Both the newly found Leijiaqu Coalfield of Zhangwu County and the Badaohao Coalmine of Heishan County are located in the Heishan Basin. Liaoning No.101 and No.107 Coal Exploration Crew conducted the coal resource prospecting work in Leijiaqu successively since 1970s. However, restricted by the limited theoretical geological knowledge, the outdated equipment as well as the difficulty for deep exploration, such prospecting result as small coal seam reserve, bad coal quality, unstable buried depth and low industrial value for mining and construction has been achieved. After preliminary exploration, the coal reserves in Leijiaqu Coalfield is about 12 to 15 billion tons, the extracting seam thickness is about 18 meters and the extractable area is more than 20 square kilometers. There are five extractable coal seams with the buried depth of 500 to 1200 meters.

Leijiaqu Coalfield of Zhangwu County is equivalent to Aiyou Vertical Well or Qinghemen Coalmine in coal reserves, introduced by Zhang Junbao, Chief Engineer of No.17 Exploration Crew. If the annual production is up to 1.5 million tons, the recovery ratio is 70% and the retained reserves reaches 120 million tons, then the achieved the mining life is for 53 years after rough calculation. The mining work will need over 3000 stuff; such scale is rare in Liaoning Province and is discovered for the first time after the Aiyou Vertical Well (21 million tons) found in 1982. (From Internet)