摘要
为有针对性地采取瓦斯治理措施,以平煤股份十一矿己_(16-17)-24070工作面为试验地点,采用以孔代巷区域瓦斯治理技术,运用定向钻机施工梳状定向分支孔,开展了定向钻孔现场工业性试验,测定了工作面原始瓦斯含量、原始瓦斯压力。试验结果表明:(1)采用"定向钻孔+深孔密闭定点取样"技术可以获得煤层的原始瓦斯参数;(2)将定向钻孔主孔布置在煤层顶板稳定岩层,分支孔由煤层顶板穿入煤层,可解决碎软突出煤层钻孔不稳定、易缩径的问题;(3)井下定点取样实测煤层瓦斯含量为3.74~4.91m^(3)/t,最大4.91m^(3)/t,煤层瓦斯压力为0.13~0.43MPa,最大0.43MPa,均小于河南省规定的"双6"标准,确定该范围区域预测为无突出危险区。
In order to take targeted control measures for gas extraction in the Ⅵ_(16-17)-24070 working face of No.11 Mine of Pingdingshan Tian’an Coal Mining Corporation,the technology of gas control with borehole instead of tunnel was adopted and comb-shaped directional branch hole was applied with directional drilling.Field test of directional borehole was conducted,original gas content and gas pressure of Ⅵ_(16-17)-24070 working face were measured.The research results indicates that the original gas parameters of coal seam can be obtained by directional drilling and deep hole sealed coring technique.Main directional borehole is drilled in stable rock layer of roof and branch borehole penetrates into the coal seam from the roof,which can solve the problem of unstable and shrinkage of borehole in the outburst coal seam.The measured gas content is 3.74~4.91 m^(3)/t,and gas pressure is 0.13~0.43 MPa,which are all lower than the"double 6"standard stipulated by Henan Province.It is determined that this area is a non-outburst risk area.
作者
张廷伟
寇建新
孙矩正
ZHANG Ting-wei;KOU Jian-xin;SUN Ju-zheng(State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization,China Pingmei Shenma Group,Pingdingshan 467000,China;Pingmei Coal Mining and Utilization Research Institute,Pingdingshan 467000,China)
出处
《煤炭工程》
北大核心
2021年第7期81-85,共5页
Coal Engineering
关键词
突出煤层
定向钻孔
瓦斯抽采
瓦斯参数
outburst coal seam
directional drilling
gas extraction
gas parameters
