China Coal Technology & Engineering Group Shenyang Engineering Company

Kaijia Zhang

Peng Li

Haisheng Qiu

Hongzhen Zhang

Xing Ni

Zhigang Fan

Shipeng Xue

A prediction method for coal and gas outburst based on comparing borehole gas flow curves includes the following steps: constructing a seam-crossing borehole in the coal seam, measuring or calculating gas flow corresponding to critical gas pressure P, which is a reference gas flow Q(t); performing linear regression on the reference gas flow Q(t)to form a reference flow curve; constructing a predicted seam-crossing borehole in a predicted area, and directly testing a gas flow at each time t in a delayed manner, which is a predicted gas flow Q(t); performing linear regression on the predicted gas flow Q(t)to form a predicted flow curve; and judging whether the predicted flow curve is above the reference flow curve or whether the predicted flow curve intersects with the reference flow curve, and judging whether the coal seam in the predicted area has a risk of coal and gas outburst.

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Liaoning, China

Kaijia Zhang