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东林煤矿用综合方法揭开煤层石门,其措施是:①水力冲孔;冲孔原则是先边缘后中间,冲孔时喷孔程度强弱与冲孔前后、钻孔所在位置、冲孔时间长短有关。经过喷孔的钻孔瓦斯压力大幅度下降而达到卸压目的。②金属骨架措施可防止喷孔后石门两帮或上方煤层抽顶而发生的动力现象。为了安全可靠揭开煤层采用深孔爆破方法。
Donglin coal mine with a comprehensive method of uncovering coal seams, the measures are: ① hydraulic punching; punching principle is the first edge of the middle after the punching hole when the degree of intensity and before and after punching, drilling location, punching time Length related. The pressure of boreholes after nozzle hole drastically decreased to achieve the purpose of pressure relief. ② metal skeleton measures to prevent the spray hole after the Shek Mun two coal gangna roof or over the top of the power phenomenon occurred. In order to uncover the safe and reliable use of deep hole blasting method.