Performance Analysis of Static Crushing Agent and Experimental Study on Fracturing Effect
In order to solve the problems of low safety and poor applicability of pre-splitting blasting in the existing coal mine under-ground mining process,as well as the harsh hydraulic fracturing conditions and weak rock breaking effect,a static fracturing method was proposed.By studying the reaction state and fracturing effect of static crushing agent under different influencing conditions,the re-action temperature,reaction time,reaction volume change,rock sample fracturing effect and stress change of static crushing agent un-der different mixing water temperature and water-cement ratio were studied.The results show that when the water cement ratio is con-stant,the complete reaction time of the static crushing agent decreases with the increase of the mixing water temperature,but the tem-perature remains unchanged after the final reaction.Under the condition of the same mixing water temperature,the smaller the water-cement ratio,the shorter the reaction time of the static crushing agent and the faster the reaction rate.The smaller the water-cement ra-tio is,the shorter the cracking time of the concrete specimen is.The larger the water-cement ratio is,the longer the cracking time is.The cracking effect is related to the crack location,and the block strain increases first and then decreases.
static demolition agentwater cement ratiomixing water temperaturefracturing effectvariation of stress
万方数据
维普
