深孔控制CO_2预裂爆破在煤巷掘进消突中的应用

煤与瓦斯突出是威胁矿井安全生产的灾害之一,消突对于煤矿高效生产具有重要意义。以余吾煤业为试验矿井,采用深孔控制CO2预裂爆破技术进行煤巷掘进局部防突,并对预裂后的效果进行分析,监测结果表明:CO2预裂后防突指标及可解析瓦斯含量基本不变,且防突效果与迎头打释放孔效果相当;CO2预裂能使迎头煤体松动,化解可能存在的"瓦斯包",且在一定程度上提高瓦斯在煤体中分布的均匀性;瓦斯纯流量变化受抽采负压影响较大且抽采效果较预裂前有所提高;CO2预裂促进了煤巷的快速掘进。

Application for CO_2 Parameter Design of Deep-hole Controlling Presplitting Blasting in Coalroad Driving

Yuwu mine for test,the use of deep CO2 control technology for coal pre-splitting blasting roadway sudden elimination treatment,and the effect of the pre-crack after analyzing,monitoring results showed that: CO2 Presplitting defense resolvable conflict indicators and gas content is essentially the same,and the effect of anti-sudden release of the hole and hit head-on effect is quite; CO2 coal presplit loose head can resolve possible existence of "gas bag",and to improve the uniformity of gas in coal distribution to some extent sex; gas flow changes by the extraction of pure negative impact of improved drainage effect before a larger than expected and crack; CO2 presplitting promote the rapid coal Roadway.