公开(公告)号：US20250154868A1

公开(公告)日：2025-05-15

申请号：US18425890

申请日：2024-01-29

Applicant: Taiyuan University of Technology

Inventor： Guorui Feng ,  Xiaoze Wen ,  Jun Guo ,  Ruipeng Qian ,  Wenbo Huang ,  Jie Zhang ,  Wenming Feng ,  Zi Wang ,  Xu Zhang

IPC: E21C41/18 ,  E21C37/18

Abstract: An electric-pulse fracturing device for hard roof of coal mine based on a self-sealing water bag and an using method thereof are provided. The device includes a power switch, a charging power supply, a current limiting protection resistor, an energy storage capacitor and a high-voltage electric pulse switch connected in sequence. The energy storage capacitor is connected with an end of a gas gap switch, an other end of the gas gap switch is connected with an assembled self-sealing water bag high-voltage electric pulse electrode structure through a high-voltage cable, and the electrode structure is fixed through an assembly rod. The self-sealing water bag high-voltage electric pulse electrode structure includes a self-sealing water bag and an electrode structure capable of focusing shock wave energy, and the number of the self-sealing water bag high-voltage electric pulse electrode structure depends on fracturing effect.

公开(公告)号：US11959383B2

公开(公告)日：2024-04-16

申请号：US17752842

申请日：2022-05-24

Applicant: Taiyuan University of Technology

Inventor： Guorui Feng ,  Yijiang Fan ,  Pengfei Wang ,  Chenliang Hao ,  Xiaoze Wen ,  Jun Guo ,  Jinwen Bai ,  Tingye Qi ,  Jianan Liu ,  Linjun Zhu ,  Changquan Wu

IPC: E21C41/18 ,  E21D20/02

CPC classification number: E21C41/18 ,  E21D20/028

Abstract: A method for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining. A return air gateroad of a stoping face and an inlet air gateroad of a heading face are not on the same level. The return air gateroad of the stoping face is arranged along a roof of a coal seam. The inlet air gateroad of the heading face is arranged along a floor of the coal seam. There is a height difference between the return air gateroad and the inlet air gateroad in a vertical direction. During the construction process, the inlet air gateroad is excavated at a delay distance of 180-200 meters from the return air gateroad. The drilling and grouting are performed while excavating the roadway, where grouting holes are arranged in a single row. A device for implementing the method is also provided.