According to the problems of complicated hole sealing processes and low gas concentration in bottom pumping alley of Pingdingshan coal mine, this paper proposes a new sealing technology, i.e. “two stuck and a grouting”, and describes the principle of the device sealing and sealing process in detail. This paper also points out that in gas drainage this method can achieve good results, but the drilling field of D23 of coal bottom pumping alley at the thirteenth mine in Pingdingshan cannot get the desired effect, so the research of all aspects must be discussed. By measuring the average gas concentration of each group of D23 drilling field, it concludes that each group borehole gas average concentrations are less than 30%, not reaching the expected effect of gas extraction, so we consider the actual geological data and the water around this drill field. It also concludes that the fault around the drilling field is developing and communicating air of bottom alley into the drilling hole, water can also make effects on the concentration of the gas extraction. At last, this paper puts forward three technical measures to make them better, that is suitable extraction drilling position, reduce the influence of the water, and developing hole sealing quality.