煤矿区煤层气三区联动立体抽采理论与模式
Three Region Linkage Three-Dimensional Gas Drainage Theory and Mode of Coal Bed Methane in Coal Mining Area
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摘要: 为了实现煤矿区煤炭与煤层气2种资源的安全高效协调开发,基于煤炭开发时空接替规律,将煤矿区划分为规划区、准备区、生产区3个区间,分别采用地面钻井排采、地面与井下联合抽采以及本煤层钻孔抽采等不同的瓦斯抽采技术以保证煤炭安全高效生产。根据煤矿安全生产容许最高瓦斯含量数学模型、煤层瓦斯压力数值模拟模型和煤层气立体抽采优化专家系统,创立了三区联动的区域递进式立体抽采模式(晋城模式),提高了煤炭资源采出率,实现了煤矿瓦斯井下抽采和地面原位抽采2个独立产业模式的有效衔接,解决了煤层气开发与煤炭开采的时空矛盾。Abstract: In order to realize the safety and high efficient coordinative development of coal and coal bed methane resources in the coal mining area,based on the ti me and space replacing law of the coal development,the coal mining area was divided into three regions,including the planning region,preparation region and productio n region.The gas drainage with the surface drilling wells,the combined drainage with the surface and underground boreholes,the gas drainage in the mining seam and d ifferent gas drainage technology were individually applied to ensure the safety and high efficient coal production.According to the mathematics model of the max gas co ntent allowed by the coal mine production,the numerical model of the seam gas pressure and the optimized experts system of the coal bed methane drainage,a regional progressive three-dimensional gas drainage model(Jincheng Mode) of three region linkage was created.The recovery rate of the coal resources was improved,an effecti ve connection of the industrial models with the underground mine gas drainage and the surface in-place gas drainage could be realized and the time and space contradi ction between the coal bed methane development and the coal mining was solved.
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