Hydraulic fracturing technology is one key approach to achieve stress transfer in mining.By conducting a numerical modeling study on the 842 working face of the Wobei Coal Mine,the impact of roof hydraulic fracturing technology on lateral mining stress transmission and the law governing the 842 working face are investigated.The results indicate that hydraulic fracturing technique can effectively reduce sustaining pressure within a distance of 30 m from the goaf,while its pressure relief effect diminishes beyond this range.Based on these numerical simulation findings,field engineering practice was conducted for hydraulic fracturing in wind tunnel at the 842 working face.Combining these results with those obtained from intelligent drilling peeping tests revealed significant fracture fissures generated in the old top sandstone after hydraulic fracturing,providing a good condition for effectively blocking the transfer of lateral mining stress from 842 working face to 841 working face along the hollow digging road.The research results have certain theoretical and engineering significance for guiding the lateral mining stress transfer of the roof plate.
关键词
水力压裂/应力转移/侧向支承压力/沿空掘巷
Key words
hydraulic fracturing/stress transfer/lateral support pressure/roadway driven along goaf
维普
万方数据