摘要
曾多次发生的以松散含水层作为井下水害主要诱因的煤层顶板事故,已经造成了大量的财产损失且大大威胁着煤矿生产安全以及井下人员的生命安全,以松散层底面至煤层开采上限间留设的安全煤岩柱能起到断绝开采煤层与煤系地层上覆松散层的作用,留设安全防砂(塌)煤岩柱高度的研讨直接关乎矿井安全准则,在生产科研方面是不可或缺的。研究以孙疃煤矿101采区为例,采用岩心取样、土工实验、抽(注)水实验、XRD衍射等方法,对采区内松散层底部三隔和四含的岩性特征、黏土微结构特征、物理、水理等方面进行研究,得出结论:孙疃煤矿101采区三隔是良好隔水层,四含单位涌水量和渗透系数值均较小,属弱富水的含水层,为矿井浅部煤层的安全回采提供了有利的条件。
The coal seam roof accident that has occurred many times with loose aquifer as the main cause of underground water disaster has caused a lot of property damage and greatly threatened the safety of coal mine production and the safety of underground personnel. The safety coal and rock pillar left between the bottom of the loose layer and the upper limit of coal seam mining can play a role in cutting off the overlying loose layer of the mining coal seam and the coal-bearing strata. The re-search on the height of the safety coal and rock pillar is directly related to the mine safety criterion and is indispensable in production and scientific research. Taking the 101 mining area of Suntuan Coal Mine as an example, the lithology characteristics, clay microstructure characteristics, physical and hydraulic characteristics of the 3rd aquiclude and 4th aquifer at the bottom of the loose layer in the mining area are studied by means of core sampling, geotechnical experiment, pumping (injection) water experiment and XRD diffraction. It is concluded that the 3rd aquiclude of the 101 mining area of Suntuan Coal Mine is a good aquifuge, and the unit water inflow and permeability coefficient of the 4th aquifer are small, which is a weak water-rich aquifer, which provides favorable conditions for the safe mining of shallow coal seams in the mine.
出处
《矿山工程》
2022年第4期359-370,共12页
Mine Engineering
