Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method

Abstract

The invention relates to a low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method belonging to the field of low-permeability coal seam reinforcement anti-reflection technology. The low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method adopts a low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device, and comprises the following steps of: (1) installing a monitoring element; (2) measuring the coal permeability before anti-reflection; (3) starting a high-pressure gas impact system for impacting coal briquettes in a circulating way; and (4) measuring the coal permeability after anti-reflection; and the low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device comprises a coal sample, a blasting cylinder mechanism, a triaxial loading system, a high pressure gas impact system and a coal permeability measurement system.

Description

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AI Technical Summary

Benefits of technology

This technology helps detect if there are any changes that could affect how easily it's breaking down during an explosive event or when certain parts have been damaged by other factors like heating up nearby objects. It does this through measuring its ability for water vapor transmission (permeable) while maintaining good mechanical strength.

Problems solved by technology

This patents describes various technical problem addressed in these inventions relating to prevention or reduction of permeable coal reservoirs from entering underground areas during mineral exploration operations such as oil well drillings due to their vulnerabilities with environmental factors like groundwater contamination. These techniques involve reducing pore size through methods like traditional pressures release (PTR) and improved pressure relief/anti-permeate processes. However, there are drawbacks associated with each technique mentioned above including increased risk of exploitation caused by excessively heavy charges used at depth holes creates negative effects on surrounding rocks, reduced efficiency of extracting gases produced within the rock mass, and difficulty in achieving effective control over the flow direction of fluid injection.

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