煤矿采空区高温区域分析界定及治理

矿井发生内因火灾时,采取采空区高温区域分析界定的方法,通过综合分析气体情况、钻孔现象、测温情况、钻孔参数等内容,能够大致确定高温区域的位置,为内因火灾的治理提供科学依据。利用该方法确定补连塔煤矿三盘区高温区域位置,并采用综合灭火措施靶向治理了该区域高温隐患,为矿井安全生产提供了保障。

采空区高温点判断原理及治理一氧化碳超限技术

青岗坪煤矿42106工作面末采挂网时出现CO气体严重超限,正确分析CO气体的来源和采空区高温点的位置,对迅速治理CO超限,保障矿井的安全至关重要。本文介绍了高温点位置的原理,分析了科学注氮治理CO气体超限的方法和效果。

崔庄煤矿采空区高温点防治技术实践

采空区出现高温点是采空区煤炭自然发火的前兆。提前发现并有效消除高温点,可以有效阻断煤炭自然发火的路径,消除采空区煤炭自燃的风险。通过分析崔庄煤矿采空区高温点从前期发现到后期治理所采取的一系列措施,确定并实施采空区高温点的相关治理技术,取得了良好的效果,保证了安全生产。

极近距离采空区下高温氧化区安全开采防灭火技术研究

采空区遗煤自然发火事故是煤矿在生产过程中存在的主要自然灾害之一,严重威胁矿井安全生产,尤其是极近距离采空区下,工作面回采期间漏风通道多,上覆采空区遗煤防灭火治理难度大,存在自然发火风险。文章通过对高温氧化区火灾防治进行阐述,分析总结极近距离采空区下煤层开采防灭火综合治理经验,为同等条件下工作面防灭火灾害治理提供技术和实践经验。

Minimum secure speed of fully mechanized coal face based on critical temperature of coal spontaneous combustion

The critical temperature theory of spontaneous combustion of coal and the numerical simulation method are used to explore the minimum secure speed of fully mechanized coal face to prevent the spontaneous combustion in goaf. Combined with the actual situation of workface 31005 in a coal mine, the highest temperatures in goal at different advancing speeds were obtained by the numerical simulation of spontaneous combustion in goal, and then a power function equation between the highest temperature and the advancing speed was achieved by regression analysis. The advancing speed corresponding to the critical temperature value was taken as the minimum safe speed of workface based on the equation. Finally, the accuracy and reliability of the speed were verified by the actual advancing process of workface 31005. The results of this research show that the new judgment method of the minimum safety speed has a higher value to be applied in the field.