Abstract: For the problem of coal and gas outburst in Chensilou Coal Mine, based on gas geology and tectonophysics theory, the cause of “4·10” coal and gas outburst was discussed from geological factors and engineering factors by using field investigation and numerical simulation. The results show that the pressure-torsional en-echelon faults caused the shearing stress concentration and structural deformation of rock bridge area, destroyed coal body structure and congregating gas. It provided the elastic internal energy and gas expansion energy for coal and gas outburst, and it was main geological factor of the coal and gas outburst. The fault activation caused by mining stress disturbance induces coal and gas outburst. On above basis, the coal gas comprehensive prevention and controlling measures of were proposed, including of strengthening fault prediction, using a reliable prediction system coal and gas outburst and strengthening gas drainage measures.