带压开采掘进巷道隐伏陷落柱探查与治理
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摘要
为了查明不连沟煤矿F6207工作面运输巷掘进工作面前方构造的类型、富水性和范围,采用音频电透、瞬变电磁、直流电法等物探方法和井下钻探,对巷道隐伏构造进行探查。物探结果表明:在19号硐室前方180m附近,存在物探异常区,且具有导水性。结合井下钻探,确定该构造异常区为导水陷落柱,位于巷道掘进工作面正前方37.63m处,其长轴约66m,短轴约42m。提出了"两轮注浆+堵水效果检测"的防治措施,设计了治理方案和钻孔参数;并根据治理方案,采用静压分段下行式循环充填注浆、静压分段下行式循环裂隙注浆2种注浆工艺,成功治理了富水陷落柱,实现了安全掘进。
In order to determine the type,water-rich and scope of the geological structure in front of the driving face of the transportation roadway in F6207 working face of Buliangou Coal Mine,the audio frequency,transient electromagnetic,direct current geophysical prospecting and underground drilling were used to explore the buried geological structure of the roadway.The results showed that there was a geophysical anomaly area with water conductivity near 180 m in front of the 19 th chamber.Combined with downhole drilling,the structure anomaly area was determined as a water guiding collapse column,and it was located at 37.63 mstraight ahead of the heading end of the roadway,its long axis was about 66 m,the short axis was about 42 m.The prevention and control measures of"three-round grouting mode+water plugging effect detection"were put forward,and the static grouting process was carried out by static pressure sectioned down-flow circulating filling grouting and static pressure sub-staged cyclic cracking.The water-rich collapse column was successfully controlled and safe excavation was realized.
In order to determine the type,water-rich and scope of the geological structure in front of the driving face of the transportation roadway in F6207 working face of Buliangou Coal Mine,the audio frequency,transient electromagnetic,direct current geophysical prospecting and underground drilling were used to explore the buried geological structure of the roadway.The results showed that there was a geophysical anomaly area with water conductivity near 180 m in front of the 19 th chamber.Combined with downhole drilling,the structure anomaly area was determined as a water guiding collapse column,and it was located at 37.63 mstraight ahead of the heading end of the roadway,its long axis was about 66 m,the short axis was about 42 m.The prevention and control measures of"three-round grouting mode+water plugging effect detection"were put forward,and the static grouting process was carried out by static pressure sectioned down-flow circulating filling grouting and static pressure sub-staged cyclic cracking.The water-rich collapse column was successfully controlled and safe excavation was realized.
引文
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[2]焦阳,白海波.煤层底板含隐伏溶洞滞后突水机理[J].煤炭学报,2013,38(S2):377-382.
[3]许进鹏,宋扬,成云海,等.陷落柱及其周边地应力分布研究[J].矿山压力与顶板管理,2005,22(4):118-120.
[4]张村,屠世浩,白庆升,等.陷落柱周边应力变化及推采控制研究[J].中国矿业大学学报,2014,43(6):974-980.
[5]赵国飞,康天合,杨永康,等.工作面直接过陷落柱的盐酸软化法及其试验研究[J].采矿与安全工程学报,2014,31(1):97-101.
[6]郝兵元,张玉江,戚庭野,等.综采面过陷落柱采动应力与柱体应力相互影响模拟研究[J].采矿与安全工程学报,2015,32(2):192-198.
[7]张星宇,许延春,高玉兵,等.推采陷落柱工作面支承压力状态演变规律研究[J].中国矿业大学学报,2019,48(2):278-286.
[8]武文清,李冲.隐伏陷落柱探查与治理技术研究与应用[J].煤炭与化工,2016,39(12):31-34.
[9]姚邦华,王连成,魏建平,等.煤矿陷落柱突水的变形-渗流-冲蚀耦合模型及应用[J].煤炭学报,2018,43(7):2007-2013.
[10]李振华,谢晖,李见波,等.采动影响陷落柱活化导水规律试验研究[J].中南大学学报(自然科学版),2014,45(12):4377-4383.