The paper introduces a cushion pad which has simple structure and is easy used in blasting engineering. This device can not only avoid large amount of cracks on the rock slope and cumulative damage to surrounding rock mass upon blasting, but also cushion and reducing vibration of blasting. It is first used in Panzhihua Xujiagou iron open pit, Huayinshan coal mine with gas in SiChuan province, Miaowei hydropower station in Yunnan province and Minshui tunnel blasting engineering in Xin-Fen highway in Hebei-Shanxi province. It effectively cushion the heavy detonation shock from explosion avoiding the damage surface of surrounding rock and accumulated damage of rock, thus improve stability of rock mass and save a large amount of support costs. It is also used for decreasing disaster of engineering blast, e.g., collapse, roof fall or instability landslide. The vibration velocity with cushion is 50% less than with pre-splitting blasting, even less than the threshold of blasting vibration accumulated damage. Ratio of semi-hole archive is about 95%.

Artificial seawall by silt squeezing with blasting dike, a small price for a good seawall than with mechanical dredging, and is effective in preventing this kind of accident from tsunami and typhoon disaster. This paper briefly discusses the pollution situation of poultry and mankind waste in China. For the first time gives the techniques for harmless (China patent ZL 201220109642.1, no flush heathy toilet.) and utilization of waste in China are presented and analysed for benefit utilization. Sanitary toilet without sewers -2019 world break-through technologies (no flush heathy toilet) driven reinvent the toilet challenge, RTTC. Authors also show the technique for harass and utilization of wastes in China. The authors suggest that all the mankind and animal waste, after harmless processing, should be used in a way of useful things as feed, fertilizer, etc. to benefit human society, prevent disease (covid-19, sars) propagation and reduce greenhouse gases. It is also can be used on ship, aircraft, coach and out space etc. (China patent ZL 201220109642.1 is one of several ways of human and livestock faeces harmless treatment, ultraviolet disinfection, ozone fumigation), its weight less than 15kg, volume less than 0.12m3.