大水头煤矿一采区瓦斯压力临界值考察研究

Study on the Critical Value of Gas Pressure in the First Mining Area of Dashui Coal Mine

瓦斯压力是煤层突出危险性预测的区域重要指标之一,能有效指导防突工作的针对性实施。《防治煤与瓦斯突出细则》中规定,煤与瓦斯突出矿井要针对性开展区域突出危险性预测指标的临界值考察,在考察未确定之前可参考以0.74 MPa作为临界数值。大水头煤矿以工程实测方法对瓦斯压力临界值进行了系统分析和考察,最终得出了矿井煤层瓦斯压力的区域突出危险性预测指标为0.74 MPa,该结果是考虑井下作业人员人身安全、矿井安全与效益得到有效保障,又是符合国家安全要求的最可靠数值,其考察结果和研究方法可为其他矿井开展类似工作提供了有效指导。

Gas pressure is one of the important regional indicators for predicting the risk of coal seam outburst,which can effectively guide the targeted implementation of outburst prevention work.The Detailed Rules for the Prevention and Control of Coal and Gas Outburst stipulate that coal and gas outburst mines should conduct targeted assessment of the critical value of regional outburst risk prediction indicators.Before the assessment is determined,0.74 MPa can be referred to as the critical value.The Dashui Coal Mine conducted a systematic analysis and investigation of the critical value of gas pressure using engineering measurement methods,and ultimately obtained a regional outburst risk prediction index of 0.74 MPa for coal seam gas pressure in the mine.This result considers the personal safety of underground operators,the safety and benefits of the mine,and is the most reliable value that meets national safety requirements.The investigation results and research methods can provide effective guidance for other mines to carry out similar work.