Taiyuan University of Technology

Jun Guo

Guorui Feng

Jinwen Bai

Xudong Shi

Xiaoze Wen

Kai Wang

Tingye Qi

Boqiang Cui

Xinyu Yang

Cheng Song

Jiancheng Song

Haotian Wu

Pengfei Wang

Muqin Tian

Chunyu Xu

Wenming Feng

Wenbo Huang

Jie Zhang

Zi Wang

Jiachen Mi

Fei Chang

Guowei Wu

Ruikai Pan

Yanna Han

Junbiao Ma

Xu Zhang

Ruipeng Qian

Changquan Wu

Linjun Zhu

Jianan Liu

Chenliang Hao

Yijiang Fan

Zexin Geng

Yayun Yu

Lingyan Lin

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.

Electric-pulse fracturing device and method for hard roof of coal mine based on self-sealing water bag

Disclosed is a method for backfilling and reconstructing a carbon storage space in an abandoned main roadway and storing CO. A surrounding rock of the main roadway is surveyed through geophysical exploration technology, and an anchor bolts (anchor cables) are used to reinforce and support an area which has unstable confining pressure bearing. According to a width and a height of the roadway section of the main roadway, a support formwork is forged in advance, and after the support formwork is placed in the main roadway, backfilling slurry is injected to the periphery of the support formwork. Meanwhile, supercritical carbon dioxide is injected into the backfilling slurry and the roadway, respectively.

Method for backfilling and reconstructing carbon storage space in abandoned main roadway and storing CO

A loading system for a Hopkinson pressure bar test under water-gas-temperature multi-field coupling action includes: a sample sealed cabin which includes sealing flanges, Y-shaped and high-temperature resistant sealing rings, and a sealed cabin body; a gas pressure loading device which includes a high-pressure gas tank, a pressure regulating valve, a second barometer, a second high-pressure valve and a first three-way valve connected in sequence; a water pressure loading device which includes an electric pressure test water pump, a water pressure gauge, an accumulator and a one-way valve connected in sequence; a temperature loading device which includes thermocouple heating rods, a temperature display and a thermocouple temperature control circuit board connected in sequence; and a dynamic and static combined loading device which includes an axial pressure loading device, an impact loading device and a Hopkinson pressure bar member.

Loading system and method for Hopkinson compression bar test under water-gas-temperature multi-field coupling action

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.

Method and device for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining

A method for realizing a centralized control platform for large fully-mechanized coal mining face equipment is provided. In the method, on the basis of a coal cutter system, a hydraulic support system, a coal mining face transportation system, an emulsion pump station system, a mobile transformer substation system and a video monitoring system of the large fully-mechanized coal mining face equipment, real-time monitoring, centralized coordination control and information communication network are realized by a high-speed embedded computer UNO-3072A, a high-speed data acquisition card PCI-1716, a PowerBuilder front-end development platform, an SQLServer database, a Modbus TCP/IP communication protocol and an industrial Ethernet, thereby realizing centralized control over the large underground fully-mechanized coal mining face equipment. Automated production of fully-mechanized coal mining faces is realized.

Method for realizing centralized control platform for large fully-mechanized coal mining face equipment

Growing community of inventors

Taiyuan, China

Jun Guo