HAO M, ZHANG B Y.Study on parameter optimization of static crushing technology in working face containing faults[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(6):16-23.

doi:10.16186/j.cnki.1673-9787.2021070017

Received:2021/07/06

Revised:2021/09/01

Published:2022/11/25

Study on parameter optimization of static crushing technology in 

working face containing faults

HAO Ming1,2, ZHANG Boyang3,4

1.China Energy Yulin Energy Co.，Ltd.，Yulin  719000，Shaanxi，China；2.School of Mines，China University of Mining and Technology，Xuzhou  221116，Jiangsu，China；3.School of Civil Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China；4.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China

Abstract:Static crushing technology has been widely used in coal mining，but different crushing parameters often have a great influence on the crushing effect of rock mass.In order to set reasonable static fracturing parameters to ensure that the working face smoothly passes through the hard rock mass of the fault，the 51106 fully mechanized mining face of Guojiawan coal mine encountering small fault was taken as an example in this paper.First，the crushing mechanism of static crushing agent was analyzed through mechanical theory，and then numerical simulation methods were used to qualitatively and quantitative analysis the influence of different rock mass boundary conditions，different fracture hole layouts，different fracture hole diameters and different pitch and aperture ratios on the siltstone crushing effect.The results showed that the crushed rock mass was mainly tensile failure in the static fracture process，and a small amount of shear failure was mixed between the tensile failures； When the top and both sides surfaces of the crushed rock mass were free，the three crushing effect indexes were the highest，and the static crushing effect was the best；Under the circumstance that the cost of crushing hole drilling and the difficulty of construction did not change much with the diameter，as the diameter of crushing hole increased，the penetration rate，cracking rate and damage rate of adjacent crushing holes per unit area of rock mass gradually increased，and the rate of increase was getting faster and faster； From the perspective of cost performance and rock crushing and mining requirements，the most reasonable pitch and aperture ratio of fracturing hole was 6～7.

Key words:static crushing technology;fault;numerical simulation;parameter optimization;fracturing effect index

 003_2021070017_郝明_H.pdf