【作者】 张迪；

【导师】 许进鹏；

【作者基本信息】 中国矿业大学 ， 水文学及水资源， 2016， 硕士

【摘要】 采矿中频发的突水灾害严重威胁煤矿的安全生产。在所有突水灾害中,以采空区突水、断层、陷落柱突水为主,陷落柱突水造成的经济损失最大。恒源煤矿在生产过程中先后发现两个岩溶陷落柱构造,经前期探查导水性微弱。但恒源煤矿在开采过程中,为解决太原组灰岩含水层的高压水害问题,需要对太原组灰岩含水层进行疏干降压。疏干降压的过程,也是对陷落柱的一个扰动过程,有导致陷落柱活化导水的可能性。另从力学角度分析,当水压力发生变化,裂隙的张开度也会发生变化,从而导致陷落柱有活化导水的可能性。针对陷落柱活化导水可能性的问题,采用数值模拟软件UDEC来计算在太灰水压力改变条件下陷落柱活化导水的可能性,确定太灰水疏水降压临界值为1MPa。同时根据陷落柱活化导水监测理论,如果陷落柱发生活化导水,奥灰水首先进入太原组灰岩含水层。太原组灰岩水层水位、水温、水质及物理场性质都会发生变化。因此,可以选择太原组灰岩作为监测层位。监测指标包括水位、水温、水质、电阻率;运用数值模拟软件Comsol Multiphysics来模拟渗流作用下温度场和化学场的分布特征,得到水温异常值和水质异常值;根据恒源煤矿太灰长期抽水试验和观测孔水位确立水位异常值;结合电阻率变化趋势,建立完整的监测系统,保证矿井安全生产。更多还原

【Abstract】 Frequently water inrush disasters made a serious threat to coal mine production safety. In all water inrush disasters, most based on goaf water inrush, fault, and collapse column. Collapse column caused by the maximum economic losses.Hengyuan Coal Mine in the production process have been found two karst collapse column structure, which water conductivity is weak according to the previous probe. But Hengyuan Coal Mine in the mining process, in order to solve the Taiyuan limestone aquifer pressure water damage issues, we need Taiyuan limestone aquifer dewatering buck. Buck dewatering process, is also a disturbing process of collapse column, it has led to the possibility of collapse column and water activation. From another point of view of mechanics, when the water pressure changes, opening of the fracture will change, leading to the possibility of collapse column of water activation.For the problem of the possibility of collapse column water activation, i use the numerical simulation software UDEC to calculate the possibility under the condition of changing the Taiyuan formation limestone water pressure, determining the hydraulic pressure is 1Mpa. According to collapse column water activation monitoring theory, if the water activation occurs Ordovician limestone water first enters the Taiyuan limestone aquifer. Taiyuan formation limestone aquifer water level, water temperature, water quality and physical properties of the field will change. Thus, we can choose Taiyuan formation limestone aquifer as a monitoring layer. Monitoring indicators including water level, water temperature, water quality, resistivity; I use the numerical simulation software Comsol Multiphysics to simulate the distribution of temperature and chemical fields under seepage, then get the water temperature and water quality outliers outliers; According to Hengyuan coal mine Taiyuan formation limestone aquifer long-term pumping test and observation wells established water level outliers; Combining resistivity trends, establish a complete monitoring system to ensure mine safety production.更多还原