Abstract：In order to promote the timely collapse of the roof in the goaf of No.2 Coal Seam in Xingdong Mine, the research on roof cutting and pressure relief technology was carried out in No.2129 Face. On the basis of comparing different pressure relief methods, hydraulic fracturing top cutting pressure relief was determined. The mechanism of hydraulic fracturing top cutting was analyzed. Through theoretical calculation, the main parameters of hydraulic fracturing such as water injection pressure, top cutting height and borehole layout were determined. The field application showed that after hydraulic fracturing roof cutting was adopted in No.2129 Face, the periodic pressure step and pressure intensity were reduced, the roadway deformation was significantly reduced, the coal wall slope was significantly improved, and the ideal pressure relief effect was achieved, which provided a reference for the control of hard roof under similar conditions.
杨洪增1,2,3,4. 坚硬顶板水力压裂切顶卸压技术实践[J]. 煤炭与化工, 2023, 46(1): 21-24.
Yang Hongzeng1，2，3，4. Practice of hydraulic fracturing and top cutting pressure relief technology for hard roof. CCI, 2023, 46(1): 21-24.
