China University of Mining and Technology (CUMT)

Xuzhou Boan Science & Technology Development Co., Ltd

Nanjing Southern Element Biotechnology Co., Ltd.

Yang Zhao

Wei Yang

Baiquan Lin

Qingzhao Li

Jianfa Zhang

Ni Wang

Oligosaccharide riclinoctaose is used in preparation of a drug for treating and/or preventing ischemia-reperfusion injury (IRI). The oligosaccharide riclinoctaose has a structural formula as follows: The oligosaccharide riclinoctaose can significantly relieve postoperative liver injury, kidney injury, and brain injury in ischemia-reperfusion mice.

Use of oligosaccharide riclinoctaose in preparation of drug for treating and/or preventing ischemia-reperfusion injury (IRI)

A method for extracting gas by fracturing a coal seam through a combination of hydraulic slotting and multi-stage combustion impact wave comprises cutting slots in an impact borehole using a hydraulic slotting equipment to perform pressure relief and permeability enhancement on a coal seam and enlarge a N(nitrogen gas) or CO(carbon dioxide gas) storage space, injecting a large amount of Nor COinto the borehole by means of a high pressure gas cylinder and a pressure reducing valve through a gas injection and extraction pipe, then injecting a certain amount of methane and dry air into a high-temperature and high-pressure combustion chamber by means of the high pressure gas cylinder and the pressure reducing valve, so that the gases are mixed and combusted to form high-temperature and high-pressure impact wave to push a piston to compress the Nor CO, thereby generating a large number of factures on the coal seam around the impact borehole under guiding action of the slots. The impact wave is repeatedly generated to form a multi-stage impact, and the impact of the next stage is based on the impact of the previous stage, so that the fractures on the coal seam around the borehole are further expanded and run through. After the Nor COis compressed by means of the multi-stage impact, more fracture networks are formed on the coal seam around the borehole under the guiding action of the slots and the fractures, thereby enhancing the borehole-based efficient gas extraction.

Method for extracting gas by fracturing coal seam through combination of hydraulic slotting and multi-stage combustion impact wave

A multi-stage combustion impact wave coal mass cracking and heat injection alternating intensified gas extracting method is provided. A large amount of Nor COis injected into a drill hole by a heat injection and gas injection extracting pipe and by a high-pressure gas cylinder and a reducing valve, then a certain amount of methane and dry air are injected into a high-temperature and high-pressure combustion chamber by the high-pressure gas cylinder and the reducing valve, to be mixed and combusted to form high-temperature and high-pressure impact wave. High-temperature vapour is injected into the drill holes by the heat injection and gas injection extracting pipe to promote desorption of the coal masses.

Multi-stage combustion impact wave coal mass cracking and heat injection alternating intensified gas extracting method

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Jiangsu, China

Yang Zhao