突出煤层区域突出预测指标瓦斯含量临界值研究

Study on gas content critical value of outburst predicted index in outburst seam region

为了准确确定突出煤层区域突出危险性预测指标临界值,保障矿井安全生产,以中岭煤矿一井3号煤层为例,介绍了一种基于历史资料统计、实验室测试研究、综合理论分析和现场考察修正4个方面的区域突出预测指标瓦斯含量临界值递进式确定方法。首先通过对3号煤层进行历史资料统计和实验室测定研究,为综合理论分析提供了基础;其次运用理论综合分析初步确定3号煤层正常区域瓦斯含量临界初值为9.5 m^3/t,为下一步现场考察修正提供了试验初值;最后选取12033工作面对瓦斯含量临界初值进行现场考察和修正,并对修正结果开展扩大应用试验,最终确定3号煤层正常区域突出预测指标瓦斯含量临界值为10.0 m^3/t。研究结果为突出煤层区域突出预测指标瓦斯含量临界值的确定提供了依据。

In order to accurately determine the critical value of the regional outburst danger predicted index for the outburst seam and to protect the mine safety production, taking No. 3 seam in No. 1 Mine of Zhongling Mine as an example, based on the historical information statistics, the lab test study, the comprehensive theoretical analysis and the site investigation modification, the paper introduced the progres- sive determined method of the gas content critical value for the regional outburst predicted index. First the historical information statistics and the lab test study conducted on No. 3 seam could provide the basis to the comprehensive theoretical analysis. Second with the theoreti- cal comprehensive analysis applied, the critical initial data of the gas content in the normal zone of No. 3 seam were preliminarily determined as 9.5 m3/t and could provide the experiment initial data to the late site investigation and correction. Finally, No. 12033 coal mining face was selected for the site investigation and correction on the critical initial data of the gas content and the application experiment was conducted and expanded on the corrected results. In the end, the gas content critical value of the outburst prediction index in the normal zone in No. 3 seam was set up as 10.0 m3/t.The result could provide the basis to determine gas content critical value of the regional outburst prediction index for the outburst seam.