勘察阶段深埋长大隧中道煤层瓦斯涌出与突出的预测研究

The forecasting study on coal gas emergence and burst in deep,long and Wide Tunnel at Prospecting Stage

公路、铁路深埋长大隧道在勘察设计阶段如何进行煤层瓦斯的预测与评价工作，尚无成熟经验。但是，运用瓦斯地质的基础理论和测试方法，结合隧道工程地质特点，在勘察阶段预测煤层瓦斯的涌出与突出，是可行的。煤层瓦斯的涌出与突出，主要与煤层瓦斯含量、压力及影响瓦斯赋存的地质因素有关。作者在勘察阶段着重进行地质因素调查、分析，并采用地勘阶段适用的测试方法，建立了瓦斯突出的综合判据，初步建立了勘察阶段瓦斯地质工作的思路与方法。

How to forecast and evaluate the coal gas at the stage of prospecting and design of deep, long and wide tunnel in building highway and railway is in an exploring phase. However, it is feasible to forecast coal gas emergence and burst at prospecting stage through applying the fundamental theory and determine methods of coal gas combining with the geological characteristic of the tunnel engineering. The emergence and burst of coal gas is mainly related to coal gas content, pressure and the geological factors which influence the coal gas storage. Through the investigation and analysis of geological factors and using the determine methods which suit for the prospecting stage, the authors built the comprehensive judgment criterion of coal gas burst, set an way of coal gas geological work at prospecting stage initially.