The invention provides an
intelligent control system for gas extraction of an underground
coal roadway and a control method of the
intelligent control system, and belongs to intelligent regulation and control of a gas extraction
system of a
coal mine. The
intelligent control system comprises a regulation system and an alarming system; and the regulation system consists of a
gas concentration sensor, a flow sensor, an electric valve, a regulation
signal acquiring circuit, a single-
chip microcomputer, a
relay driving circuit and a valve
driving circuit. According to a method of the regulation system, the opening degree of the electric valve is sequentially regulated from big to small; the maximum value of pure flow is found out under the condition that requirements on minimum concentration of gas extraction are met; the electric valve is set at the opening degree corresponding to the maximum pure flow and is automatically reset after a period of time; and the above procedures are carried out again. The alarming system consists of a
gas concentration sensor, an alarming acquiring circuit, a single-
chip microcomputer, a
liquid crystal display circuit and a
buzzer circuit. According to a method of the alarming system, alarming signals of the
gas concentration sensor are processed through the single-
chip microcomputer; the
buzzer circuit gives an alarm; and the
liquid crystal display circuit displays a gas leaking place. By the
intelligent control system for gas extraction of the underground
coal roadway, extraction is controlled intelligently and an optimum extraction effect is achieved.