Peng Kang

Central outside-vein house pillar type combined crosscut two-end inside-vein continuous segment filling mining method

Boundary-controlled room column type sublevel open stoping subsequent stage filling mining method

Chessboard chamber pre-protection top upward middle-length hole ore-breaking segmented filling mining method

Diskless region type connection roadway continuous sectional cut-and-filling stoping method shared by chamber and jambs

Single point displacement meter used for measuring stope roof strata displacement

Seesaw-type timbering roof building remaining ore extraction method

Suspension type recyclable filling retaining wall for downward drift method

Upward horizontal layered filling mining method of stress arch continuous mining

Room-and-pillar major-diameter longhole inverted-step-like segmented lateral caving subsequent filling mining method

Speeded-up separating wall for drift filling