基于钻孔水文监测信息的顶板水害分析

发布时间：2018-03-11 01:37

本文选题：煤矿水害　切入点：水文监测　出处：《矿业安全与环保》2017年04期 　论文类型：期刊论文

【摘要】：为掌握补连塔煤矿31401工作面顶板突水致灾机理,通过施工井下放水孔、水文观测孔及地面钻孔,分别监测各钻孔的水流量、水位、水位—流量耦合信息,并对上述信息进行挖掘,用于分析顶板渗透性、覆岩变形规律及其与含水层水位变化关系、裂采比与垮采比。分析结果表明:顶板含水层原生裂隙不发育,采前渗透性弱;覆岩破断变形过程经历了张开、闭合过程,并且砂质泥岩遇水泥化、膨胀,填堵导水通道,同时,覆岩变形与含水层水位下降存在必然联系,水位下降滞后周期来压初始时间;采前原生裂隙不发育,采后裂采比为31.93~34.98,垮采比为3.88~4.48。确定该工作面多次出现的周期性顶板突水通道为回采后的导裂带。
[Abstract]:In order to understand the mechanism of water inrush from roof in 31401 working face of Bulianta Coal Mine, the coupling information of water flow, water level, water level and discharge of each borehole are monitored through underground drainage hole, hydrological observation hole and surface borehole. The above information is excavated to analyze roof permeability, overburden deformation law and its relation with aquifer water level change, crack to mining ratio and collapse ratio. The results show that the primary fissure of roof aquifer is not developed, and the permeability before mining is weak; The process of overburden fracture and deformation has gone through the process of opening and closing, and the sand mudstone has encountered cement, expansion and plugging of water diversion channel. At the same time, the overburden deformation is inevitably related to the water level decline of the aquifer, and the initial time of water level falling lag period comes under initial pressure. The primary fissure is not developed before mining, the ratio of post-mining crack to mining is 31.93 ~ 34.98, and the ratio of collapse to mining is 3.88 ~ 4.48. It is determined that the periodic roof water inrush passage appearing in this working face many times is the leading crack zone after mining.
【作者单位】：中煤科工集团重庆研究院有限公司;
【基金】：中煤科工集团重庆研究院有限公司自立基金项目(2013ZDXM14) 重庆市交通科学技术项目(2014-01)
【分类号】：TD745.2

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