基于五图双系数法的煤层带压开采研究

Research on mining with water pressure of coal seam based on five figures and double coefficients method

随着华北型煤田开采向深部延伸,煤层带压开采是矿井防治水的首要问题。突水系数法是目前最常用的带压开采评价方法,但该方法考虑因素较少,具有一定的局限性。针对这一问题,以范各庄矿为例,采用五图双系数法和突水系数法进行带压开采对比研究,并结合水文地质资料,综合分析奥灰水害威胁,提出有针对性的防治水措施。研究发现:五图双系数法与突水系数法计算结果一致,研究区属于带压开采安全区,但在回采前也应对工作面进行水文地质探查,并在回采期间做好指示层监测工作,确保安全生产。

As the mining of North China briquette field extends to the deep mining,coal mining under water pressure is the primary problem of mine water prevention and control.Water inrush coefficient method is currently the most commonly used evaluation method for mining under water pressure.However,this method has some limitations due to its fewer factors considered.To solve this problem,taking Fangezhuang Mine as an example,the five figures and double coefficients method and water inrush coefficient method are applied to conduct a comparative study on mining under pressure,combined with hydrogeological data,a targeted water prevention and control measure is proposed with the Ordovician limestone water hazard threat being comprehensively analyzed.It is concluded that the calculation results of the five figures and double coefficients method are consistent with that of the water inrush coefficient method.The study area is a safe zone for mining under water pressure.However,the working face should also be investigated for hydrogeological before mining,and the indicator layer monitoring should be done during mining to ensure safe production.