摘要
为了分析燕子山井田石炭系主采煤层开采过程中水害条件的安全性,依据钻探和物探地质勘探手段,对井田范围内的石炭系开采煤层上覆的侏罗系采空区积水和下伏寒武系灰岩水水文地质条件进行研究。水文试验观察表明,矿区主要含水层中地下水矿化度较高,富水性差,水体径流缓慢。瞬变电磁法探测数据处理的结果表明太原组上覆侏罗系采空区有多个积水区。水文孔试验资料结果分析表明,寒武系岩溶水的水头标高均大于太原组可采煤层的底板标高,太原组5~#煤层和8~#煤层皆属于带压开采;突水系数法计算结果表明,在钻孔控制范围内5~#煤层底板突水系数整体小于0.06 MPa/m,而8~#煤突水系数整体大于0.06 MPa/m。在煤矿开采过程中,应重点防治上覆采空区积水和8~#煤底板承压水带来的矿井突水安全隐患。
In order to analyze the safety of water damage condition in the mining process of the Carboniferous main coal mining layer in Yanzishan well field, based on drilling and geophysical prospecting methods, the paper studies the hydrological geological conditions of water accumulation in Jurassic goaf overlying Carboniferous mining layer and lower Cambrian limestone water underlying Carboniferous mining layer. The experimental observation of hydrology shows that the salinity of groundwater in the main aquifers is high, and the water yield property is poor, also the runoff of water is slow. The results of transient electromagnetic method show that there are several stagnant water areas in overlying Jurassic goaf. The karst water level elevation is higher than the Cambrian coal seam floor elevation, the No.5 and No.8 coal seams are of mining above aquifer. The calculation results of water inrush coefficient show that the water inrush coefficient of No.5 coal seam is less than 0.06 MPa/m, and the water inrush coefficient of No.8 coal seam is greater than 0.06 MPa/m. In coal mining process, it is key to prevent the overlying goaf water and mine water inrush caused by pressurized water in No.8 coal floor.
作者
张永国
ZHANG Yongguo(Xinzhou Teachers Univeristy, Xinzhou 034000, Chin)
出处
《煤矿安全》
CAS
北大核心
2018年第4期177-180,共4页
Safety in Coal Mines
关键词
燕子山井田
岩溶水
瞬变电磁法
突水系数
采空区
Yanzishan Coal Mine
karst water
transient electromagnetic method
water inrush coefficient
goaf
