Mine ventilation frequency wet dust removal system for the heading face of coal mine dust in air.
矿用通风湿式变频除尘系统，用于对煤矿井下掘进工作面的空气进行除尘。
As forced draught was used, a distance less than 10 m from the venting duct to heading face was suitable.
采用压入式通风时，风筒口距工作面在10米以内较适宜。
Advancing hole is one of local prevent outburst measure at coal road heading face in coal-and-gas outburst mine.
超前钻孔是煤与瓦斯突出矿井中煤巷掘进工作面的局部防突措施之一。
According to hazard theory and principle of selecting assessment index, the paper constructs assessment index system of gas explosion in heading face.
根据危险源理论和评价指标选择原则，建立了掘进面瓦斯爆炸评价指标体系。
The reliability of regression analysis is validated through numerical simulation; and the larger pre-settlement of vault crown is achieved ahead of heading face.
通过数值模拟验证了该分析结果的可靠性，并且开挖面前方的超前拱顶下沉量较大。
The practice demonstrates that the prediction to adverse geologic condition in front of the heading face by boring radar and BEAM electric method, especially to water-holding condition, is satisfied.
实践表明，采用钻孔雷达和BEAM电法探测技术对隧道掌子面前方的不良地质情况，尤其是含水情况具有较好的预测结果。
The practice demonstrates that the prediction to adverse geologic condition in front of the heading face by boring radar and BEAM electric method, especially to water-holding condition, is satisfied.
实践表明，采用钻孔雷达和BEAM电法探测技术对隧道掌子面前方的不良地质情况，尤其是含水情况具有较好的预测结果。
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