Academic Journal of Engineering and Technology Science, 2019, 2(2); doi: 10.25236/AJETS.020047.
Shoulong Ma1,*
1 China Coal Energy Group Co., Ltd. Xin Ji Group, Huainan 232001, Anhui, China
*Corresponding Author
According to the roof rock mass characteristics of the 210108 working face of the Xinji Coalmine, the initial pressure step distance and periodic pressure step distance of the roof and the corresponding support model and working resistance are calculated. According to calculation results, the blasting step of the roof weakening is determined to be 25m. The field application shows that the hard and hard blasting roof is transformed into a caving roof, which changes the characteristics of the rock pressure in the working face, and has obtained good results in the experiment, and provides a reference for similar projects.
hard roof, weakening, advanced deep hole blasting, blasting parameter
Shoulong Ma. Application of advanced deep hole blasting technology for thick and hard roof weakening in Xinji Coalmine. Academic Journal of Engineering and Technology Science (2019) Vol. 2 Issue 2: 110-117. https://doi.org/10.25236/AJETS.020047.
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