zhihua, CHENG Chuanzhao.Optimization test and application of blasting parameters for sublevel open stope mining of ore bodies Ⅲ and Ⅳ in Dahongshan iron mine[J].China Mining Magazine, 2018, 27(S1):222-225.
[2]	杜计平, 孟宪锐.采矿学[M].徐州:中国矿业大学出版社, 2009.
[3]	刘伟.盘区无底柱分段空场崩落联合采矿法在CDK矿区的应用[J].现代矿业, 2019, 35(11):144-156. LIU Wei.Application of sublevel open stope caving combined mining method without sill pillar in CDK mining area[J].Modern Mining, 2019, 35(11):144-156.
[4]	张世雄.固体矿物资源开发工程[M].武汉:武汉理工大学出版社, 2010.
[5]	张凯.沿空掘巷窄煤柱合理宽度设计研究[J].能源与环保, 2019, 41(11):159-166. ZHANG Kai.Study on reasonable width design of narrow coal pillars in roadway along goaf[J].China Energy and Environmental Protection, 2019, 41(11):159-166.
[6]	杨俊哲, 宋桂军, 付强, 等.综放工作面多巷布置双煤柱合理留设宽度研究[J].矿业安全与环保, 2019, 46(6):25-34. YANG Junzhe, SONG Guijun, FU Qiang, et al.Study on reasonable retention width of double pillars in multi-roadway layout in fully mechanized working face[J].Mining Safety & Environmental Protection, 2019, 46(6):25-34.
[7]	丁鑫品, 郭继圣, 李绍臣, 等.综放开采条件下上覆岩层“两带”发育高度预计经验公式的确定[J].煤炭工程, 2012, 44(12):75-78. DING Xinpin, GUO Jisheng, LI Shaochen, et al.Determination of the empirical formula for predicting the development height of “two zones” of overlying strata under the condition of fully mechanized caving mining[J].Coal Engineering, 2012, 44(12):75-78.
[8]	马俊生, 任高峰, 张聪瑞, 等.基于稳定性图表法和数值模拟的采场跨度优化研究[J].中国矿业工程, 2017, 46(6):7-14. MA Junsheng, REN Gaofeng, ZHANG Congrui, et al.Study on optimization of stope span based on stability chart method and numerical simulation[J].China Mining Engineering, 2017, 46(6):7-14.
[9]	钱鸣高, 缪协兴, 许家林, 等.岩层控制的关键层理论[M].徐州:中国矿业大学出版社, 2000.
[10]	石磊.李楼铁矿南部矿体采矿方法探讨与研究[J].矿冶工程, 2015(10):28-29. SHI Lei.Discussion and research on mining method of south orebody of Lilou iron mine[J].Mining and Metallurgy Engineering, 2015(10):28-29.
[11]	晓春.高山复杂矿体采场结构参数优化研究[J].采矿技术, 2009(1):1-3. XIAO Chun.Study on optimization of stope structural parameters of complex ore bodies in high mountains[J].Mining Technology, 2009(1):1-3.
[12]	陈翔.夏楼铁矿采场跨度优选数值模拟研究[J].南华大学学报(自然科学版), 2018, 32(5):44-49. CHEN Xiang.Numerical simulation study on optimization of stope span in Xialou iron mine[J].Journal of Nanhua University(Natural Science Edition), 2018, 32(5):44-49.
[13]	周传波, 郭廖武, 姚颖康, 等.采矿巷道围岩变形机制数值模拟研究[J].岩土力学, 2009, 30(3):654-658. ZHOU Chuanbo, GUO Liaowu, YAO Yingkang, et al.Numerical simulation of deformation mechanism of surrounding rock in mining roadway[J].Geotechnical Mechanics, 2009, 30(3):654-658.