涡北煤矿842工作面顶板水力压裂转移侧向采动应力分布规律

水力压裂技术是实现工作面采动应力转移的重要手段之一。以涡北煤矿842工作面为研究背景，通过数值模拟研究顶板水力压裂技术对842工作面侧向采动应力转移效果和规律的影响。结果表明，水力压裂技术可使距离采空区30 m范围内支承压力有较显著降低，但对距离采空区超过30 m外的区域卸压效果微弱。基于数值模拟结果，开展842工作面风巷水力压裂现场工程实践，结合现场智能钻孔窥视测试结果，发现水力压裂后老顶砂岩中产生了明显的压裂裂隙，为有效阻隔842工作面侧向采动应力向841工作面沿空掘巷传递提供了良好的条件。研究成果对于指导顶板侧向采动应力转移具有一定的理论与工程意义。

The Roof Hydraulic Fracturing Transfer Lateral Mining Stress Distribution Legislation in 842 Working Face in Wobei Coal Mine

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 30m 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.