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首先介绍人们对煤层气(煤矿瓦斯)的能源价值及其温室效应的认识过程;接着从我国煤与煤层气两种资源开采过程中的一些矛盾引出协调开采问题;然后从采气对采煤的影响和采煤对采气的影响两方面深入探讨煤与煤层气协调开采的含义,即对煤矿区煤层气与煤炭资源统一编制开发利用方案,在追求地面井抽采综合经济效益的同时尽可能减小对后续煤炭资源安全开采的不利影响,在充分利用井巷工程进行井下抽采的同时尽可能提高抽采量、抽采浓度,在保障安全和资源回收率的前提下使煤层气地面井抽采、井下抽采与煤炭资源开采的综合经济效益最大化;最后,对煤层气抽采的几个关键问题做定量分析,包括平行钻孔煤层气抽采率的理论计算,根据回采工作面瓦斯浓度不超限与煤巷掘进过程中不发生煤与瓦斯突出的条件反求预抽煤层气允许的残余含量等,其结果可用于煤与煤层气协调开采设计、评估等定量计算。
Firstly, the people’s understanding of the energy value of coalbed methane (CMM) and its greenhouse effect are introduced. Then, some contradictions in the mining of coal and CBM resources in our country lead to the coordinated mining problem. Then, Influence and coal mining on gas production in two aspects of in-depth exploration of coordinated mining of coal and coalbed methane meaning that coal mine methane and coal resources unified development and utilization program, in the pursuit of surface well extraction comprehensive economic benefits as much as possible Reduce the adverse impact on subsequent safe mining of coal resources, make full use of underground engineering to carry out underground gas drainage while maximizing the extraction volume and pumping concentration, and make the CBM surface well under the premise of ensuring safety and resource recovery rate Extraction, underground gas extraction and coal resource exploitation; finally, quantitatively analyzed several key issues of CBM extraction, including the theoretical calculation of coalbed methane extraction rate in parallel drilling, according to the working face Gas concentration does not exceed the limit and the coal tunneling process does not occur in the case of coal and gas outburst reversal of pre-pumping CBM allowable residual content, the results can be For coal and coal bed methane coordinated mining design, assessment and other quantitative calculations.