The invention discloses a
laser methane detection alarm apparatus for a
coal mine. The
laser methane detection alarm apparatus comprises a shell body,a
laser methane sensor,a main circuit board and adisplay screen,wherein the laser methane sensor and the main circuit board are arranged in the shell body,the shell body is composed of a
front cover and a back cover which are fixedly connected through a bolt,a display screen transparent window is formed in the
front cover,and the display screen is arranged in the display screen transparent window; the
front cover is further provided with an on-off key,a plus key and a minus key; the main circuit board comprises a CPU,an acousto-optic alarm module,a setting module,a detection module and a
power module; the laser methane sensor,the acousto-optic alarm module,the setting module,a
voltage collection module,the detection module,the
power module and the display screen are all connected with the CPU,the acousto-optic alarm module is further connected with the setting module and the detection module,a displayer is further connected with the setting module,the detection module and the
power module respectively,and the detection module is connected with the laser methane sensor.