Research on control technology of coordinated hydraulic fracture under complicated hard rock strata condition

被引：0
|
作者：
Li Y. [1 ,2 ,3 ]
Zhang H. [4 ]
Su H. [2 ,5 ]
Zhao S. [1 ]
Ma F. [2 ,5 ]
Li H. [3 ]
Li Y. [1 ,2 ,3 ]
Sun D. [2 ,5 ]
Huang C. [2 ,5 ]
机构：
[1] China Coal Research Institute, Beijing
[2] Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Shandong, Jinan
[3] Deep Mining and Rockburst Revention Institute, Chinese Institute of Coal Science, Beijing
[4] Mining Institute, Liaoning Technical University, Liaoning, Fuxin
[5] Coalfield Geological Planning Survey, Research Institute of Shandong, Shandong, Jinan
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2023年 / 40卷 / 04期
关键词：
extra-thick seam; hard rock; hydraulic fracturing; microseismic monitoring; plate-shell theory; working resistance of hydraulic support;
D O I：
10.13545/j.cnki.jmse.2022.0254
中图分类号：
学科分类号：
摘要：
The research on the coordinated hydraulic fracturing control technology of complicated hard rock layers is carried out in the paper. A method is proposed for the spatial position of intricate hard rock strata based on the theory of plate-shell mechanics, and for determining the fracturing target layer with the elastic energy index. The technical scheme of ground and underground coordinated fracturing is established, and industrial experiments are conducted, based on the background of a fully mechanized caving coal mine in the Carboniferous extra-thick coal seam in the Datong mining area. The adaptability and effectiveness of the ground and underground coordinated fracturing technology are confirmed by analyzing the microseismic, hydraulic support working resistance monitoring data and the advanced support form of tailgate. The results show that hard rock strata can be fractured with coordinated ground and underground fracturing technology obviously. Integrity and strength of hard rock strata are destroyed. The average weighting step is reduced by 34. 6%, the average working resistance of hydraulic support is reduced by 15. 1%, and the deformation of tailgate is reduced by 35. 0% . The research results pave the way for the control of hard rock strata technically and of complicated hard rock. formations. © 2023 China University of Mining and Technology. All rights reserved.
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页码：704 / 713
页数：9
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