【作者】 付军辉； 黄炳香； 林府进； 武文宾；

【Author】 FU Junhui;HUANG Bingxiang;LIN Fujin;WU Wenbin;Chongqing Institute,China Coal Research Institute;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology;

【机构】 中煤科工集团重庆研究院； 中国矿业大学煤炭资源与安全开采国家重点实验室；

【摘要】 采用分析岩石损伤破裂过程的RFPA^2D-Flow数值计算软件,研究了大阳煤矿3401综放面煤壁前方煤层水力致裂对采场矿压的应力扰动过程。结果表明:随水压力的增大,围岩应力会不断经历集中、转移再集中的过程,受水力致裂的影响顶板压力释放,高应力值不再出现,低应力值出现的较为密集,弱化了顶板（煤）,围岩被湿润弱化,湿润弱化范围逐渐向四周扩展。现场试验验证了煤层水力致裂对卸除覆岩高应力、弱化坚硬顶板和提高放顶煤采出率的有积极作用。更多还原

【Abstract】 Using the method of numerical simulation of RFPA^2D-Flow to study disturbed processes of mining pressure’s stress that were produced by hydraulic fracturing of coal seam in the fully mechanized caving Face 3401 in Dai Yang Coal Mine. There are some results, with the water pressure increases, the stress of rock experienced the process of the concentration,transfer and reconcentration.With the water pressure increases, roof pressure are released by the effects of hydraulic fracturing of coal seam;there was no longer the high stress;low stress appeared more concentrated;the roof（coal） were wetted and weakened;weakening range gradually expanded to all around of the area.The face practice tested and verified that the hydraulic fracturing of coal seams played a positive role in removing high overburden stress, weakening the roof and raise top coal drawing rate.更多还原