采矿与安全工程学报2017，Vol.34Issue(5)：1008-1014,7.DOI:10.13545/j.cnki.jmse.2017.05.027
中深部煤层开采条件下氡气探测应用初步探索
Preliminary study on radon detection application under condition of mid-deep coal seam mining
摘要
Abstract
Due to severe problems caused by rock mass failure in the underground coal mining, the mechanism and critical conditions of rock mass failure have attracted attentions from the field of rock mechanics. Based on the mining and geological conditions of 2507# working face in Hengjian coal mine, Handan mining field, the correlation between radon concentration changes and mining-induced surface cracks evolution has been preliminarily studied under the conditions of mid-deep coal seam mining. The field test results show that the first weighting interval of 2507# working face is about 45 m and periodic weighting average interval is about 15 m according to the radon measurement data. The results are basically agree with the underground mine pressure observation results and have a corresponding relation with the surface deformation cracks, which has further validated the feasibility of radon detection ap-plication under the conditions of mid-deep coal seam mining. Based on those, the concept of anomaly coefficient of radon (k) has been put forward, and the critical valuek (no less than 15%) has been de-termined for predicting the breakage of main roof in overburden of 2507# working face. Finally, pro-spects of radon detection had been proposed, such as the comprehensive detection methods, factors af-fecting radon exhalation, migration mechanism fissured rock mass and error adjustment of radon detec-tion.关键词
氡气探测/中深部煤层/采动覆岩/可行性/氡气异常系数Key words
radon detection/mid-deep coal seam/mining-induced overburden/feasibility/abnormal coefficient of radon分类
矿业与冶金引用本文复制引用
张炜,张东升,胡文敏,杨志,李鹏..中深部煤层开采条件下氡气探测应用初步探索[J].采矿与安全工程学报,2017,34(5):1008-1014,7.基金项目
国家重点基础研究(973)计划项目(2015CB251600) （973）
国家自然科学基金项目(51404254,41601500) （51404254,41601500）
煤矿安全高效开采省部共建教育部重点实验室开放基金项目(JYBSYS2015106) （JYBSYS2015106）
江苏省"青蓝工程"项目(苏教师[2016]15号) （苏教师[2016]15号）
江苏省自然科学基金项目(BK20140186) （BK20140186）
