山西介休青云煤矿底板奥灰水区域治理目的层位研究

Study on the Target Strata of Regional Treatment of Ordovician Limestone Water in the Bottom Plate of Qingyun Coal Mine in Jiexiu,Shanxi Province

区域治理作为华北型煤田底板奥灰水治理的重要技术方法,为奥灰水害的治理起到了重要作用。区域治理的关键是治理层位的选择。为准确选择确定华北型煤田底板奥灰水治理目的层,以山西介休青云井田为研究对象,在分析煤系底板地层结构、岩性特征、奥灰含水层富水性特征、突水危险的基础上,提出了底板奥灰水区域治理目的层位的四项原则,即治理后突水系数T≤0.06MPa/m、厚度大且发育稳定、随钻测井曲线易识别便于判层以及具有稳定的顶底板。根据该原则对青云井田底板奥灰含水层进行精细分析,并将奥陶系峰峰组上段确定为底板奥灰区域治理目的层。该层选择方法在青云煤矿南部采区F3断层西侧进行地面区域治理项目中进行了应用。治理后,经钻孔验证,奥陶系峰峰组灰岩基本没有涌水,注浆治理效果显著。

Regional governance,as an important technical method for the treatment of Ordovician limestone water in the floor of North China type coalfield,has played an important role in the treatment of Ordovician limestone water hazards.The key to regional governance is the selection of governance layers.In order to accurately select and determine the target layer for the treatment of Ordovician limestone water in the floor of North China type coal fields,taking the Qingyun mine field in Jiexiu,Shanxi as the research object,based on the analysis of the stratigraphic structure,lithological characteristics,water abundance of the Ordovician limestone aquifer,and water inrush risk of the coal measures floor,four principles for the target layer of the floor Ordovician limestone water regional treatment were proposed,namely,the water inrush coefficient T≤0.06MPa/m after treatment,large thickness and stable development,easily identified well logging curves,and stable roof and floor.According to this principle,a detailed analysis was conducted on the Ordovician limestone aquifer on the floor of Qingyun Mine Field,and the upper section of the Ordovician Fengfeng Formation was determined as the target layer for the treatment.The selection method of this layer was applied in the regional management project on the west side of F3 fault in the southern mining area of Qingyun Coal Mine.After treatment,it was verified through drilling that the limestone of the the Ordovician Fengfeng Formation has basically no water inflow,and the grouting treatment effect is significant.