采区防水煤柱留设合理性分析

Rationality Analysis of Preserved Waterproof Pillar in Mining Area

从采区煤柱两侧采面开采后应力重新分布导水、采面开采上"三带"导水、煤柱两侧下"三带"导水3种煤柱破坏形式论述了煤柱失稳导水原因,提出了增加防水煤柱宽度、注浆、阻断裂隙导水通道等方法防止采区煤柱导水。

This paper discusses instability water conductivity reasons of coal pillar from three coal pillar failure modes after mining at both sides of coal pillar faces, including stress redistribution water conductivity, upper three zones water conductivity at mining face and lower three zones water conductivity at both sides of coal pillar. The methods of increasing width of waterproof pillar, grouting, blocking fissure water guide channel are put forward to avoid coal pillar water conductivity in mining area.