1Study on depth optimization of external trench in open-pit mineZHANG Zhouai, JU Xingjun, LI Yanfei, HUANG YukaiTheory and Research1-42Study on blasting vibration rule of cast blasting in Heidaigou Open-pit Coal MineTANG XiaoqianTheory and Research5-8,123Research on blasting effect prediction method of open-pit mine based on support vector machineZHANG Gencheng, LIAO Yaofu, WANG JianwenTheory and Research9-124Discussion on matching relationship between main access and the number of trucks in open-pit mineZHOU Haohao, HU Zhaoxiang, HU GuiyingTheory and Research13-16,215Analysis on shear strength parameters of weak interlayer in seam floor of Zhundong Open-pit Coal MineYIN Xiuwen, LIU Shangge, LIANG QuanqingTheory and Research17-216Study on influence of site vibration on slope safety in Open-pit Coal MineHAN Liang, YAN JieTheory and Research22-257Research progress on topsoil substitute material of open-pit coal mineZHOU GuochiTheory and Research26-298Research on deformation and failure of dump with nearly horizontal weak baseZHAO Lichun, LIU Deli, WANG YanzhuoTheory and Research30-329Study on groundwater control of typical open-pit coal mines in Loess PlateauYE YongxiangTheory and Research33-35,4010Study on effect of blasting vibration on adjacent culverts based on wavelet analysis in Heidaigou Open-pit Coal MineYAN JieTheory and Research36-4011Research on diffusion law of dust movementXU Zhanjin, XU GuojunTheory and Research41-4412Ecological environment evaluation based on remote sensing ecological index in Pingshuo Open-pit MineYIN JianpingTechnology and Application45-4713Design of automatic rewinding and unwinding system of cable carPAN Hongtao, WANG XifangTechnology and Application48-5114Gyroscope north seeking technology based on the principle of autonomous positioning and orientationYANG Jun, FENG Haiyang, ZHAO Xue, SUN Haiying, GUO Ji, FAN WeiTechnology and Application52-5415Hydraulic system of new hydraulic excavator based on LUDVJIANG Peng, LYU Xiumei, WANG Tao, WANG ZhanwuTechnology and Application55-57,6116Application of virtualization technology in Shengli Energy CompanyHANG ChengbaoTechnology and Application58-6117Application of fuel monitoring and management system in Zhunneng digital minesWANG HuiTechnology and Application62-64,6818Development of lubrication timer for mining truck based on STC microcontrollerHOU FangleiTechnology and Application65-6819Ideas and suggestions for intelligent mine construction planningLIU HaifengTechnology and Application69-71,7520Design and stability analysis of increase of internal dump in Hequ old county open-pit mineLUO Ke, ZHANG Yu, LIU ZhenTechnology and Application72-75 