【摘要】 采用微震监测技术、相似材料模拟试验和现场支架工作阻力宏观观测等方法,对15 m以上特厚煤层综放采场支架合理工作阻力进行研究。支架阻力宏观观测表明,正常情况和老顶来压情况下,支架安全阀开启都较为频繁,说明13 000 kN/架的支架额定工作阻力不能满足目前工作面开采的需要,支架工作阻力在正常情况下为9 000～12 000 kN/架,老顶来压时大于13 000 kN/架。通过相似模拟试验研究,得到特厚煤层综放采场支架工作阻力为:正常情况下,支架合理工作阻力为9 000～13 000 kN/架;低位老顶来压情况下,为13 000～17 500 kN/架;高位老顶动压情况下,为17 500～23 000 kN/架。微震监测结果表明,支架工作阻力在正常情况下平均为10 971.45 kN/架,异常来压时大于13 333.95 kN/架。将相似材料模拟试验、现场宏观观测和微地震监测研究结果进行定性对比研究,可得支架工作状态分为三类:正常情况、低位老顶来压和高位老顶来压。更多还原

【Abstract】 By using microseismic monitoring technology,similar material simulation test and macro observation of support resistance in project site,the reasonable working resistance of hydraulic support is studied.Macro observation of support resistances shows that the support resistances under normal circumstance and abnormal circumstance(the main roof strata pressure) are 9 000–12 000 kN/frame and 13 000 kN/frame respectively.Similar material simulation test shows that the resaonable working resistances of support are 9 000–12 000 kN/frame under normal circumstance and in the case of the lower main roof pressure and the higher main roof pressure those are 13 000–15 000 kN/frame and 17 500–23 000 kN/frame respectively.Microseismic monitoring results show that the support resistance under normal circumstance is 10 971.45 kN/frame on average,and that under abnormal pressure is greater than 13 333.95 kN/frame.Hydraulic support working resistance is obtained through the similar material simulation test.Comparative study among similar material simulation experimentf,ield macro observation and microseismic monitoring shows that the working state of support can be divided into three categories,i.e.normal state,low roof strata pressure and high roof strata pressure.更多还原