Regional gas control scheme and effect analysis
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摘要: 以平煤十二矿为研究对象，针对其己15-17220工作面由于深部开采导致突出煤层瓦斯压力大、透气性差、区域瓦斯治理的消突效果不理想及煤巷掘进速度缓慢、回采工作面接替紧张等问题，提出了“穿层钻孔+水力冲孔”的区域瓦斯治理方案，并对区域瓦斯治理效果进行了检验分析与指标验证，得出如下结论：残余瓦斯含量和压力分别降低至5.57 m3/t和0.40 MPa，均低于防突规定的临界值，达到了煤矿安全开采的防突标准；钻屑量与钻孔瓦斯涌出初速度分别降至3.5 kg/m和2.18 L/min，指标均未超标，消除了煤层的突出危险性；煤巷月进尺稳步提升，提升了10%，有效缓解了工作面接替紧张问题。治理效果验证了该方案的合理性。Abstract: In view of problems of high gas pressure and poor permeability of outburst coal seam, unsatisfactory of outburst elimination effect of regional gas control, slow speed of coal roadway excavation and tension of working face replacement caused by deep mining on 15-17220 working face in the Twelfth Coal Mine of Pingdingshan Tia'an Coal Mining Co., Ltd., a regional gas control scheme of "crossing boreholes + hydraulic punching" was proposed, and the regional gas control effect was tested and verified. The following conclusions are obtained: residual gas content and pressure are reduced to 5.57 m3/t and 0.40 MPa, they are lower than threshold of outburst prevention regulation, which achieve outburst prevention standard for coal mine safety mining; drilling cuttings and borehole gas emission initial velocity respectively are reduced to 3.5 kg/m and 2.18 L/min, the indicators are not overweight, so as to eliminate outburst danger of coal seam; coal roadway excavation footage is risen every month steady with 10%, and effectively relieves problem of tension of working face replacement. The control results validate rationality of the regional gas control scheme.
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期刊类型引用(7)
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