煤矿安全2018，Vol.49Issue(1)：73-75,3.DOI:10.13347/j.cnki.mkaq.2018.01.019
深孔预裂爆破在综放工作面坚硬顶板控制中的试验研究
Experimental Study on Deep-hole Pre-splitting Explosion in Hard Roof Control of Fully Mechanized Caving Face
摘要
Abstract
Aiming at the problem that it is easy to cause mine disasters because of the large roof caving step of hard roof coal face in the early mining,selecting the 8935 working face of Xinzhouyao Coal Mine as the research object,the method of deephole pre-splitting explosion weakening roof is proposed.According to the related blasting theory and the theory of mechanics,in combination with the practical condition of 8935 working face,through the analysis of the mechanism of deep-hole pre-splitting explosion weakening roof,the parameters for deep hole pre-splitting blasting are optimized,and the field tests are carried out.Experimental results showed that mine pressure appear is not sharp during the first weighting,the first caving step of immediate roof is about 13 m,and the first weighting step of basic roof is about 34 m;support working resistance slightly increases after blasting,the concentration of CH4 and CO increases for a short period of time;when the top coal falls down in time,it can recycle 33.2 m long coal.Tests show that deep hole pre-splitting blasting plays an obvious role in weakening of roof and can reduce related disasters and increase the top-coal recovery efficiency.关键词
坚硬顶板/深孔预裂爆破/弱化顶板/综放工作面/顶板压力Key words
hard roof/deep-hole pre-splitting explosion/weakening roof/fully mechanized caving face/roof pressure分类
矿业与冶金引用本文复制引用
王金鑫..深孔预裂爆破在综放工作面坚硬顶板控制中的试验研究[J].煤矿安全,2018,49(1):73-75,3.基金项目
国家自然科学基金资助项目(51674173) （51674173）
山西省回国留学人员科研资助项目(2016-040) （2016-040）
