CAJ | 학술논문

坚硬顶板工作面若顶板不能及时垮落，会在采空区上方形成大面积悬顶，对人员、巷道和设备会形成严重的威胁。以15306坚硬顶板工作面为试验对象，通过合理确定水力致裂弱化顶板方案和注水工艺，实施了水力致裂弱化顶板试验。试验结果显示，有效弱化了15306工作面顶板，其有效致裂半径达12 m ，对于消除大面积悬顶，保证工作面安全回采具有重要的意义。
견경정판공작면약정판불능급시과락，회재채공구상방형성대면적현정，대인원、항도화설비회형성엄중적위협。이15306견경정판공작면위시험대상，통과합리학정수력치렬약화정판방안화주수공예，실시료수력치렬약화정판시험。시험결과현시，유효약화료15306공작면정판，기유효치렬반경체12 m ，대우소제대면적현정，보증공작면안전회채구유중요적의의。
Large unsupported roof will occur above the mined-out area which would seriously threaten person‐nel ,roadway and equipment if the roof can't collapse in time on the face of hard roof .15306 hard roof face being used as test object ,water fracturing weakening roof has been tested by reasonable water fracturing weakening roof scheme and grouting technique .The testing results show that the roof of 15306 face has been weakened ef‐ficiently and its efficient fracturing radium reaches 12 m ,which has great significance for the removing of large unsupported roof and the safety mining of the face .