Abstract:

For current mining pipe connections of gas drainage in Chengzhuang coal mine has much defects，such as bulky, perishable, easy to water, larger human factors when pipe connections, a new type of gas drainage pipe connections is proposed, this deceive includes orifice flow control valve, the telescopic tube member, adjustable joints, are used PVC material and antistatic coal mine rubber and can adapt to changes in drilling height, can be adapted to changes in the borehole spacing, can be adapted to borehole angle changes, the roadway deformation ,it also has the function of orifice flow regulating Compared with the current pipe connections, it has a light weight, pipe connecting speed and efficiency significantly improved, anti-corrosion, effectively prevent the pipeline clogging of water and cinder.

Key words: gas drainage, pipe connection, flow control, concentration