Research on the diffusion law and treatment technology of hydrogen sulfide in fully mechanized mining face in Wuhushan Coal Mine
In response to the problem of high concentration of hydrogen sulfide during coal cutting at the 011205 fully mechanized mining face of Wuhushan Coal Mine,based on the current situation of the working face,the CD4-type portable hydrogen sulfide tester was used to measure the hydrogen sulfide concentration at the shearer driver's position,as well as the different measuring points at 10 m,15 m,20 m and 25 m sections on the downwind side of the coal shearer during coal cutting.After analyzing the test data,it was found that the concentration of hydrogen sulfide diffused from the coal shearer to the driver's position during coal cutting against the wind was greater than that during coal cutting along the wind,hydrogen sulfide diffused towards cable trays and return airways with the air flow.According to the analysis of test data,the spray method from drum and support is adopted for hydrogen sulfide treatment,and the spray water was added hydrogen sulfide absorbent.Through the underground field test,the economic process parameters were determined with spray pressure of 8 MPa and hydrogen sulfide absorbent concentration of 2.5％,when the hydrogen sulfide concentration at the driver's position is 0.001 06％,and the treatment efficiency is 90.2％.
hydrogen sulfidediffusion lawcoal cutting along or against the windsprayCD4-type hydrogen sulfide tester
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