Study On Optimization Of Strip Water Conservation Mining Parameters In Changlebao Coal Mine

After the integration of ChangLe Bao mine,the range of mine field is mostly in level II protection area of the water source in Yulin,The local soil erosion and desertification are very serious[1-2],Which belongs to the "water-preserved-mining".The primary task of mine is water conservation mining.The bedrock of Changle Bao Coal mine is thin,in order to prevent water inrush accident,and considering the existing technical and economic factors,at this stage can adopt the method of strnp mining in long wall mining system.The essence of the technology of n Strip water conservation mining"by strip mining is essentially that the whole overburden rock is not deformed and destroyed by setting up a long time stable pillar,it can maintain the stability of aquifer structure and achieve the goal of"water-preserved-mining".Similar simulation test shows that using the method of "mining 12 remaining 8"strip mining,the bearing of each strip is uniformly loaded and the overlying rock remains stable.After the completion of the mining,the maximum support pressure of the coal pillar is 6.45MPa,which is far below the limit strength of coal pillar.This mining method can achieve"water-preserved-mining".Strip mining has good stability both on the roof and on the surface.Providing theoretical support for water-preserved-mining and safe and efficient production under the similar geological conditions.