Experimental study on forced ventilation and dust -control in a heading face based on response surface method

Aiming at the problems of unreasonable air flow distribution and serious dust pollution in roadway under forced ventilation of coal mine in a heading face, this study conducted experimental research based on response surface method, and effectively reduced dust concentration by changing air flow distribution in roadway. Firstly, a single factor experiment was conducted to explore the impacts of air outlet wind speed (Va), distance from air outlet to heading face (LS), and driving height (Hd) on the dust concentration at the position of the driver (Y1) and the height of the pedestrian breathing belt (Y2). Subsequently, a comprehensive air flow control response surface test was designed based on the Box-Behnken principle to optimize the dust field, with Y1 and Y2 as the response index. Finally, the sequence of the impact of each variables on the dust concentration and the optimal air flow scheme were determined through the response surface method. The test results showed that the order of significance of Y1 was Hd > Va > LS, and the order of significance of Y2 was LS > Va > Hd. The maximum error between the test value and the predicted value in the optimization model is only 4.01%, the dust concentration at the driver's position and the pedestrian's breathing belt height decreased by 57.7% and 53.8%, respectively, and the dust-control effect was obvious.

Automated summary

This study aimed to solve the problems of unreasonable air flow distribution and serious dust pollution in coal mine roadway under forced ventilation. By conducting experimental research and using the response surface method, the air flow distribution in the roadway was adjusted to effectively reduce dust concentration. The results showed that the dust concentration at the driver's position and the pedestrian's breathing belt height decreased significantly.