• 中文核心期刊
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  • RCCSE中国核心学术期刊

综放初采期深孔预裂爆破弱化顶板的试验研究

李超, 康天合, 张彬

李超, 康天合, 张彬. 综放初采期深孔预裂爆破弱化顶板的试验研究[J]. 煤矿安全, 2015, 46(10): 28-31.
引用本文: 李超, 康天合, 张彬. 综放初采期深孔预裂爆破弱化顶板的试验研究[J]. 煤矿安全, 2015, 46(10): 28-31.
LI Chao, KANG Tianhe, ZHANG Bin. Experimental Study on Weakening Hard Roof by Pre-splitting Blasting During Initial Mining at Fully-mechanized Caving Face[J]. Safety in Coal Mines, 2015, 46(10): 28-31.
Citation: LI Chao, KANG Tianhe, ZHANG Bin. Experimental Study on Weakening Hard Roof by Pre-splitting Blasting During Initial Mining at Fully-mechanized Caving Face[J]. Safety in Coal Mines, 2015, 46(10): 28-31.

综放初采期深孔预裂爆破弱化顶板的试验研究

Experimental Study on Weakening Hard Roof by Pre-splitting Blasting During Initial Mining at Fully-mechanized Caving Face

  • 摘要: 针对坚硬顶板初次断裂步距大容易引起冲击矿压、瓦斯积聚以及在放顶煤开采中降低初采期间顶煤放出率等问题,对唐安煤矿3301综放工作面进行深孔预裂爆破弱化顶板的设计并进行现场试验。试验表明:优化的炮眼间距、炮眼仰角等爆破参数合理,爆破能够使顶板预裂并改变其受力状态;工作面基本顶初次断裂步距成功地缩短了38.43 m,可增加产量22 801 t;基本顶提前垮落,避免冲击矿压问题,同时避免采空区通风困难导致的瓦斯积聚问题。
    Abstract: To solve the problems such as rock burst, gas accumulation and the low recovery rate of top coal during the initial mining of top coal caving mining caused by hard roof which is hard to break down, the design and field test of weakening roof at 3301 fully-mechanized caving face of Tang'an Coal Mine with the method of deep-hole pre-splitting blasting was set up. The results show that the optimal blasting parameters such as blast hole spacing, hole elevation were reasonable and the blasting can make the roof pre-splitting and change its stress state; the initial roof fracture step distance was shortened by 38.43 m, and the yield increased by 22 801 t. The caving of main roof in advance solves problems of rock burst and gas accumulation in gob result from ventilation difficulties.
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  • 发布日期:  2015-10-19

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