东曲矿+860水平带压开采的可行性分析

Feasibility Analysis on Mining under Pressure of Aquifer +860 Level in Dongqu Coal Mine

带压开采,是在底板或顶板具有承压含水层条件下,当隔水层的厚度稍大于临界隔水层厚度或水压值稍小于临界水压值时,利用煤层底板以下相对隔水岩柱的隔水性能,采取综合防探、防治措施,在不触及或少触及岩溶水天然流场条件下,带着全部岩溶水水头压力进行岩溶型煤层的开采,不采取其它疏降措施进行开采的采煤方法。通过分析东曲矿的水文地质条件,对该矿+860水平带压开采的可行性进行了分析,并提出了防治水措施。

The mining under the presses,is under the condition which the roof or the floor have the confined aquifer,when the thickness of aquiclude is larger slightly than the thickness of critical aquiclude or the hydraulic pressure value are less slightly than the critical hydraulic pressure values,uses the water-barrier property of relative impermeable rock pillar below the coal seam floor,adopts comprehensive prevention and exploration,the control measure,under condition no touching or less touching under the karst water natural flow field,with all the head pressure of karst water carry on mining of the karst coal bed,does not adopt the coal mining methods of other dredging and dropping measure to carry on mining.Through analyzing the field hydrogeological conditions of Dongqu coal mine,analyses the feasibility of ＋860 level mining under pressure of aquifer,and puts forward the water control measures.