Set aside the plastic hinge along the empty wall sandwich Anchorage - solve special thick seam Gob - in order to solve the big problem of high or high gas coal mining without coal pillar mining problems to overcome along the empty left lane for this coal may exist Wall security issues. New inventions reserved plastic hinge reinforced concrete sandwich wall anchor emerged. Technology patented invention is the use of a new program to coal as the main body of the composite anchor reinforced concrete structures. This structure full of high-strength concrete surface continuity and coal body closed the advantages of both, the use of anchor bolt to form a reinforced composite properties. In theory, this wall although lower than ordinary concrete strength, but higher than the average of several grades of coal pillar strength. The technology uses high strength characteristics of coal continuity formed along an empty wall body, use concrete anchors on both sides of the use of coal and coal prestressed concrete anchoring together to form a body to bolt for the reinforcement ribs pre Stress sandwich concrete wall. This structure full of high-strength concrete surface continuity and closure of coal body, forming a reinforced composite properties using anchor bolt. It is very cheap outstanding patents. Anchorage sandwich concrete wall several significant advantages: 1) tight closure properties along the roadway any unmatched. Under no circumstances will not lead to Air Leakage; 2) the overall carrying capacity equivalent to 1.5m composite wall of reinforced concrete wall strength. Enough to support the ability to control the dynamic subsidence along the empty side of the roof to ensure safe recovery; 3) Mechanical pressed on the law to make full use of the roadway surrounding rock stress at a reasonable buck area. Reduce roadway maintenance; 4) construction method is simple and reliable. No professional construction equipment.