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空场法回采所形成的大型采空区的顶板冒落产生的空气冲击气浪将严重影响矿山的生产安全,此类矿山一般采用在空区底部保留碎石垫层预防顶板冒落冲击,但是碎石垫层的瞬间滤波效果有限,开通天窗泄压效果更明显。运用气体质量守恒定律计算确定了天窗的开通面积,并采用深孔分段爆破的方式形成282~335m2的泄压高天窗,为矿山安全生产提供了保障,也可为类似矿山的空区处理提供借鉴。
The air blast caused by the roof caving of the large-scale gob-area formed by the recovery of the empty field method will seriously affect the safety of the mine production. Such mines generally use the gravel cushion at the bottom of the vacant area to prevent roof falling impact, but Momentary gravel cushion filter effect is limited, open the sunroof pressure relief effect is more obvious. Using the law of conservation of gas mass, the open area of the skylight is determined, and the pressure relief high skylight of 282 ~ 335m2 is formed by deep-hole blasting in section, which can provide security for the mine safety and also provide the mine clearance for similar mines Learn from