文献类型：期刊文献

英文题名：Study on Blasting Technology for Open-Pit Layering of Complex Mine Adjacent to High and Steep Slope

作者：Wang, Menglai[1];Li, Xiaoshaung[2,3,4];Li, Qihang[5];Hu, Yunjin[3];Chen, Qiusong[6];Jiang, Song[7]

机构：[1]Yunnan Phosphate Grp Co Ltd, Kunming, Yunnan, Peoples R China;[2]Shaoxing Univ, Sch Civil Engn, Shaoxing, Peoples R China;[3]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing, Peoples R China;[4]Qilu Inst Technol, Coll Civil Engn, Jinan, Shandong, Peoples R China;[5]Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou, Peoples R China;[6]Cent South Univ, Sch Resources & Safety Engn, Changsha, Hunan, Peoples R China;[7]Xian Univ Architecture & Technol, Sch Resources Engn, Xian, Shaanxi, Peoples R China

年份：2021

卷号：9

外文期刊名：FRONTIERS IN EARTH SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000726124400001)、、Scopus(收录号：2-s2.0-85120536087)、WOS

基金：This work was supported by National Natural Science Foundation of China (No.41867033) and Postdoctoral Science Foundation of China (No. 2019M650144) and State Key Laboratory of Safety and Health for Metal Mines (zdsys 2019-005). The authors wish to acknowledge these supports.

语种：英文

外文关键词：open-pit mine; high and steep slope; blasting technology; blasting vibration; numerical simulation

外文摘要：In China, mining blasting vibration has seriously threatened the safety and stability of high and steep rock slopes. In this paper, taking the east mining area of Jianshan Phosphorus Mine as the research background, combined with field survey, field blasting test, numerical simulation and theoretical analysis, we systematically studied the adjacent high-steep rock slope and the layered blasting technology of complex ore. Based on wide hole spacing blasting numerical simulation and field tests, the use of 8 x 4 m hole network parameters, oblique line hole-by-hole initiation method, detonator delay using 35 ms between holes, 65 ms between rows and 500 ms within the holes, the rock mass rate was reduced and the drilling workload was decreased. In addition, regression analysis was carried out on a large amount of vibration test data, and the attenuation law and propagation law of blasting vibration of adjacent high and steep slopes were predicted, which provided a reference for mine production blasting. By establishing a mathematical model of cumulative damage of rock mass blasting, it shows that the depth of impact of mining blasting on the slope of Jianshan open-pit was 0-3.6m, but the blasting did not cause overall damage to the adjacent high and steep slopes. In the future, this model can be used to predict rock damage caused by subsequent blasting.