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为探究受多次动压影响深井综放巷道围岩失稳特征及支护技术,以同煤集团麻家梁煤矿为工程背景,利用围岩地质力学参数测试、实测井下多次采动应力场及确定合理煤柱尺寸等方法展开研究。研究结果表明:一次动压影响阶段,超前支撑压力对煤柱的影响范围及影响程度远远小于工作面推过后采动应力对煤柱的影响;二次动压影响阶段,煤柱应力核区位于深度8~18 m钻孔之间,合理煤柱尺寸应至少为55 m,方能保证矿井安全生产。
In order to explore the characteristics of surrounding rock instability and its supporting technology in deep mine gateway fully mechanized caving face under the influence of multiple dynamic pressure, using the Majialiang coal mine of Tongmei Group as the engineering background, by using the geomechanical parameter test of the surrounding rock, the measured multiple stress field And determine the reasonable size of pillars and other methods to start the study. The results show that the influence range of the advance propping pressure on the coal pillar and its influence degree are far less than that of the mining pillar after the mining face is pushed in the dynamic impact stage. In the impact stage of the second dynamic pressure, Located between the depth of 8 ~ 18 m borehole, reasonable coal pillar size should be at least 55 m, in order to ensure mine safety production.