Abstract:
Soft coal seams,as a special type of coal resource,are characterized by high moisture content,low strength,and complex pore structure. As an important innovation in the field of coal mining,the dehydration and permeability enhancement technology for soft coal seams is of great significance for improving the efficiency of coalbed methane mining,ensuring coal mine safety,and promoting environmental protection. This article analyzes coal seams with different structures. In coal seams with a dominant pore structure,the permeability increases from 0. 35 m D to 0. 56 m D after the moisture content decreases from 4. 8% to an anhydrous state,with an increase ratio of up to 60% for the permeability. And through experiments in different coal mines,the application of different waterless and permeability enhancement technologies in soft coal seams has achieved significant results,not only improving the permeability of coal seams,but also improving the mining conditions of coal mines.