孟村煤矿采空区覆岩“两带”高度观测及计算  

Observation and calculation of “two zones” height of overburden in gob of Mengcun Coal Mine

作　　者：吴继铎 李东东 WU Jiduo;LI Dongdong(Shaanxi Binchang Mining Group Co.,Ltd.,Xianyang 712000,China;Tongchuan Branch of Shaanxi Coalbed Methane Development and Utilization Co.,Ltd.,Tongchuan 727000,China)

机构地区：[1]陕西彬长矿业集团有限公司,陕西咸阳712000 [2]陕西省煤层气开发利用有限公司铜川分公司,陕西铜川727000

出　　处：《陕西煤炭》2023年第4期205-208,共4页Shaanxi Coal

摘　　要：煤层采后覆岩导水裂隙带发育高度不同,会引起煤层上覆不同含水层的水体涌入井下,准确探查煤层开采后“两带”发育高度对煤矿防治水工作具有重要的指导意义。采用钻孔冲洗液漏失量观测法结合彩色电视窥视法,对孟村煤矿401101工作面进行了“两带”高度的探查,综合确定裂采比为18.6,冒采比为4.3。同时,通过对1411孔洛河组水位的跟踪观测,总结出了随着工作面的推进,导水裂隙带发育的规律,即随着工作面采后距离的增大,覆岩破坏形成的导水裂隙带最高点也继续向上移动。期间可能存在短暂的裂缝弥合,随着工作面的继续向前推采约97 m(1个月),导水裂隙带发育完成。实践表明,冲洗液消耗量观测和彩色电视窥视2种方法相结合,可以对“两带”发育高度观测结果进行对比和印证,是有效确定“两带”发育高度的技术手段。The different development height of the overburden water flowing fractured zone after coal seam mining would cause the water of different overlying aquifers inrushing to shaft.The accurate observation on the development height of“two zones”after mining is of guiding significance for water disaster prevention in coal mine.The“two zones”height of 401101 working face of Mengcun Coal Mine is probed using the drilling flushing fluid leakage method and the color TV peeping method.It is comprehensively determined that the fracture-mining ratio is 18.6 times and the caving-mining ratio is 4.3 times.At the same time,through the follow-up observation of the water level of the bore 1411 Luohe formation,the development law of water flowing fractured zone is obtained with advance of the working face,that is,with the increase in the post-mining distance of the working face,the highest point of the water flowing fractured zone formed by overburden damage also continues to move upward,during which there may be a short-term fracture closure,and the development of the water flowing fractured zone is completed after the working face advancing by 97 m for one month.The results show that the combination of observation on the consumption amount of flushing fluid and the color TV peeping method is a technical means to determine the development height of two zones,which compare and verify the results.

关 键 词：采空区 冲洗液消耗量 水位跟踪观测 导水裂隙带 冒落带 “两带”高度 

分 类 号：TD745[矿业工程—矿井通风与安全] TD325