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在地下采掘活动的影响下,导水断裂带未能贯穿含水层时,大井法计算的涌水量误差较大。针对这种情况,对复杂地质条件合理概化,建立导水断裂带未能贯穿含水层的水文地质概化模型,对大井法进行改进,将含水层概化为垂直方向上互不影响的两元结构,提出倒置非完整大井法,可以分别计算顶部和侧向的水量,使其更贴近实际情况;并结合相关理论进行推导,得出相应的数学模型。结合彬长矿区亭南矿和胡家河矿2个工作面的现场实测地质资料,应用该方法计算涌水量,并与实际涌水量进行对比,结果较为准确,验证了顶板巨厚基岩含水层采动影响下,倒置非完整大井法计算涌水量的合理性。
Under the influence of underground excavation activities, when the aqueduct fails to penetrate the aquifer, the error of water discharge calculated by the big well method is larger. In view of this situation, it is reasonable to generalize complex geological conditions, establish the hydrogeological generalization model that the water-conducting fault zone can not penetrate the aquifer, improve the big well method, and generalize the aquifer into two vertical Element structure, the inverted non-complete big well method is proposed, and the top and the lateral water volumes can be calculated respectively to make it closer to the actual situation; and the relevant theories are deduced to derive the corresponding mathematical model. Combined with the measured geological data of two working faces in Tingnan mine and Hujiahe mine in Binchang mining area, this method was used to calculate the water inflow and compared with the actual influx, which was more accurate and validated the influence of mining on the top and bottom of thick bedrock aquifer Under the inversion of non-complete well method to calculate the rationality of water inflow.