Anti-scour reinforcing agent for low-permeability coal seam water injection

Abstract

The invention provides an anti-scour reinforcing agent for low-permeability coal seam water injection. In the reinforcing agent, a chelation type surface active agent N-acyl ED3A and a non-polar electrolyte are selected as a reinforcing agent composite additive. The N-acyl ED3A can act with mineral substances glued into a coal body, an adhesive is transformed into a soluble state from an insolublestate, and a very stable chelate complex is formed; the inner diameter of pores in the coal is increased, and the fluidity of water in the pores is improved; the N-acyl ED3A has the advantages of a surface active agent, the surface tension is reduced, and the wettability of the coal is improved.

Description

technical field [0001] The invention belongs to the field of coal seam liquid injection, in particular to a low-permeability coal seam water injection anti-scour enhancer and a water injection effect detection device, and belongs to the coal mine anti-scour technical field. Background technique [0002] Rock burst is one of the major natural disasters in coal mines, which is related to mine production efficiency and mine fate. The coal seam water injection technology can change the physical and mechanical properties of the coal body and the distribution of the stress field of the surrounding rock, and reduce the risk of dynamic disasters in the working face. It is a commonly used technology for the prevention and control of coal mine dynamic disasters. In recent years, most coal mines in my country have used coal seam water injection to prevent and control rock burst. [0003] With the rapid increase of coal consumption in my country, the mining depth of coal mines is getti...

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Problems solved by technology

However, the drilling cuttings method takes a long time to operate, the workload is heavy, and the predicted operation time is also long, which has a certain impact on production

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