补连塔煤矿12511工作面覆岩导水裂隙带发育特征  

Development characteristics of overlying rock water-conducting fracture zone in 12511 working face of Bulianta Coal Mine

作　　者：马腾飞 刘宁 武轶凡 MA Tengfei;LIU Ning;WU Yifan(Bulianta Coal Mine,Guoneng Shendong Coal Group Co.,Ltd.,Ordos 017200,China;China Coal Technology&Engineering Group Information Co.,Ltd.,Xi′an 710000,China)

机构地区：[1]国能神东煤炭集团有限责任公司补连塔煤矿,内蒙古鄂尔多斯017200 [2]中煤科工集团信息技术有限公司,陕西西安710000

出　　处：《洁净煤技术》2024年第S01期690-695,共6页Clean Coal Technology

基　　金：国家自然科学基金资助项目(52076037);浙能集团科技资助项目(ZNKJ-2021-003)

摘　　要：采动诱发覆岩导水裂隙带发育范围探测及机理研究对于科学指导煤矿井下涌水量统计、工作面水害防治及保水开采具有重要意义。本研究以神东矿区补连塔煤矿12511工作面为地质原型,基于物理模型试验对工作面开采引起的导水裂隙带发育高度进行研究,并通过钻孔视频与冲洗液漏失量的结果进行综合评定。研究结果表明:物理模型试验测试的顶板初次来压步距50.6 m,平均周期来压步距为15 m,岩层断裂角变化范围为32°~60°,平均51°,顶板基本运动方式主要为离层、弯曲、断裂、回转、垮落;工作面从100 m位置到推进至200 m位置过程,随着顶板的破断并不断压实,覆岩裂隙密度从初次来压时的20条/m降至16条/m。冒落带发育高度35.7 m,裂隙带发育高度为118 m,依据现场钻孔视频与冲洗液流失量监测结果,认定导水裂隙带高度为93.12 m,冒落带高度为36.52 m,裂采比为16.63∶1。研究证明了基于物理相似模型试验得出的导水裂隙发育特性结果的合理性,对于推动覆岩导水裂隙带发育高度的研究具有重要意义。The detection of the development height of the water-conducting fracture zone in the mining overburden and the relevant theoretical research are of great significance for scientific guidance of the statistics of water inflow in the coal mine,the prevention and control of water hazards in the working face and the water-conservation mining.The research takes the 12511 working face of Bulianta Coal Mine in Shendong Mining Area as the geological prototype,and uses the combination of physical similarity simulation test and field borehole flushing fluid leakage observation method to obtain the height of fractured zone caused by the mining of the working face.The results show that the average periodic weighting step of the working face is 15 m,the initial weighting step is 50.6 m,the variation range of rock fracture angle is 32~60°,the average is 51°,and the basic roof movement mode is mainly delamination,bending,fracture,rotation and collapse;When the working face is advanced to 100m,the maximum fracture density at the place where the initial weighting occurs reaches 20 pieces/m.When the working face is advanced to 200 m,the fractured rock mass in this range is gradually compacted,the fracture development density is reduced to 16 pieces/m.The final development height of the caving zone is 35.7 m,and the fractured zone is 118 m;According to the leakage amount of drilling flushing fluid on site and the color TV observation of drilling holes,the fractured zone height is 93.12 m,16.63 times the mining height,and the height of the collapse zone is 36.52 m.The results of the physical similarity model test based on the development characteristics of the water conducting fracture are reasonable and can be used as a reliable method for the study of the development height.

关 键 词：神东矿区 模型试验 现场观测 导水裂隙带 

分 类 号：TD745[矿业工程—矿井通风与安全]