CAJ | 학술논문

原位现场压水试验是获取岩层阻渗性能参数的可靠方法，为探究某煤矿深部煤层底板阻渗能力，采用现场压水试验方法对底板两段岩层进行了测试并获取了大量的实测数据。结果分析表明：该底板两测试段岩层在原始状态均不导渗，阻渗性较强，直至压裂导通才形成导渗条件；对两段岩层均进行了初次和重复两个压水过程，对比两次试验可知，测渗孔水压力与注水孔水压力的关联变化趋势大致相同，但初次压水的起始导渗水压明显高于重复压水，表明在初次压水后岩层的阻渗能力降低，更易形成导渗；采用渗透系数和阻渗强度作为指标，对底板岩层的阻渗性能进行了量化评价，结果表明测试岩层表现出明显的高阻弱渗的特点。
원위현장압수시험시획취암층조삼성능삼수적가고방법，위탐구모매광심부매층저판조삼능력，채용현장압수시험방법대저판량단암층진행료측시병획취료대량적실측수거。결과분석표명：해저판량측시단암층재원시상태균불도삼，조삼성교강，직지압렬도통재형성도삼조건；대량단암층균진행료초차화중복량개압수과정，대비량차시험가지，측삼공수압력여주수공수압력적관련변화추세대치상동，단초차압수적기시도삼수압명현고우중복압수，표명재초차압수후암층적조삼능력강저，경역형성도삼；채용삼투계수화조삼강도작위지표，대저판암층적조삼성능진행료양화평개，결과표명측시암층표현출명현적고조약삼적특점。
In situ field packer permeability test,being a reliable method to obtain the param-eters of permeability barrier performance of strata,was used to explore this performance of deep coal seam floor. A large amount of measured data were obtained after the test on two layers of floor strata. The test results showed that these two layers of floor strata could not seep in initial state due to stronger barrier performance until the fracture and connection led to seepage. Co MPared with the first and repeated packer permeability tests on these two layers of floor strata, the variation of water pressure in measured pore was associated with that in water injection hole, but the seepage pressure in the first time was higher than that in second time,showing that the permeability barrier performance of strata turned weaker after first packer permeability test and was easy to form seepage. Using permeability coefficient and permeability barrier strength as in-dexes,the permeability barrier performance of floor strata has been quantitatively evaluated,and the results showed that the tested strata was characterized with high barrier performance and weak permeability.