The increasing demand for coal and depletion of shallow depth reserves are pushing towards deeper mining. In deeper coal mines with multiseam workings, the problem of ventilation surges many folds primarily related to air quantity requirement, heat, humidity and spontaneous heating/fire in goaved (gobbed) out areas. The paper describes the design of a new approach to improve the ventilation system of a real-life deep underground coal mine with multiseam workings. For this, the ventilation problem of one deep underground coal mine 6&7 pits Bhutgoria Amalgamated Colliery of Tata Steel Ltd. with multiseam workings has been studied in detail to determine an appropriate solution. A ventilation survey of the mine and computer simulation of the ventilation network has been carried out to reach a practical solution. Ventilation survey results have been analysed to develop a representative ventilation network of the mine for both qualitative and quantitative analysis. Further, computer simulation of the ventilation network of the mine has been performed to virtually verify the application of a high-capacity booster fan in the present ventilation circuit without disturbing the vulnerable areas. Field validation is also carried out after the implementation of the solution in the mine to determine its efficacy. Thus, the findings of this paper can be directly applied for the installation of booster fans to achieve the required air quantity in deep underground coal mines with multiseam workings having spontaneous combustion liabilities of upper seam goaved out areas.

对煤炭的需求增加和浅层储量的枯竭正在推动更深的开采。在具有多煤层工作的较深煤矿中，通风问题激增许多倍，主要与采空（采空）区域的空气量需求、热量、湿度和自热/火灾有关。本文描述了一种新方法的设计，以改进具有多煤层作业的真实深井地下煤矿的通风系统。为此，对塔塔钢铁有限公司的一个深井 6 和 7 坑 Bhutgoria 混合煤矿的通风问题进行了详细研究，以确定合适的解决方案。已经进行了矿井通风调查和通风网络的计算机模拟，以达成切实可行的解决方案。对通风调查结果进行了分析，以开发具有代表性的矿井通风网络，用于定性和定量分析。此外，还对矿井通风网络进行了计算机模拟，以虚拟验证大容量增压风机在当前通风回路中的应用，而不会干扰脆弱区域。在矿井中实施解决方案后，还要进行现场验证，以确定其功效。因此，本文的研究结果可直接应用于上煤层采空区具有自燃倾向的多煤层深井煤矿安装增压风机以达到所需风量。