Application of Nitrogen Presplitting Fault Rock Technology in Wenzhuang Coal Industry Co.,Ltd.
The application of nitrogen presplitting technology in the rapid passage of fault rocks in Wenzhuang Coal Industry Co.,Ltd.was analyzed,a method of high-energy nitrogen presplitting hard rock was proposed,and reasonable presplitting parameters were provided.Practice showed that using high-energy nitrogen presplitting technology not only eliminated the drawbacks of traditional explosives,but also led to a crack length of 0.8 m,rock block size of 300-500 mm,and good presplitting effect;after constructing 3 rows of boreholes on the coal wall with a mining height of about 3 m,the coal mining machine can smoothly cut and quickly pass through the fault rock area without any additional tooth loss,achieving the expected effect,which can provide a reference basis for rapid presplitting hard fault rocks in the surrounding coal mines.
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