深部大采高综采面矸石充填开采技术

Gangue Stowing Technology of Full-mechanized Mining Face with Large Mining-height in Deep Mine

针对邢东矿剩余煤炭资源的85%以上为村庄压煤难题,提出了在12212大采高综采面采用综合机械化矸石充填开采技术。选取"波依亭—汤姆逊体"作为矸石充填体流变模型,并计算其流变方程,进而得出采空区顶板最大下沉量为σ0/K1以及其与矸石充填体刚度成反比关系。运用数值模拟软件FLAC3D模拟计算邢东矿12212综采面采用垮落法和矸石充填处理采空区时顶板运动规律,模拟结果表明矸石充填大大降低了等效采高,在40m测点处顶板下沉量仅为25mm。此外,还对邢东矿12212综采面矸石充填采煤工艺进行了介绍,充填后地表下沉量仅有15mm。

In order to solve the difficult problem that 85% of residual coal resource of Xingdong Colliery is under villages, technology of gangue-stowing full-mechanized mining for 12212 large-mining-height face was put forward. Selecting “Wave pavilion- Thomson body” as rheological model and calculating its rheological equation, it was obtained that the maximum subsidence of roof above gob wasσ0/K1 , and that there was inverse relation between maximum subsidence of roof above gob and stiffness of stowing body. Applying FLAC3D to simulating and comparing roof movement rule of 12212 full-mechanized mining face with caving and stowing method, it was showed that gangue stowing largely reduced equivalent mining height, roof subsidence was only 25mm at the 40m testing point. Gangue stowing mining technique of 12212 face was introduced. Surface subsidence was only 15mm after stowing.