Coal and gas exploitation integrated permeability-increasing enhancer as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of efficient and safe production of mines, and discloses a coal and gas exploitation integrated permeability-increasing enhancer as well as a preparation method and application thereof. The coal and gas exploitation integrated permeability-increasing enhancer is composed of, by mass, 6%-10% of 20mol/l concentrated nitric acid, 1%-5% of N-lauroyl creatine sodium, 2%-6% of 1-butyl-3-methylimidazolium chloride and mine dustproof water. The coal and gas exploitation integrated enhancer provided by the invention can improve the wettability of a coal bodyby physicochemical modification of the coal body, inhibit and reduce the generation of dust in a coal seam exploitation process, greatly improve the permeability of the coal body, improve the coal seam occurrence and exploitation conditions, facilitate efficient development and utilization of coal seam gas, improve coal bed gas exploitation, relieve energy shortage, prevent gas disasters of underground coal mines, reduce greenhouse gas emission, facilitate efficient co-exploitation of coal and coal bed gas, and improve the safe and efficient production level of coal mines in China.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency and safe production in mines, and in particular relates to an integrated anti-reflection enhancer for coal and gas mining, a preparation method and an application. Background technique [0002] At present, coal is a strategic resource in my country, accounting for 65% and 60.3% of China's primary energy production and consumption structure respectively. 92% of coal production in my country is mined underground, and the average depth has reached 660m. Underground coal seam occurrence and mining conditions are complex, and there are problems such as low coal seam permeability, poor wettability, large mining pollution, and low efficiency. Due to the limitations of these inherent properties, there are problems such as low coal seam water injection rate, poor coal wetting performance and large pollution in the process of mining and use. Coal seam water injection technology plays an important r...

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Problems solved by technology

[0005] (1) Underground coal seam occurrence and mining conditions are complex, with low coal seam permeability, poor wettability, large mining pollution and low efficiency

[0006] (2) Due to the limitations of these inherent properties, there are low coal seam water injection rate, poor coal wetting performance and heavy pollution in the process of mining and use.

[0008] In recent years, the mining depth of my country's coal mines has continued to increase, and the level of mechanized and automated mining has gradually increased. 92% of my country's coal production is underground mining, and the average depth has reached 660m. The coal deposit and mining conditions are complex, and there are problems such as small coal seam porosity, low permeability, and poor water injection efficiency. During the production process of coal mines, coal and gas outbursts, roof accidents, and pneumoconiosis and other natural disasters are constantly escalating, resulting in a large number of losses in manpower and material resources.

At present, all kinds of coal mines in my country have more or less adopted some measures to improve the coal body structure and improve high-efficiency and safe production efficiency, such as hydraulic fracturing, hydraulic slotting, pre-splitting blasting, thermal displacement and other anti-reflection technologies; but from From the perspective of application effect, the effect is not very ideal, such as hydraulic fracturing (there are problems such as small anti-permeability range, fast crack closure, water lock effect, etc.), split water seam blasting (there are problems of consuming a lot of manpower and material resources, and there are dangers) ; Coal seam water injection (low water injection efficiency, poor coal mine application benefits, etc.), heat injection method to coal seam (water or steam heat injection method not only has low efficiency, high energy consumption, but also aggravates the water lock effect), therefore, it is urgent to explore A new type of integrated anti-reflection enhancer and preparation method for coal and gas mining to achieve efficient coal and gas extraction and efficient use of existing resources

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