Device and method for measuring gas parameters in hole bottom closed space of underground directional long drill hole while drilling

The invention relates to an underground directional long drill hole bottom closed space gas parameter measurement-while-drilling device, which belongs to the technical field of coal mine safety, and comprises an outer wall (1) and a cabin body (2), the cabin body (2) comprises a control cabin (4), a plurality of plugging cabins (5) and a gas parameter detection cabin (6) which are connected in sequence; fixing feet (16) fixedly connected with the outer wall (1) of the measurement-while-drilling device are arranged on the outer sides of the cabin walls of the control cabin (4), the plugging cabin (5) and the gas parameter detection cabin (6); a central channel for communicating the inside of the cabin body with the outside of the outer wall is arranged in the fixing foot (16); the control cabin (4) is used for controlling the plugging cabin (5) and the gas parameter detection cabin (6); the plugging cabin (5) is used for receiving a control instruction and plugging an annular space between the outer wall (1) a