Practice And Research Of The Rate Of Recovery Of The Coal In Xiao Nan Coal Mine

Xiao Nan coal mine was built and put into production in 1980 , by expanding, the present annual production capacity is up to more than 2,400,000 tons. It is an important problem to Xiao Nan coal mine that how to utilize facilities on ground or under ground , how to prolong the time of service of Xiao Nan coal mine in maximum and how to improve the rate of recovery of coal. This thesis proposes some effective ways and methods to improve the rate of recovery of coal in order to prolong the service of coal mine by concluding and studying the practice of recoverying coal resources at most in Xiao Nan coal mine. It also talks about the effects on Xiao Nan coal mine. The thesis still combines the example that full-automatic coal ploughs from Germany are successfully used in Xiao Nan coal mine, talks about the application and management of coal plough under normal and special producing conditions. Because space is limited, the maintenance of the equipment is not been touched upon. It is the important developing direction that the high yield to and the high efficiency to the thin coal seam with coal plough. It can realize the working place without people. Because tunneling rate of ten thousand tons working place with coal plough is high, so how to accelerate the speed of tunneling half a coal and half a rock tunnel and how to realize high-effective integration of mechanical digging and supporting are the...