薄煤层作为保护层开采的卸压机理

参考七台河新兴煤矿地质条件,运用理论分析和数值模拟方法,对薄煤层作为保护层开采时,其围岩应力变化和被保护层的应力分布特征、卸压范围等进行分析。研究结果表明,随着上保护层开采范围的增大,采空区下的煤岩应力急剧下降,被保护层达到安全开采的区域范围也不断增加,卸压效果相当显著。

Mechanism of Pressure Relief for Thin Coal Seam as Protection Seam

Based on geological condition of Xinxing Colliery of Qitaihe,this paper applied theoretical analysis and numerical simulation to researching stress distribution characteristic and pressure relief range of mining thin coal seam which was as protection seam.Results showed that with mining range of upper protective seam enlarged,stress of coal and rock under gob decreased abruptly and the safe mining range of protected seam enlarged,which indicated that pressure relief effect was obvious.