Experimental Study on Comprehensive Treatment of Coal Dust and Gas by Coal Seam Water Injection in Mining Face
In order to further reduce the dust concentration and gas emission of the mining face,it is decided to carry out coal seam water injection dust and gas prevention tests to ensure that the mining face environment is more in line with the requirements of safe and civilized production.By analyzing the mechanism of coal seam water injection and conducting research on reasonable water injection pressure p,water injection time T,effective radius R,etc.,experiments were conducted using indicators such as changes in dust concentration and gas emission before and after coal seam water injection as evaluation indicators.The experimental results show that this water injection test resulted in a decrease of 93%and 94%in respirable dust and total dust concentrations during the mining process of the working face,respectively.Smax and Δh2 value has been reduced from the original 4 kg/m and 130 Pa to 2.5 kg/m and 100 Pa,respectively,effectively solving the problem of excessive dust and gas emissions in the working environment of the experimental mining face.
coal seam water injectiondust preventiongas emission
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