文献类型：期刊文献

英文题名：Characteristics of Overburden Failure and Fracture Evolution in Shallow Buried Working Face with Large Mining Height

作者：Shi, Xiuchang[1];Zhang, Jixing[2]

第一作者：Shi, Xiuchang

通讯作者：Shi, XC[1]

机构：[1]Henan Univ Econ & Law, Sch Engn Management & Real Estate, Zhengzhou 450046, Peoples R China;[2]Geol Survey Jiangsu Prov, Nanjing 210018, Peoples R China

第一机构：河南财经政法大学工程管理与房地产学院

通讯机构：[1]corresponding author), Henan Univ Econ & Law, Sch Engn Management & Real Estate, Zhengzhou 450046, Peoples R China.|[1048420]河南财经政法大学工程管理与房地产学院;[10484]河南财经政法大学;

年份：2021

卷号：13

期号：24

外文期刊名：SUSTAINABILITY

收录：;Scopus(收录号：2-s2.0-85121237328);WOS:【SSCI(收录号:WOS:000737420600001)，SCI-EXPANDED(收录号:WOS:000737420600001)】；

基金：FundingThis research was supported by the National Natural Science Foundation of China (Grant No. 42072204) and the Henan Province Scientific and Technological Plan Project (Grant Nos. 202102310218, 212102310818).

语种：英文

外文关键词：overburden failure; fractured zone; similar material model; fracture rate; shallow buried coal seam; longwall mining; Daliuta coal mine

摘要：In order to solve the issues of uncertain overburden failure height and water loss at the Daliuta coal mine, the collapse characteristics of overburden and the development height of water-conducting fractured zone were studied by using physical modeling, FLAC 3D numerical simulation, and field observation, which were used to verify each other. In order to quantitatively analyze the distribution characteristics of fracture rate of overlying rock mass in goaf, the overburden collapse image was binarized. The results showed that: (1) the failure characteristics of overburden in goaf obtained by the three research methods were roughly consistent, and the reliability of the results was high. The overburden failure height of No. 5(-2) coal with large mining height was 137.32-153 m, which was 20.8-23.2 times the mining height. (2) The repeated mining of No. 5(-2) coal intensified the further failure of the disturbed rock mass in the No. 2(-2) coal goaf. (3) In the horizontal direction of the goaf, the fracture rate of rock mass was distributed in the shape of "saddle". In the longitudinal direction of the goaf, the rock mass fracture rate decreased in a logarithmic function with the increase of the height from the mining coal seam. Overall, the conclusions are of engineering significance for accurately adopting water resources protection mining technology and reducing mine water inrush disasters.