松软特厚煤层区域穿层钻孔风动卸煤消突效果分析

Effect Analysis of Outburst Elimination in Soft and Superhigh Coal Seam by Dismounting Coal Capitalize on Wind-Force in Grossmeasures Boreholes

针对超化矿区域煤层厚度大,煤质松软,采用水力冲孔措施消突效果差的现状,通过分析采用风动卸煤措施与水力冲孔措施后钻孔卸煤量、瓦斯抽采浓度和抽采量的差异,结果表明:利用风动卸煤措施后单孔平均卸煤量和单位时间卸煤量为水力冲孔措施钻孔的2.55倍、3.63倍,钻孔施工班时仅为水力冲孔的0.7倍;瓦斯有效抽采时间增加12%,单孔瓦斯抽采量大幅度提升,有效的降低煤层瓦斯含量达到了理想的卸煤增透消除煤层突出危险性的效果。

According to the inferior effect of the application of hydraulic flushing technology to soft and superhigh coal seam in Chaohua mine, this paper discussed the differences of the amount of coal dismountd capitalize on Wind-Force and hydraulic flushing,also the disparity of the concentration and the quantity of gas extraction. The study showed that the average amount of coal dismountd capitalize on Wind-Force in the single hole is 2.55 times as many as hydraulic flushing,while the amount of coal disburdened per unit time is 3.63 times and the time spend on drilling is 0.7 times. Under the action of the measures,the effective drainage time is increased 12%, whatever, the quantity of gas extraction aregreafly enhanced.The depressurization efficiency has been successfully reached when thegas content declined substantially..