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| Research on hydraulic fracturing technology of roof long drilling hole in No.4205 Face of Longquan Company |
| Zhang Kai |
| Taiyuan Coal Gasification ( Group ) Co., Ltd., Taiyuan 030032, China |
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Abstract No.4203 Face of Longquan Energy Development Co., Ltd. had strong roadway stress during mining, and the deformation of roadway floor heave and two sides was large, which seriously affected the safe production and mining speed of the working face. In order to ensure the smooth mining of the adjacent No.4205 Face, it was decided to relieve the pressure on the roof of the two crossheadings of the working face. This paper analyzed the widely used deep hole blasting and hydraulic fracturing pressure relief technology, and decided to adopt hydraulic fracturing. According to the actual situation of No.4205 Face, the hydraulic fracturing scheme was designed. Practice showed that after the implementation of the designed pressure relief scheme, the roof could collapse in an orderly manner as planned, and the floor heave and the deformation of the two sides were effectively controlled, which ensured the safe and efficient mining of No.4205 Face.
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