Kaiyang Phosphate Mine Project in Guizhou Province

In April of 2006, JCHX was awarded the contract from the Guizhou Kailin Group for Tender A (Yongshaba Mine, Qingcaichong Mine) construction and Tender B (Maluping Mine) construction of its 4 million tons per year reforming and expansion project. That was our first chemical mine domestically.
The auxiliary ramp of the Yongshaba Mine is 676 meters long; and the excavation quantity is 9,479m3. The conveyor incline shaft of the Qingcaichong Mine is 1,935 meters long; with an excavation quantity of 29,170m3. The conveyor incline shaft of the Maluping Mine is 1,464 meters long; with an excavation quantity of 21,881m3. The auxiliary ramp of the Maluping mine is 1,615 meters long, with an excavation quantity of 30,701m3.
The challenge with the Kailin mine construction is rock that is easily broken. All constructions must be supported with rock bolting, shotcreting and wire net; while the big chambers and cross points need support with steel wire rope bolting. JCHX used a construction method whereby a smaller section is excavated and then it is enlarged with temporary rock bolting and shotcreting support, at the end with permanent rock bolting, wire netting and shorcreting support. We have achieved good results, with an average monthly advance for the excavation of the ramp is 120 meters; the fastest advance is 150 meters in one month. The average monthly advance for the excavation of the incline is 140 meters; the fastest excavation in one month is 190 meters.