河南理工大学学报（自然科学版）2024，Vol.43Issue(4)：29-38,10.DOI:10.16186/j.cnki.1673-9787.2023030003
基于相似模拟试验的顶板导水裂隙带高度及发育形态研究
Study on height and development form of roof water flowing fractured zone based on similar simulation test
摘要
Abstract
Objectives In order to study the height and development form of roof water-conducting fracture zone under the influence of mining,Methods a similar simulation test was carried out on the 1303 working face in the third mining area of Sima Coal Mine.Based on this,by changing the lithological combination of roof,the development height and shape of roof fracture zone in different lithological combinations were ana-lyzed and verified theoretically by digital photogrammetry system.Results The application results showed that:(1)When the advancing length of the working face was 160 m,the maximum development height of the leading fracture zone of the hard rock lithologic roof model,the hard-soft rock lithologic combination roof model and the soft rock lithologic roof model were 69.6 m,55.6 m and 61.1 m respectively.(2)The de-velopment patterns of the three models were the normal trapezoid with a bottom angle of 50°,the approxi-mate normal trapezoid with a front bottom angle of 62° and a rear bottom angle of 60°,and the trapezoid with a front bottom angle of 50° and a rear bottom angle of 60°.(3)Based on the results of model test and statistical data,a prediction expression for the development height of water-channeling fracture zone in the south of Ergangshan fault-fold belt in Changzhi was given.(4)Using the method of material mechanics,the formation law of collapse angle was analyzed.The results showed that the relationship between the collapse angle and the development height of the pilot fracture zone was an arctangent function.The development angles of the front and bottom corners of the three models were calculated to be 49.24°,61.21°,and 51.12°,respectively.The development heights of the guided fracture zones in the three models were 74.1 m,51.1 m,and 59 m respectively,which were consistent with the results of similar simulation tests.Conclusions The research results had certain reference significance for the prediction of the development height of water flow-ing fractured zone in various roof lithology coal mines.关键词
导水裂隙带/发育高度/发育形态/相似试验/顶板岩性组合Key words
water conducting fracture zone/developmental height/developmental morphology/similar test/lithologic combination of roof分类
矿业与冶金引用本文复制引用
张勃阳,张宇科,黄虎威,林志斌,李亚超..基于相似模拟试验的顶板导水裂隙带高度及发育形态研究[J].河南理工大学学报（自然科学版）,2024,43(4):29-38,10.基金项目
国家自然科学基金资助项目(41807209,51708185) （41807209,51708185）
